The degradation of para-nitrophenol (PNP) pollutant under visible light (ZnCo2S4/CuO/PMS/Vis) via ZnCo2S4/CuO heterojunction activated peroxymonosulfate has been investigated in detail. The results indicate that 50 % ZnCo2S4/CuO performs best under light conditions, and after adding 4 mM PMS, the degradation rate of PNP reaches 98 %. The study systematically examines the effects of important parameters (PMS dosage, pH, and coexisting anions) on PNP degradation and verifies the excellent performance of the photocatalysis-activated PMS system through comparative experiments. Electron paramagnetic resonance (ESR) and free radical quenching experiments revealed that 1O2 contributes the most to the degradation performance of PNP.
{"title":"ZnCo2S4/CuO heterojunction photocatalyst for activation of persulfate to degrade p-nitrophenol","authors":"Ruoxue Zhou , Hao Cheng , Gunel Imanova , Sridhar Komarneni , Jianfeng Ma","doi":"10.1016/j.jphotochem.2024.116146","DOIUrl":"10.1016/j.jphotochem.2024.116146","url":null,"abstract":"<div><div>The degradation of <em>para</em>-nitrophenol (PNP) pollutant under visible light (ZnCo<sub>2</sub>S<sub>4</sub>/CuO/PMS/Vis) via ZnCo<sub>2</sub>S<sub>4</sub>/CuO heterojunction activated peroxymonosulfate has been investigated in detail. The results indicate that 50 % ZnCo<sub>2</sub>S<sub>4</sub>/CuO performs best under light conditions, and after adding 4 mM PMS, the degradation rate of PNP reaches 98 %. The study systematically examines the effects of important parameters (PMS dosage, pH, and coexisting anions) on PNP degradation and verifies the excellent performance of the photocatalysis-activated PMS system through comparative experiments. Electron paramagnetic resonance (ESR) and free radical quenching experiments revealed that <sup>1</sup>O<sub>2</sub> contributes the most to the degradation performance of PNP.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116146"},"PeriodicalIF":4.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-14DOI: 10.1016/j.jphotochem.2024.116160
Huseyin Gumus
The effectiveness of light-sensitive particle-added composites as alternative materials in the treatment of waste water was investigated. Infrared responsive polyvinylidene membranes were prepared with anchoring the graphite supported silver particles reduced by quince seed extract. X-ray diffractometer, scanning electron microscope and Fourier transform infrared spectroscopy analysis were used to characterize physicochemical and structural properties of composites. Photoluminescence, surface area and contact angle measurements were carried out. The filtration performances of the membranes were tested under infrared light in a continuous flow system. Methyl orange and bovine serum albumin solutions were used as model pollutants. The silver-graphite additive acted as light absorber and energy converter. Owing to the photothermal effect, the water flux, rejection and roughness of the AgNP-G-P membrane improved significantly, and those were recorded as 74.7 L.m−2.h−1.bar−1, 54.6 % and, 75.0, respectively (32.5, 22 and 74.1 %, respectively, for PVDF). The composites almost retained their initial performance after repeated use and did not cause solution leaching. In this study photothermal particles, which are frequently used in medical applications, were successfully adapted to the filtration system. It has the ability to add a specific and new dimension to the protection of the environment by purifying wastewater.
{"title":"Green synthesis of infrared controlled AgNP/graphite/polyvinylidene fluoride composite membranes for removal of organic pollutants","authors":"Huseyin Gumus","doi":"10.1016/j.jphotochem.2024.116160","DOIUrl":"10.1016/j.jphotochem.2024.116160","url":null,"abstract":"<div><div>The effectiveness of light-sensitive particle-added composites as alternative materials in the treatment of waste water was investigated. Infrared responsive polyvinylidene membranes were prepared with anchoring the graphite supported silver particles reduced by quince seed extract. X-ray diffractometer, scanning electron microscope and Fourier transform infrared spectroscopy analysis were used to characterize physicochemical and structural properties of composites. Photoluminescence, surface area and contact angle measurements were carried out. The filtration performances of the membranes were tested under infrared light in a continuous flow system. Methyl orange and bovine serum albumin solutions were used as model pollutants. The silver-graphite additive acted as light absorber and energy converter. Owing to the photothermal effect, the water flux, rejection and roughness of the AgNP-G-P membrane improved significantly, and those were recorded as 74.7 L.m<sup>−2</sup>.h<sup>−1</sup>.bar<sup>−1</sup>, 54.6 % and, 75.0, respectively (32.5, 22 and 74.1 %, respectively, for PVDF). The composites almost retained their initial performance after repeated use and did not cause solution leaching. In this study photothermal particles, which are frequently used in medical applications, were successfully adapted to the filtration system. It has the ability to add a specific and new dimension to the protection of the environment by purifying wastewater.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116160"},"PeriodicalIF":4.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-14DOI: 10.1016/j.jphotochem.2024.116159
Cátia Alexandra Podence Alves , Priscila Hasse Palharim , Bruna Pratto , Andre Luiz da Silva , Douglas Gouvêa , Bruno Ramos
Photocatalytic ammonia synthesis from nitrogen and water presents a promising pathway for decentralized sustainable ammonia production, leveraging the abundant solar energy. In this study, we explore the efficacy of three iron oxide polymorphs – goethite (α-FeO(OH)), magnetite (Fe3O4), and hematite (α-Fe2O3) – as photocatalysts for nitrogen reduction under ultraviolet (UV) light. The materials were synthesized using hydrothermal and polymeric precursor methods, characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), UV–Vis spectroscopy, photoluminescence spectroscopy, and thermal analysis to understand their structural, surface, and optoelectronic properties. Among the materials tested, goethite demonstrated the highest ammonia production rate (20.6 µmol g−1h−1), which we attribute to its larger specific surface area and the stability of its surface hydroxyl groups, which play a critical role in facilitating the protonation and electron transfer necessary for nitrogen reduction. Curiously, magnetite also displayed some activity (10.3 µmol g−1h−1), likely due to the formation of a heterojunction with the co-occurring goethite phase. Hematite showed the fastest area-based production rate (1.05 µmol m−2h−1), suggesting it is the polymorph with highest density of active sites for N2 reduction. This work contributes to the ongoing search for greener and lower-cost alternatives to the Haber-Bosch process, with implications for both agriculture and energy storage.
{"title":"Photocatalytic ammonia synthesis from nitrogen in water using iron oxides: Comparative efficiency of goethite, magnetite, and hematite","authors":"Cátia Alexandra Podence Alves , Priscila Hasse Palharim , Bruna Pratto , Andre Luiz da Silva , Douglas Gouvêa , Bruno Ramos","doi":"10.1016/j.jphotochem.2024.116159","DOIUrl":"10.1016/j.jphotochem.2024.116159","url":null,"abstract":"<div><div>Photocatalytic ammonia synthesis from nitrogen and water presents a promising pathway for decentralized sustainable ammonia production, leveraging the abundant solar energy. In this study, we explore the efficacy of three iron oxide polymorphs – goethite (α-FeO(OH)), magnetite (Fe<sub>3</sub>O<sub>4</sub>), and hematite (α-Fe<sub>2</sub>O<sub>3</sub>) – as photocatalysts for nitrogen reduction under ultraviolet (UV) light. The materials were synthesized using hydrothermal and polymeric precursor methods, characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), UV–Vis spectroscopy, photoluminescence spectroscopy, and thermal analysis to understand their structural, surface, and optoelectronic properties. Among the materials tested, goethite demonstrated the highest ammonia production rate (20.6 µmol g<sup>−1</sup>h<sup>−1</sup>), which we attribute to its larger specific surface area and the stability of its surface hydroxyl groups, which play a critical role in facilitating the protonation and electron transfer necessary for nitrogen reduction. Curiously, magnetite also displayed some activity (10.3 µmol g<sup>−1</sup>h<sup>−1</sup>), likely due to the formation of a heterojunction with the co-occurring goethite phase. Hematite showed the fastest area-based production rate (1.05 µmol m<sup>−2</sup>h<sup>−1</sup>), suggesting it is the polymorph with highest density of active sites for N<sub>2</sub> reduction. This work contributes to the ongoing search for greener and lower-cost alternatives to the Haber-Bosch process, with implications for both agriculture and energy storage.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116159"},"PeriodicalIF":4.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-13DOI: 10.1016/j.jphotochem.2024.116157
Cihat Güleryüz , Sajjad H. Sumrra , Abrar U. Hassan , Ayesha Mohyuddin , Azal S. Waheeb , Masar A. Awad , Ayad R. Jalfan , Sadaf Noreen , Hussein A.K. Kyhoiesh , Islam H. El Azab
We present a synergistic approach to combine Machine Learning (ML), Density Functional Theory (DFT), and molecular descriptor analysis for designing high-performance benzodithiophene (BDT) based chromophores. A dataset of 366 BDT incorporated moieties is compiled from literature while their molecular descriptors are designed by using Python programming language. Linear and Random Forest Regression models produces best results to predict their exciton binding energy (Eb) with their R-Squared (R2) value 0.87 and 0.94 respectively. Their DFT calculations provides additional features, including molecular charges. Their ML models also reveals that their Eb values are a crucial predictor for their photovoltaic (PV) performance as its lower value could facilitate efficient charge carrier separation. For this, their hydrogen bond acceptors (HBA) and topological polar surface area (TPSA) emerges as key descriptors during their regression analysis. Their DFT validation shows negligible differences in their molecular charges to suggest their electron donor/acceptor moieties can significantly impact their chromophore nature. The current research work is helpful for efficiently screening the suitability of organic chromophores for their PV applications through advanced computational tools.
我们提出了一种将机器学习（ML）、密度泛函理论（DFT）和分子描述符分析相结合的协同方法，用于设计基于苯并二噻吩（BDT）的高性能发色团。我们从文献中汇编了一个包含 366 个 BDT 结合分子的数据集，并使用 Python 编程语言设计了它们的分子描述符。线性回归模型和随机森林回归模型在预测它们的激子结合能（Eb）方面取得了最佳结果，其 R 平方（R2）值分别为 0.87 和 0.94。他们的 DFT 计算提供了更多特征，包括分子电荷。他们的 ML 模型还显示，Eb 值是预测其光伏（PV）性能的关键因素，因为较低的 Eb 值可以促进有效的电荷载流子分离。为此，在回归分析过程中，它们的氢键受体（HBA）和拓扑极性表面积（TPSA）成为关键的描述因子。DFT 验证显示，它们的分子电荷差异微乎其微，这表明它们的电子供体/受体分子对其发色团性质有重大影响。目前的研究工作有助于通过先进的计算工具有效筛选出适合光伏应用的有机发色团。
{"title":"A machine learning and DFT assisted analysis of benzodithiophene based organic dyes for possible photovoltaic applications","authors":"Cihat Güleryüz , Sajjad H. Sumrra , Abrar U. Hassan , Ayesha Mohyuddin , Azal S. Waheeb , Masar A. Awad , Ayad R. Jalfan , Sadaf Noreen , Hussein A.K. Kyhoiesh , Islam H. El Azab","doi":"10.1016/j.jphotochem.2024.116157","DOIUrl":"10.1016/j.jphotochem.2024.116157","url":null,"abstract":"<div><div>We present a synergistic approach to combine Machine Learning (ML), Density Functional Theory (DFT), and molecular descriptor analysis for designing high-performance benzodithiophene (BDT) based chromophores. A dataset of 366 BDT incorporated moieties is compiled from literature while their molecular descriptors are designed by using Python programming language. Linear and Random Forest Regression models produces best results to predict their exciton binding energy (Eb) with their R-Squared (R2) value 0.87 and 0.94 respectively. Their DFT calculations provides additional features, including molecular charges. Their ML models also reveals that their E<sub>b</sub> values are a crucial predictor for their photovoltaic (PV) performance as its lower value could facilitate efficient charge carrier separation. For this, their hydrogen bond acceptors (HBA) and topological polar surface area (TPSA) emerges as key descriptors during their regression analysis. Their DFT validation shows negligible differences in their molecular charges to suggest their electron donor/acceptor moieties can significantly impact their chromophore nature. The current research work is helpful for efficiently screening the suitability of organic chromophores for their PV applications through advanced computational tools.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116157"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.jphotochem.2024.116151
Andrea Martinez-Topete , Manuel Robles , Gloria Perez , Fernando Martin-Consuegra , Marta Castellote , Eva Jimenez-Relinque
This work explores the potential application of bismuth oxyiodides as “cool” and photocatalytic materials. The BiOI-orange (microflower) and Bi5O7I-white (microneedle) pigments demonstrated multifunctional properties. The enhanced photocatalytic activity is attributed to their suitable band structures for NOx pollutant degradation. The promising thermal performance compared to the uncoated metal sheets is due to their high NIR reflective and emissivity properties. In contrast, the BiOI-red (stacked-sheet structure) pigment is effective as a “cool” pigment but lacks the optimal band structure and morphology for NOx photocatalytic degradation. Incorporating these pigments into alkyd-resin paint formulations significantly reduced their photocatalytic reactivity, likely due to the degradation of the alkyd resin binder. However, the thermal performance of the paint formulations remained favorable. These results imply that BixOyIz pigments have potential as “cool” pigments for energy-efficient building facade and roof applications. To optimize their photocatalytic performance in resin-based paint formulations, further research is necessary. Exploring alternative inorganic binders is another viable option.
{"title":"Ecofriendly multifunctional bismuth oxyiodides pigment and paint coatings: Photocatalytic and cooling functionalities","authors":"Andrea Martinez-Topete , Manuel Robles , Gloria Perez , Fernando Martin-Consuegra , Marta Castellote , Eva Jimenez-Relinque","doi":"10.1016/j.jphotochem.2024.116151","DOIUrl":"10.1016/j.jphotochem.2024.116151","url":null,"abstract":"<div><div>This work explores the potential application of bismuth oxyiodides as “cool” and photocatalytic materials. The BiOI-orange (microflower) and Bi<sub>5</sub>O<sub>7</sub>I-white (microneedle) pigments demonstrated multifunctional properties. The enhanced photocatalytic activity is attributed to their suitable band structures for NOx pollutant degradation. The promising thermal performance compared to the uncoated metal sheets is due to their high NIR reflective and emissivity properties. In contrast, the BiOI-red (stacked-sheet structure) pigment is effective as a “cool” pigment but lacks the optimal band structure and morphology for NOx photocatalytic degradation. Incorporating these pigments into alkyd-resin paint formulations significantly reduced their photocatalytic reactivity, likely due to the degradation of the alkyd resin binder. However, the thermal performance of the paint formulations remained favorable. These results imply that Bi<sub>x</sub>O<sub>y</sub>I<sub>z</sub> pigments have potential as “cool” pigments for energy-efficient building facade and roof applications. To optimize their photocatalytic performance in resin-based paint formulations, further research is necessary. Exploring alternative inorganic binders is another viable option.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116151"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.jphotochem.2024.116147
Sumayyah Sakauloo , Brian D. Wagner , Amani A. Abdelghani
This paper presents a novel design of three star-shaped molecules linked with 4-chloro-7-nitrobenzofurazan (NBD-Cl), highlighting their unique properties for fluorescence applications. NBD-Cl is a substance that is non-fluorescent until it is bound to different functional groups. The three molecules in the shape of a star were created by connecting various equivalents of NBD-Cl to three different cores. The three molecules are referred to as S-1 (NBD-SR), S-2 (NBD-NHAr), and S-3 (NBD-OAr), which are based on thioether, amine, and ether cores, respectively. In addition, a fourth compound A was studied, where A is a single linear branch which is a precursor to S-3. The chemical structure and physical and spectroscopic properties of these molecules were studied and characterized using 1H NMR, 13C NMR, and IR spectroscopy. UV–visible and luminescence spectrometry techniques were used to explore the unique electronic characteristics of all of the molecules using solvents of differing polarity. The star-shaped molecule S-1 showed a distinct, blue-shifted UV–vis absorption spectrum compared to NBD-Cl and the other compounds, with a wavelength range between 410 and 415 nm. Meanwhile, its emission peaks were like those of the other compounds, falling between 530 and 545 nm. This molecule exhibited the highest Stokes shift, ranging between 110 and 137 nm in different solvents, which is higher than the other molecules being studied. The Stokes shift values for compounds A, S-2, and S-3 range between 60 and 100 nm and the spectra display a red-shifted UV–vis absorption spectrum compared to that of S-1. This study reveals that the fluorescence emission wavelength of S-2 (NBD-NHAr) is the longest among the fluorescence emissions. Interestingly, the fluorescence emission of compounds A and S-3 (NBD-OAr) was unexpectedly higher than S-1, though still lower than S-2. This outcome was surprising as it deviates from previous reports, which indicated that NBD-OR derivatives generally lack significant fluorescence. The observed fluorescence enhancement in compounds A and S-3 suggests a unique interaction between the NBD moiety and the aromatic group, possibly due to electronic effects or structural configuration, leading to a more efficient fluorescence pathway. Additionally, there was a noticeable decrease in relative fluorescence as the solvent’s dielectric constant increased, accompanied by a redshift, with slight deviations in the pattern for some molecules.
{"title":"Exploring unique fluorescence characteristics of novel star-shaped molecules containing NBD fluorophores via different linkages: Distinct results with an aromatic ether linkage","authors":"Sumayyah Sakauloo , Brian D. Wagner , Amani A. Abdelghani","doi":"10.1016/j.jphotochem.2024.116147","DOIUrl":"10.1016/j.jphotochem.2024.116147","url":null,"abstract":"<div><div>This paper presents a novel design of three star-shaped molecules linked with 4-chloro-7-nitrobenzofurazan (NBD-Cl), highlighting their unique properties for fluorescence applications. NBD-Cl is a substance that is non-fluorescent until it is bound to different functional groups. The three molecules in the shape of a star were created by connecting various equivalents of NBD-Cl to three different cores. The three molecules are referred to as <strong>S-1</strong> (NBD-SR), <strong>S-2</strong> (NBD-NHAr), and <strong>S-3</strong> (NBD-OAr), which are based on thioether, amine, and ether cores, respectively. In addition, a fourth compound <strong>A</strong> was studied, where <strong>A</strong> is a single linear branch which is a precursor to <strong>S-3</strong>. The chemical structure and physical and spectroscopic properties of these molecules were studied and characterized using <sup>1</sup>H NMR, <sup>13</sup>C NMR, and IR spectroscopy. UV–visible and luminescence spectrometry techniques were used to explore the unique electronic characteristics of all of the molecules using solvents of differing polarity. The star-shaped molecule <strong>S-1</strong> showed a distinct, blue-shifted UV–vis absorption spectrum compared to NBD-Cl and the other compounds, with a wavelength range between 410 and 415 nm. Meanwhile, its emission peaks were like those of the other compounds, falling between 530 and 545 nm. This molecule exhibited the highest Stokes shift, ranging between 110 and 137 nm in different solvents, which is higher than the other molecules being studied. The Stokes shift values for compounds <strong>A</strong>, <strong>S-2,</strong> and <strong>S-3</strong> range between 60 and 100 nm and the spectra display a red-shifted UV–vis absorption spectrum compared to that of <strong>S-1</strong>. This study reveals that the fluorescence emission wavelength of <strong>S-2</strong> (NBD-NHAr) is the longest among the fluorescence emissions. Interestingly, the fluorescence emission of compounds <strong>A</strong> and <strong>S-3</strong> (NBD-OAr) was unexpectedly higher than <strong>S-1</strong>, though still lower than <strong>S-2</strong>. This outcome was surprising as it deviates from previous reports, which indicated that NBD-OR derivatives generally lack significant fluorescence. The observed fluorescence enhancement in compounds <strong>A</strong> and <strong>S-3</strong> suggests a unique interaction between the NBD moiety and the aromatic group, possibly due to electronic effects or structural configuration, leading to a more efficient fluorescence pathway. Additionally, there was a noticeable decrease in relative fluorescence as the solvent’s dielectric constant increased, accompanied by a redshift, with slight deviations in the pattern for some molecules.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116147"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.jphotochem.2024.116148
Crystal Liu , Katlin Ricks , Muneeb Akhtar , Sergio Mendez , Ian Lian , Zhi-Fo Guo
A “turn-on” fluorescent sensor L was developed for the selective detection of Zn2+ ions in biological settings. This sensor exhibited a specific response to Zn2+ ions, with a detection limit of 39 nM. Analyses through titration and Job’s plot confirmed that the formed complex has a 2:1 stoichiometry (L: Zn2+). The sensor displayed strong selectivity for Zn2+ over other metal ions, demonstrating a robust binding affinity while effectively reducing interference from heavy metals. The identification process was validated by Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance (1H NMR) titrations, mass spectrometry (MS), and Density Functional Theory (DFT) calculations. Maximum fluorescence intensity was achieved upon interaction with Zn2+ ions within a physiological pH range of 7.0–7.5. Moreover, successful imaging experiments in HEK293 cells highlighted the sensor’s potential as a powerful tool for monitoring interactions at the plasma membrane.
{"title":"Highly selective and sensitive N-amidothiourea-based fluorescence chemosensor for detecting Zn2+ ions and cell Imaging: Potential applications for plasma membrane detection","authors":"Crystal Liu , Katlin Ricks , Muneeb Akhtar , Sergio Mendez , Ian Lian , Zhi-Fo Guo","doi":"10.1016/j.jphotochem.2024.116148","DOIUrl":"10.1016/j.jphotochem.2024.116148","url":null,"abstract":"<div><div>A “turn-on” fluorescent sensor <strong>L</strong> was developed for the selective detection of Zn<sup>2+</sup> ions in biological settings. This sensor exhibited a specific response to Zn<sup>2+</sup> ions, with a detection limit of 39 nM. Analyses through titration and Job’s plot confirmed that the formed complex has a 2:1 stoichiometry (<strong>L</strong>: Zn<sup>2+</sup>). The sensor displayed strong selectivity for Zn<sup>2+</sup> over other metal ions, demonstrating a robust binding affinity while effectively reducing interference from heavy metals. The identification process was validated by Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance (<sup>1</sup>H NMR) titrations, mass spectrometry (MS), and Density Functional Theory (DFT) calculations. Maximum fluorescence intensity was achieved upon interaction with Zn<sup>2+</sup> ions within a physiological pH range of 7.0–7.5. Moreover, successful imaging experiments in HEK293 cells highlighted the sensor’s potential as a powerful tool for monitoring interactions at the plasma membrane.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116148"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.jphotochem.2024.116139
J.V. Gutiérrez-Manzanedo , C. Vaz-Pardal , A. Rodríguez-Martínez , J. Aguilera , P. Gutiérrez-Mulas , J.L. González-Montesinos , A. Subert , F. Rivas-Ruiz , M. de Troya-Martín
Background
Outdoor sports are associated with overexposure to solar ultraviolet radiation and sunburn.
Aims
To quantify solar ultraviolet radiation (UVR) exposure received by trail runners during an ultraendurance competition at high altitude and to assess their sun exposure habits, sun protection behaviors, and attitudes and knowledge regarding skin cancer.
Methods
Trail runners taking part in the 2023 Ultra Sierra Nevada race (Spain, April 14–16, 2023) completed an online validated questionnaire on sun-related habits, behaviors, attitudes, and knowledge. Environmental conditions such as temperature, relative humidity, and UVR as well as participants’ personal erythemal dose were measured during the competition.
Results
The average ambient cumulative erythemal dose ranged from 59.9 to 19.3 standard erythemal doses (SED) and the mean effective radiation received by the athletes studied (n = 17) ranged from 24.2 to 7.6 SED in the Extreme (154 km) to Half-Marathon (25.1 km) races. The questionnaire was completed by 194 athletes (mean age 41.3 ± 8.9 years; 76.8 % men). A total of 22.4 % of athletes surveyed reported skin phototype I-II. Two-thirds (66.5 %) had sunburn after doing outdoor sports in the previous year. In regard to photoprotection practices while exercising outdoors, 62.6 % reported wearing a hat/cap, 59.2 % avoided the midday sun, 38.7 % used sunscreen with sun protection factor ≥ 15, and 49.7 % stated they did not reapply sunscreen.
Conclusions
The trail runners studied received a high solar exposure dose during the competition. Future interventions are needed to improve individual and organizational photoprotection measures in trail-running events to reduce the risk of skin cancer.
背景户外运动与过度暴露于太阳紫外线辐射和晒伤有关.Aims To quantify solar ultraviolet radiation (UVR) exposure by trail runners during an ultraendurance competition at high altitude and to assess their sun exposure habits, sun protection behaviors, and attitudes and knowledge regarding skin cancer.方法参加 2023 年内华达山脉超耐力赛（西班牙，2023 年 4 月 14-16 日）的越野跑运动员完成了一份关于与太阳有关的习惯、行为、态度和知识的在线验证问卷。结果在极限马拉松（154 公里）和半程马拉松（25.1 公里）比赛中，平均环境累积红斑剂量介于 59.9 到 19.3 标准红斑剂量（SED）之间，被研究的运动员（n = 17）接受的平均有效辐射介于 24.2 到 7.6 SED 之间。194 名运动员（平均年龄为 41.3 ± 8.9 岁；76.8% 为男性）填写了调查问卷。共有 22.4% 的受访运动员报告了皮肤光型 I-II。三分之二（66.5%）的运动员在去年进行户外运动后曾被晒伤。关于户外运动时的防晒措施，62.6%的人表示戴帽子/帽子，59.2%的人避开正午阳光，38.7%的人使用防晒系数≥15的防晒霜，49.7%的人表示没有重新涂抹防晒霜。今后需要采取干预措施，改善越野跑比赛中个人和组织的光防护措施，以降低患皮肤癌的风险。
{"title":"Solar ultraviolet radiation exposure of trail runners in an ultraendurance competition at high altitude","authors":"J.V. Gutiérrez-Manzanedo , C. Vaz-Pardal , A. Rodríguez-Martínez , J. Aguilera , P. Gutiérrez-Mulas , J.L. González-Montesinos , A. Subert , F. Rivas-Ruiz , M. de Troya-Martín","doi":"10.1016/j.jphotochem.2024.116139","DOIUrl":"10.1016/j.jphotochem.2024.116139","url":null,"abstract":"<div><h3>Background</h3><div>Outdoor sports are associated with overexposure to solar ultraviolet radiation and sunburn.</div></div><div><h3>Aims</h3><div>To quantify solar ultraviolet radiation (UVR) exposure received by trail runners during an ultraendurance competition at high altitude and to assess their sun exposure habits, sun protection behaviors, and attitudes and knowledge regarding skin cancer.</div></div><div><h3>Methods</h3><div>Trail runners taking part in the 2023 Ultra Sierra Nevada race (Spain, April 14–16, 2023) completed an online validated questionnaire on sun-related habits, behaviors, attitudes, and knowledge. Environmental conditions such as temperature, relative humidity, and UVR as well as participants’ personal erythemal dose were measured during the competition.</div></div><div><h3>Results</h3><div>The average ambient cumulative erythemal dose ranged from 59.9 to 19.3 standard erythemal doses (SED) and the mean effective radiation received by the athletes studied (n = 17) ranged from 24.2 to 7.6 SED in the Extreme (154 km) to Half-Marathon (25.1 km) races. The questionnaire was completed by 194 athletes (mean age 41.3 ± 8.9 years; 76.8 % men). A total of 22.4 % of athletes surveyed reported skin phototype I-II. Two-thirds (66.5 %) had sunburn after doing outdoor sports in the previous year. In regard to photoprotection practices while exercising outdoors, 62.6 % reported wearing a hat/cap, 59.2 % avoided the midday sun, 38.7 % used sunscreen with sun protection factor ≥ 15, and 49.7 % stated they did not reapply sunscreen.</div></div><div><h3>Conclusions</h3><div>The trail runners studied received a high solar exposure dose during the competition. Future interventions are needed to improve individual and organizational photoprotection measures in trail-running events to reduce the risk of skin cancer.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116139"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microbial infections, particularly those produced by multidrug-resistant bacteria, are a major risk to global wellness. In place of conventional antibiotics, photothermal therapy (PTT) and photodynamic therapy (PDT) use light-activated antimicrobial agents to transform near-infrared (NIR) light into heat and reactive oxygen species (ROS), respectively, which effectively eradicate pathogens. This study explored the potential of a new organic dye, bis-(borondifluoride)-8-imidazodipyrromethene (BOIMPY), as a NIR PTT/PDT agent. To increase its phototherapy characteristics, triphenylamines (TPA) were conjugated to BOIMPY to yield TPA-BOIMPY, and Pluronic F127 was utilized to improve the hydrophilicity of TPA-BOIMPY by forming TPA-BOIMPY@F127 nanoparticles with an average particle size of 79 nm. These nanoparticles exhibited a maximum absorption peak at 757 nm, a photothermal conversion efficiency of 34 %, a singlet oxygen quantum yield of 0.02, and excellent photostability. Under 808 nm NIR irradiation, TPA-BOIMPY@F127 remarkably reduced the viability of both E. coli and S. aureus to 0.4% and 7.3%, respectively. The exceptional photostability and promising PTT/PDT capabilities of TPA-BOIMPY@F127 highlight its potential as a new class of NIR PTT/PDT agents for combating bacterial infections, contributing to the ongoing development of innovative therapeutic strategies.
{"title":"NIR-induced antimicrobial efficacy of TPA-BOIMPY conjugate through photothermal and photodynamic synergy","authors":"Worakrit Saiyasombat , Sineenat Sripattanakul , Sastiya Kampaengsri , Kantapat Chansaenpak , Rung-Yi Lai , Anyanee Kamkaew","doi":"10.1016/j.jphotochem.2024.116136","DOIUrl":"10.1016/j.jphotochem.2024.116136","url":null,"abstract":"<div><div>Microbial infections, particularly those produced by multidrug-resistant bacteria, are a major risk to global wellness. In place of conventional antibiotics, photothermal therapy (PTT) and photodynamic therapy (PDT) use light-activated antimicrobial agents to transform near-infrared (NIR) light into heat and reactive oxygen species (ROS), respectively, which effectively eradicate pathogens. This study explored the potential of a new organic dye, bis-(borondifluoride)-8-imidazodipyrromethene (BOIMPY), as a NIR PTT/PDT agent. To increase its phototherapy characteristics, triphenylamines (TPA) were conjugated to BOIMPY to yield <strong>TPA-BOIMPY</strong>, and Pluronic F127 was utilized to improve the hydrophilicity of <strong>TPA-BOIMPY</strong> by forming <strong>TPA-BOIMPY@F127</strong> nanoparticles with an average particle size of 79 nm. These nanoparticles exhibited a maximum absorption peak at 757 nm, a photothermal conversion efficiency of 34 %, a singlet oxygen quantum yield of 0.02, and excellent photostability. Under 808 nm NIR irradiation, <strong>TPA-BOIMPY@F127</strong> remarkably reduced the viability of both <em>E. coli</em> and <em>S. aureus</em> to 0.4% and 7.3%, respectively. The exceptional photostability and promising PTT/PDT capabilities of <strong>TPA-BOIMPY@F127</strong> highlight its potential as a new class of NIR PTT/PDT agents for combating bacterial infections, contributing to the ongoing development of innovative therapeutic strategies.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116136"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-10DOI: 10.1016/j.jphotochem.2024.116149
Chiara Ingrosso , Alessia Disha , Massimo Dell’Edera , Ilaria De Pasquale , Giuseppe V. Bianco , Antonella Milella , A. Grandolfo , Ernesto Mesto , Emanuela Schingaro , Marinella Striccoli , Elisabetta Fanizza , Roberto Comparelli , M. Lucia Curri
Hybrid nanocomposites based on 1-pyrene carboxylic acid (PCA) functionalized High Porous Reduced Graphene Oxide (HPRGO) sheets, decorated with oleic acid (OLEA)-coated TiO2 nanocrystals (NCs), have been obtained by means of an in situ colloidal route, starting from titanium isopropoxide (TTIP) precursor, in presence of OLEA surfactant and trimethylamino-N-oxide dihydrate (TMAO) base catalyst. The effect of the synthesis parameters, namely the PCA-HPRGO:TTIP w/w and the OLEA:TTIP molar ratio, on the morphological, spectroscopic and structural properties of the nanocomposites, has been explored, to achieve highly crystalline TiO2 nanostructures, with a reproducible control on morphology and crystalline phase (anatase). The TiO2 NCs have been found to effectively heteronucleate and grow onto the –COOH groups of the PCA molecules anchoring onto the HPRGO basal plane by aromatic π-π stacking interactions. The OLEA ligand coordinating their surface endows the nanocomposites with dispersibility in organic solvents, with a morphology dictated by the PCA coordinating sites, OLEA, and the mode of the TMAO supply to the reaction mixture. A significantly higher coating density has been found for the TiO2 in nanorods (NRs) morphology, which organize in a uniform and high packed layout onto the PCA-HPRGO basal plane. The TiO2 NRs decorated PCA-HPRGO nanocomposites (TiO2 NRs/PCA-HPRGO) have been tested as photocatalysts for the degradation of methyl red (MR) and nalidixic acid (NA) under UV- and solar-light irradiation. Their photocatalytic activity has been evaluated against TiO2 reference and commercial nanostructures and discussed in terms of electronic level alignment between the hybrid nanostructure components, considering the role of the PCA anchoring molecule at the interphase.
{"title":"Photocatalytic nanocomposite based on pyrene functionalized reduced graphene oxide in situ decorated with TiO2 nanorods","authors":"Chiara Ingrosso , Alessia Disha , Massimo Dell’Edera , Ilaria De Pasquale , Giuseppe V. Bianco , Antonella Milella , A. Grandolfo , Ernesto Mesto , Emanuela Schingaro , Marinella Striccoli , Elisabetta Fanizza , Roberto Comparelli , M. Lucia Curri","doi":"10.1016/j.jphotochem.2024.116149","DOIUrl":"10.1016/j.jphotochem.2024.116149","url":null,"abstract":"<div><div>Hybrid nanocomposites based on 1-pyrene carboxylic acid (PCA) functionalized High Porous Reduced Graphene Oxide (HPRGO) sheets, decorated with oleic acid (OLEA)-coated TiO<sub>2</sub> nanocrystals (NCs), have been obtained by means of an <em>in situ</em> colloidal route, starting from titanium isopropoxide (TTIP) precursor, in presence of OLEA surfactant and trimethylamino-N-oxide dihydrate (TMAO) base catalyst. The effect of the synthesis parameters, namely the PCA-HPRGO:TTIP w/w and the OLEA:TTIP molar ratio, on the morphological, spectroscopic and structural properties of the nanocomposites, has been explored, to achieve highly crystalline TiO<sub>2</sub> nanostructures, with a reproducible control on morphology and crystalline phase (anatase). The TiO<sub>2</sub> NCs have been found to effectively heteronucleate and grow onto the –COOH groups of the PCA molecules anchoring onto the HPRGO basal plane by aromatic π-π stacking interactions. The OLEA ligand coordinating their surface endows the nanocomposites with dispersibility in organic solvents, with a morphology dictated by the PCA coordinating sites, OLEA, and the mode of the TMAO supply to the reaction mixture. A significantly higher coating density has been found for the TiO<sub>2</sub> in nanorods (NRs) morphology, which organize in a uniform and high packed layout onto the PCA-HPRGO basal plane. The TiO<sub>2</sub> NRs decorated PCA-HPRGO nanocomposites (TiO<sub>2</sub> NRs/PCA-HPRGO) have been tested as photocatalysts for the degradation of methyl red (MR) and nalidixic acid (NA) under UV- and solar-light irradiation. Their photocatalytic activity has been evaluated against TiO<sub>2</sub> reference and commercial nanostructures and discussed in terms of electronic level alignment between the hybrid nanostructure components, considering the role of the PCA anchoring molecule at the interphase.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"460 ","pages":"Article 116149"},"PeriodicalIF":4.1,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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