Journal of Photochemistry and Photobiology A-chemistry最新文献_第3页

Effect of surface Fe- and Cu-species on the flat-band potential and photoelectrocatalytic properties of N-doped TiO2

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-13 DOI: 10.1016/j.jphotochem.2025.116342

Evgeny Gribov, Evgeny Koshevoy, Timur Fazliev, Mikhail Lyulyukin, Denis Kozlov, Dmitry Selishchev

Surface modification of N-doped TiO₂ photocatalyst with transition metals is regarded as a promising approach to increase its ability in the visible-light driven oxidation of organic compounds. Photoelectrocatalytic characterization of semiconducting materials is useful technique to evaluate the potentials of photogenerated charge carriers for analysis of their transfer and reaction pathways. In this study, the surface of TiO₂-N was decorated with iron or copper species by a simple impregnation method. Fe and Cu were selected as efficient surface traps for electrons and holes, respectively. The metal-decorated photocatalysts were studied using a series of (photo)electrochemical methods with/without addition of methanol as a sacrificial agent to evaluate the position of their flat-band potentials and investigate the effect of metals on the action spectrum of TiO₂-N in the range of 370–500 nm. Comprehensive analysis revealed that the flat-band potentials of Fe- and Cu-modified photocatalysts are similar (−0.30 ÷ −0.32 V vs. RHE) and slightly negative than the potential of initial TiO₂-N (−0.26 V vs. RHE). Furthermore, the modification of TiO₂-N with iron and copper species substantially increased visible-light induced photocurrent in both aqueous and methanol-added electrolytes, especially at long wavelengths. The enhanced photoelectrocatalytic activity of metal-decorated photocatalysts was considered in viewpoint of metal effect on the recombination of photogenerated charge carriers and occurring water or methanol oxidation reactions.

{"title":"Effect of surface Fe- and Cu-species on the flat-band potential and photoelectrocatalytic properties of N-doped TiO2","authors":"Evgeny Gribov, Evgeny Koshevoy, Timur Fazliev, Mikhail Lyulyukin, Denis Kozlov, Dmitry Selishchev","doi":"10.1016/j.jphotochem.2025.116342","DOIUrl":"10.1016/j.jphotochem.2025.116342","url":null,"abstract":"<div><div>Surface modification of N-doped TiO<sub>2</sub> photocatalyst with transition metals is regarded as a promising approach to increase its ability in the visible-light driven oxidation of organic compounds. Photoelectrocatalytic characterization of semiconducting materials is useful technique to evaluate the potentials of photogenerated charge carriers for analysis of their transfer and reaction pathways. In this study, the surface of TiO<sub>2</sub>-N was decorated with iron or copper species by a simple impregnation method. Fe and Cu were selected as efficient surface traps for electrons and holes, respectively. The metal-decorated photocatalysts were studied using a series of (photo)electrochemical methods with/without addition of methanol as a sacrificial agent to evaluate the position of their flat-band potentials and investigate the effect of metals on the action spectrum of TiO<sub>2</sub>-N in the range of 370–500 nm. Comprehensive analysis revealed that the flat-band potentials of Fe- and Cu-modified photocatalysts are similar (−0.30 ÷ −0.32 V vs. RHE) and slightly negative than the potential of initial TiO<sub>2</sub>-N (−0.26 V vs. RHE). Furthermore, the modification of TiO<sub>2</sub>-N with iron and copper species substantially increased visible-light induced photocurrent in both aqueous and methanol-added electrolytes, especially at long wavelengths. The enhanced photoelectrocatalytic activity of metal-decorated photocatalysts was considered in viewpoint of metal effect on the recombination of photogenerated charge carriers and occurring water or methanol oxidation reactions.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116342"},"PeriodicalIF":4.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437270","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}

引用次数: 0

Innovative use of Fe2O3-modified TiO2 coated PE foam for extending the freshness of Barracuda mango

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-12 DOI: 10.1016/j.jphotochem.2025.116341

Peerawas Kongsong , Tada Boonyalak , Waritha Jantaporn , Mahamasuhaimi Masae

Preserving fruits after harvest has been challenging, especially Barracuda mangoes because they are highly perishable produce. This paper takes a novel approach incorporating the use of Fe₂O₃-modified TiO₂ (Fe₂O₃/TiO₂) coated polyethylene (PE) foam fruit nets to enhance the shelf life of those mangoes. Various aspects of the study include identifying characterization techniques used in Fe₂O₃/TiO₂. The synthesized TiO₂ particles were analyzed for particle size distribution and size to get the optimum properties for the coating effectiveness. The study examined the methylene blue (MB) degradation mechanism. A UV–Vis spectrometer was used to determine the optical properties of the Fe₂O₃-modified TiO₂, SEM was used to analyze the surface of the coated PE foam nets, indicating even distribution and strong adhesion of the TiO₂ particles. An energy-dispersive X-ray spectroscopy (EDS) test was performed together with an SEM analysis to determine the content of conductive elements and to ensure that Fe was modified into the TiO₂ structure. This research confirms that Fe₂O₃/TiO₂ coatings effectively increase mangoes’ shelf life through their negative impact on microbial growth and the slowing of other ripening processes. Fe₂O₃/TiO₂ at the maximum concentration of 1.0 % w/v further showed a considerable shelf-life extension of 130.23 % to the control sample without coating. Experimental results revealed that the Fe-modified TiO₂ materials performed better in MB degradation tests than unmodified TiO₂. The study also established that the photocatalytic effect of TiO₂ is improved upon Fe modified because the bandgap is also reduced hence improved antimicrobial efficacy when exposed for a short time under fluorescent light. As a contribution to solving the problem of food waste and disease control in technology after the harvest, this study has identified the possibility of using Fe₂O₃/TiO₂ coatings. Further work should also concentrate on enhancing the use of coating to fit the requirements for large-scale application of this technology.

{"title":"Innovative use of Fe2O3-modified TiO2 coated PE foam for extending the freshness of Barracuda mango","authors":"Peerawas Kongsong , Tada Boonyalak , Waritha Jantaporn , Mahamasuhaimi Masae","doi":"10.1016/j.jphotochem.2025.116341","DOIUrl":"10.1016/j.jphotochem.2025.116341","url":null,"abstract":"<div><div>Preserving fruits after harvest has been challenging, especially Barracuda mangoes because they are highly perishable produce. This paper takes a novel approach incorporating the use of Fe<sub>2</sub>O<sub>3</sub>-modified TiO<sub>2</sub> (Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>) coated polyethylene (PE) foam fruit nets to enhance the shelf life of those mangoes. Various aspects of the study include identifying characterization techniques used in Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>. The synthesized TiO<sub>2</sub> particles were analyzed for particle size distribution and size to get the optimum properties for the coating effectiveness. The study examined the methylene blue (MB) degradation mechanism. A UV–Vis spectrometer was used to determine the optical properties of the Fe<sub>2</sub>O<sub>3</sub>-modified TiO<sub>2</sub>, SEM was used to analyze the surface of the coated PE foam nets, indicating even distribution and strong adhesion of the TiO<sub>2</sub> particles. An energy-dispersive X-ray spectroscopy (EDS) test was performed together with an SEM analysis to determine the content of conductive elements and to ensure that Fe was modified into the TiO<sub>2</sub> structure. This research confirms that Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> coatings effectively increase mangoes’ shelf life through their negative impact on microbial growth and the slowing of other ripening processes. Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> at the maximum concentration of 1.0 % w/v further showed a considerable shelf-life extension of 130.23 % to the control sample without coating. Experimental results revealed that the Fe-modified TiO<sub>2</sub> materials performed better in MB degradation tests than unmodified TiO<sub>2</sub>. The study also established that the photocatalytic effect of TiO<sub>2</sub> is improved upon Fe modified because the bandgap is also reduced hence improved antimicrobial efficacy when exposed for a short time under fluorescent light. As a contribution to solving the problem of food waste and disease control in technology after the harvest, this study has identified the possibility of using Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> coatings. Further work should also concentrate on enhancing the use of coating to fit the requirements for large-scale application of this technology.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"465 ","pages":"Article 116341"},"PeriodicalIF":4.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446003","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}

引用次数: 0

Improvement of efficiency and stability of perovskite solar cells using CTF-0 and combination with anthracene: A computational study

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-12 DOI: 10.1016/j.jphotochem.2025.116337

Vahdat Rafee , Eisa Rahimi , Hossein Tavallali , Rahmatollah Rajabi

The present study investigates the effect of adding one, two, and three anthracene molecules into the CTF-0 molecule, acting as an organic hole-transport material, on the stability, efficiency, photovoltaic properties, and charge transfer in perovskite solar cells. To achieve this, the most suitable computational function was selected by performing Density Functional Theory (DFT) level calculations after studying the absorption spectrum of the CTF-0 molecule and comparing it with experimental results. Features such as the energy bandgap, charge transitions, oscillator strength, absorption spectra, dipole moment, binding energy, density of states, light-harvesting efficiency, fill factor, open-circuit voltage, power conversion efficiency, and other related factors were evaluated upon adding the anthracene molecule to the reference molecule. The results indicated significant improvements in the photovoltaic properties of the cells with the new molecules. Notably, enhancements in the absorption spectra, binding energy values, and other optical properties were observed compared to the reference molecule. To validate these results, further analyses such as density of states and transition density matrix were conducted. The power conversion efficiency (PCE) results were reported as follows: for R 31.38 % in the gas phase and 29.57% in the presence of a solvent; ANT1, 28.88% in the gas phase and 27.07% in the presence of a solvent; for ANT2, 28.20% in the gas phase and 25.93% in the presence of a solvent; and for ANT3, 27.29% in the gas phase and 24.80% in the presence of a solvent. Ultimately, the results suggest that the newly derived molecules hold strong potential for optimizing perovskite solar cell performance.

{"title":"Improvement of efficiency and stability of perovskite solar cells using CTF-0 and combination with anthracene: A computational study","authors":"Vahdat Rafee , Eisa Rahimi , Hossein Tavallali , Rahmatollah Rajabi","doi":"10.1016/j.jphotochem.2025.116337","DOIUrl":"10.1016/j.jphotochem.2025.116337","url":null,"abstract":"<div><div>The present study investigates the effect of adding one, two, and three anthracene molecules into the CTF-0 molecule, acting as an organic hole-transport material, on the stability, efficiency, photovoltaic properties, and charge transfer in perovskite solar cells. To achieve this, the most suitable computational function was selected by performing Density Functional Theory (<em>DFT</em>) level calculations after studying the absorption spectrum of the <em>CTF</em>-<em>0</em> molecule and comparing it with experimental results. Features such as the energy bandgap, charge transitions, oscillator strength, absorption spectra, dipole moment, binding energy, density of states, light-harvesting efficiency, fill factor, open-circuit voltage, power conversion efficiency, and other related factors were evaluated upon adding the anthracene molecule to the reference molecule. The results indicated significant improvements in the photovoltaic properties of the cells with the new molecules. Notably, enhancements in the absorption spectra, binding energy values, and other optical properties were observed compared to the reference molecule. To validate these results, further analyses such as density of states and transition density matrix were conducted. The power conversion efficiency (PCE) results were reported as follows: for R 31.38 % in the gas phase and 29.57% in the presence of a solvent; ANT1, 28.88% in the gas phase and 27.07% in the presence of a solvent; for ANT2, 28.20% in the gas phase and 25.93% in the presence of a solvent; and for ANT3, 27.29% in the gas phase and 24.80% in the presence of a solvent. Ultimately, the results suggest that the newly derived molecules hold strong potential for optimizing perovskite solar cell performance.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"465 ","pages":"Article 116337"},"PeriodicalIF":4.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534115","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}

引用次数: 0

Optimizing solar cell performance: Synthesis, structural, and optical analysis of novel quinolinopyranopyridopyrimidine (QPPP)

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-11 DOI: 10.1016/j.jphotochem.2025.116334

Ibtisam Alali , Al-Shimaa Badran , N. Roushdy , Nadia A.A. Elkanzi , A.A.M. Farag , Magdy A. Ibrahim

In this study, we report the synthesis and characterization of quinolinopyranopyrido-pyrimidine (QPPP, 3) through the reaction of 6-ethyl-4,5-dioxo-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile (1) with thiobarbituric acid (2). Computational studies employing density functional theory (DFT) at the B3LYP/6-311++G(d,p) level were conducted to investigate the stable geometries, molecular electrostatic potential (MEP) surfaces, non-linear optical (NLO) properties, and frontier molecular orbital (FMO) analysis. Theoretical chemical shift values (¹H and ¹³C) and vibrational wavenumber values showed a good correlation with experimental data. An in silico ADMET analysis indicated favorable oral drug-like properties for the studied compounds. Scanning electron microscopy was used to analyze the topography of the QPPP structure, revealing high absorption characteristics with two distinct values of 3.42 and 4.12 eV and a directly allowed energy gap of 3.03 eV. QPPP films exhibited remarkable photoluminescence at 514.18, 595.08, and 710.8 nm, indicating their suitability for optoelectronic applications. Furthermore, the investigation of the J-V characteristics of QPPP film-based devices under various illuminations demonstrated a distinct response to incident light, suggesting potential utility in organic solar cells. The heterojunctions of Au/QPPP/n-Si/In showed a suitable solar cell feature in the dark and under illuminations ranging from 20 mW/cm² to 80 mW/cm². Under illumination, the short-circuit current and open-circuit voltage increased from 0.86 mA to 5.49 mA and from 0.178 V to 0.487 V, respectively. The QPPP-based heterojunction solar cells exhibited noticeable enhancements in both fill factor and solar cell efficiency, reaching approximately 0.36 and 5.6 % under 80 mW/cm², respectively. These findings underscore the potential of QPPP-based materials for use in efficient organic solar cells.

{"title":"Optimizing solar cell performance: Synthesis, structural, and optical analysis of novel quinolinopyranopyridopyrimidine (QPPP)","authors":"Ibtisam Alali , Al-Shimaa Badran , N. Roushdy , Nadia A.A. Elkanzi , A.A.M. Farag , Magdy A. Ibrahim","doi":"10.1016/j.jphotochem.2025.116334","DOIUrl":"10.1016/j.jphotochem.2025.116334","url":null,"abstract":"<div><div>In this study, we report the synthesis and characterization of quinolinopyranopyrido-pyrimidine (QPPP, 3) through the reaction of 6-ethyl-4,5-dioxo-5,6-dihydro-4<em>H</em>-pyrano[3,2-c]quinoline-3-carbonitrile (1) with thiobarbituric acid (2). Computational studies employing density functional theory (DFT) at the B3LYP/6-311++G(d,p) level were conducted to investigate the stable geometries, molecular electrostatic potential (MEP) surfaces, non-linear optical (NLO) properties, and frontier molecular orbital (FMO) analysis. Theoretical chemical shift values (<sup>1</sup>H and <sup>13</sup>C) and vibrational wavenumber values showed a good correlation with experimental data. An in silico ADMET analysis indicated favorable oral drug-like properties for the studied compounds. Scanning electron microscopy was used to analyze the topography of the QPPP structure, revealing high absorption characteristics with two distinct values of 3.42 and 4.12 eV and a directly allowed energy gap of 3.03 eV. QPPP films exhibited remarkable photoluminescence at 514.18, 595.08, and 710.8 nm, indicating their suitability for optoelectronic applications. Furthermore, the investigation of the J-V characteristics of QPPP film-based devices under various illuminations demonstrated a distinct response to incident light, suggesting potential utility in organic solar cells. The heterojunctions of Au/QPPP/n-Si/In showed a suitable solar cell feature in the dark and under illuminations ranging from 20 mW/cm<sup>2</sup> to 80 mW/cm<sup>2</sup>. Under illumination, the short-circuit current and open-circuit voltage increased from 0.86 mA to 5.49 mA and from 0.178 V to 0.487 V, respectively. The QPPP-based heterojunction solar cells exhibited noticeable enhancements in both fill factor and solar cell efficiency, reaching approximately 0.36 and 5.6 % under 80 mW/cm<sup>2</sup>, respectively. These findings underscore the potential of QPPP-based materials for use in efficient organic solar cells.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116334"},"PeriodicalIF":4.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419823","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}

引用次数: 0

A3B type Zn(II) phthalocyanines and porphyrin cocktail dye sensitizers for highly efficient DSSCs

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-10 DOI: 10.1016/j.jphotochem.2025.116333

Şeyma Nur Süerkan , Nuray Arslan , Argun Talat Gökçeören , Soner Çakar , Altuğ Mert Sevim , Ahmet Gül , Mahmut Özacar

Dye-sensitized solar cell (DSSC) technology has recently seen some drastic advancement by new concepts and tailor-made new materials. Phthalocyanines and porphyrins were the most investigated solar sensitive dyes. It has been determined that push–pull phthalocyanines containing carboxylic acid groups are among the promising photosensitizers for dye sensitized solar cells (DSSCs) with their absorption spectra in the NIR region. In particular, carboxylic acid-substituted non-symmetrical metallophthalocyanines appear to be extremely important for electron injection into the TiO₂ conduction band in applications where DSSCs have significant potential to achieve greater efficiency. Zinc phthalocyanines containing these groups appear to be candidate molecules for DSSC. However, there is no apparent research in the literature regarding the syntheses and recommendations on analogues of zinc phthalocyanines containing three t-butylsulfanyl or ferrocenylphenol groups and mono aliphatic or aromatic alkynyl anchoring carboxylic acid groups as sensitizing agents for dye-sensitized solar cells. In this actual paper, zinc phthalocyanines and YD2 porphyrin macrocycles were combined as dye cocktails, to extend and complement the absorbance window of sensitizer dyes in the visible region. Thus, four novel A₃B type non-symmetrical zinc phthalocyanines have been synthesized and characterized via spectroscopic (¹H NMR, FTIR, UV–Vis, MALDI-TOF, etc.), electrochemical (CV, SWV), and molecular (TD-DFT) analysis methods. The reported novel solar sensitive dye-coated cells have been characterized in detail by electrochemical methods i.e., J-V, IPCE and measurements of stability. YD2:ZnPc3 (3:1) cocktail dye yielded the highest conversion efficiency, accomplishing 10.87 % exceeding the respective individual dye counterparts, but also the well-known Ru-based commercial N719 sensitizer’s (8.90 %) solar cell efficiencies.

{"title":"A3B type Zn(II) phthalocyanines and porphyrin cocktail dye sensitizers for highly efficient DSSCs","authors":"Şeyma Nur Süerkan , Nuray Arslan , Argun Talat Gökçeören , Soner Çakar , Altuğ Mert Sevim , Ahmet Gül , Mahmut Özacar","doi":"10.1016/j.jphotochem.2025.116333","DOIUrl":"10.1016/j.jphotochem.2025.116333","url":null,"abstract":"<div><div>Dye-sensitized solar cell (DSSC) technology has recently seen some drastic advancement by new concepts and tailor-made new materials. Phthalocyanines and porphyrins were the most investigated solar sensitive dyes. It has been determined that push–pull phthalocyanines containing carboxylic acid groups are among the promising photosensitizers for dye sensitized solar cells (DSSCs) with their absorption spectra in the NIR region. In particular, carboxylic acid-substituted non-symmetrical metallophthalocyanines appear to be extremely important for electron injection into the TiO<sub>2</sub> conduction band in applications where DSSCs have significant potential to achieve greater efficiency. Zinc phthalocyanines containing these groups appear to be candidate molecules for DSSC. However, there is no apparent research in the literature regarding the syntheses and recommendations on analogues of zinc phthalocyanines containing three t-butylsulfanyl or ferrocenylphenol groups and mono aliphatic or aromatic alkynyl anchoring carboxylic acid groups as sensitizing agents for dye-sensitized solar cells. In this actual paper, zinc phthalocyanines and YD2 porphyrin macrocycles were combined as dye cocktails, to extend and complement the absorbance window of sensitizer dyes in the visible region. Thus, four novel A<sub>3</sub>B type non-symmetrical zinc phthalocyanines have been synthesized and characterized via spectroscopic (<sup>1</sup>H NMR, FTIR, UV–Vis, MALDI-TOF, etc.), electrochemical (CV, SWV), and molecular (TD-DFT) analysis methods. The reported novel solar sensitive dye-coated cells have been characterized in detail by electrochemical methods i.e., J-V, IPCE and measurements of stability. YD2:ZnPc3 (3:1) cocktail dye yielded the highest conversion efficiency, accomplishing 10.87 % exceeding the respective individual dye counterparts, but also the well-known Ru-based commercial N719 sensitizer’s (8.90 %) solar cell efficiencies.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116333"},"PeriodicalIF":4.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378666","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}

引用次数: 0

Probing the interaction of 3-mercaptophenylboronic acid with carbohydrates using quantum dots

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-10 DOI: 10.1016/j.jphotochem.2025.116340

João V.A. de Lima, Francisco P.T. de Melo, Adriana Fontes , Paulo E. Cabral Filho

A fluorescent probe based on quantum dots (QDs) and 3-mercaptophenylboronic acid (MPBA) was applied to study the interaction of MPBA with different carbohydrates. Cadmium telluride (CdTe) QDs functionalized/stabilized with mercaptosuccinic acid (MSA) were conjugated to MPBA using a direct strategy based on the affinity of thiol groups for the nanocrystal semiconductor surface. The conjugation was confirmed through flow cytometry by analyzing the nanosystem interaction with sialic acid (SA) from erythrocyte membranes. The ability of the conjugate to distinguish SA levels was also evaluated using erythrocytes freshly collected (0 days) and stored for different periods (8, 15, and 21 days). Then, the interaction of the QDs-MPBA conjugate, at various pHs, with carbohydrates (glucose, sucrose, xylose, and galactose) was investigated using emission spectroscopy. The capacity of the nanosystem to detect galactose using a fluorescence microplate reader (FMR) was also evaluated. The QDs-MPBA conjugate was able to quantitatively recognize and differentiate SA levels from erythrocyte membranes. Galactose resulted in the highest conjugate fluorescence suppression, enabling its detection. According to the Stern–Volmer model, the quenching was primarily dynamic. Using the FMR, limit of detection (LOD) and limit of quantification (LOQ) for galactose were estimated as 51 and 170 mM, respectively. The conjugate was also able to detect galactose in spiked plasma samples. Therefore, this study demonstrates the potential of the QDs-MPBA nanosystem for optical detection of galactose and for distinguishing SA content in erythrocyte membranes.

{"title":"Probing the interaction of 3-mercaptophenylboronic acid with carbohydrates using quantum dots","authors":"João V.A. de Lima, Francisco P.T. de Melo, Adriana Fontes , Paulo E. Cabral Filho","doi":"10.1016/j.jphotochem.2025.116340","DOIUrl":"10.1016/j.jphotochem.2025.116340","url":null,"abstract":"<div><div>A fluorescent probe based on quantum dots (QDs) and 3-mercaptophenylboronic acid (MPBA) was applied to study the interaction of MPBA with different carbohydrates. Cadmium telluride (CdTe) QDs functionalized/stabilized with mercaptosuccinic acid (MSA) were conjugated to MPBA using a direct strategy based on the affinity of thiol groups for the nanocrystal semiconductor surface. The conjugation was confirmed through flow cytometry by analyzing the nanosystem interaction with sialic acid (SA) from erythrocyte membranes. The ability of the conjugate to distinguish SA levels was also evaluated using erythrocytes freshly collected (0 days) and stored for different periods (8, 15, and 21 days). Then, the interaction of the QDs-MPBA conjugate, at various pHs, with carbohydrates (glucose, sucrose, xylose, and galactose) was investigated using emission spectroscopy. The capacity of the nanosystem to detect galactose using a fluorescence microplate reader (FMR) was also evaluated. The QDs-MPBA conjugate was able to quantitatively recognize and differentiate SA levels from erythrocyte membranes. Galactose resulted in the highest conjugate fluorescence suppression, enabling its detection. According to the Stern–Volmer model, the quenching was primarily dynamic. Using the FMR, limit of detection (LOD) and limit of quantification (LOQ) for galactose were estimated as 51 and 170 mM, respectively. The conjugate was also able to detect galactose in spiked plasma samples. Therefore, this study demonstrates the potential of the QDs-MPBA nanosystem for optical detection of galactose and for distinguishing SA content in erythrocyte membranes.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116340"},"PeriodicalIF":4.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420279","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}

引用次数: 0

Temperature control of the two-photon brightness and excited state properties of diimide dibenzene sulfonic-acid perylene monomers/aggregates in a binary water-dimethyl sulfoxide solvent mixture

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-10 DOI: 10.1016/j.jphotochem.2025.116338

Danyellen D.M. Galindo, Rafael de Q. Garcia, Bruno M. Bassi, Cleber R. Mendonça, Leonardo De Boni

Perylene Diimides (PDIs) are known for their high emission quantum yields and have been used in organic semiconductor and fluorescent probe applications. However, their insolubility in polar solvents, such as water, limits their biological by causing fluorescence-quenching aggregation. To address this, we explored modifications to the PDI structure to enhance solubility. This study focuses on the photophysical properties of Perylene Diimide Dibenzene Sulfonic Acid (PDI BzSA) in different solvent mixtures of Dimethyl Sulfoxide (DMSO) and water. We observed changes from isolated molecules in DMSO to predominantly aggregated forms in water. Using nonlinear optical and ultrafast time-resolved methods, we explored the effects of temperature and solvent composition on the photophysical parameters. Key findings include the solvent environment effect on the excited state and linear optical properties of the monomer, modeled phenomenologically, as well as the aggregation process. We found that the fluorescence quantum yield increased in a 50 % water-DMSO mixture, with quenching at greater water content due to aggregation. Despite the changes in fluorescence yield, two-photon absorption (2PA) cross-sections were minimally impacted by aggregation. Additionally, we demonstrated that temperature can be used to control the two-photon brightness significantly. Ultrafast transient absorption (TA) studies revealed distinct relaxation pathways for monomers and aggregates, with aggregates exhibiting charge transfer features in their excited state absorption spectra. TA anisotropy indicated that aggregates stack in a slightly twisted configuration due to the non-planar sulfonic acid groups.

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引用次数: 0

Multi-array wax paper-based platform for the colorimetric determination of metal ions in human biofluids: Smart wearable optical sensor (SWOS) towards bioanalysis

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-08 DOI: 10.1016/j.jphotochem.2025.116335

Farnaz Bahavarnia , Mohammad Hasanzadeh

Metal ions are needed to keep the human body healthy, as their presence has or can affect vital biological functions in humans and their existence is essential for survival. Current methods for metal ion analysis struggle with challenges such as low sensitivity, lack of selectivity and complex procedures. Therefore, clinicians urgently need an efficient analysis method/technique. In the present study, a new chemosensing method was proposed for the sensitive recognition of Co(II), Cu (II), and Pb (II) ions. In this method, a chemical reaction occurs between metal ions and triangular silver nanoparticles (TA-AgNPs) which served as optical prob, resulting in a color change detected by an engineered colorimetric method. UV–visible spectrophotometry also confirms the reaction, as the interaction between metal ions and TA-AgNPs causes a significant change in the absorption spectrum. This enables the rapid and reliable measurement of these important metal ions with a detection limit of less than 10 nM to 300 mM in human body fluids. Finally, Co(II), Cu (II), and Pb (II) cations were determined by a novel microfluidic chemosensor which engineered by multi-array wax paper-based method. Therefore, a novel portable photo-sensor was developed for the sensitive and specific monitoring of Co(II), Cu (II), and Pb (II) cations in human real samples. In the presence of metal ions, constructed microfluidic paper-based colorimetric devices (μPCDs) work based on color alternation of the sensing probe, such that the blue color of the TA-AgNPrs solution was changed to light orange in the presence of Co(II), and Cu(II) was changed to yellow, Pb(II) was changed to light blue which confirmed suitable application of the engineered platform for the rapid identification of ions. Therefore, an innovative method was suggested for the in-situ and on-demand opto-analysis of metal ions in human urine samples which is expected to help improve environmental health and safety in the workplace.

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引用次数: 0

8-Hydroxyquinoline based novel fluorogenic sensor for Sensitive and selective Cd2+ detection and its Applications: Soil, Foodstuffs, smartphone and living cell

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-08 DOI: 10.1016/j.jphotochem.2025.116336

Meliha Kutluca Alici

Cadmium is extensively utilized in various fields, mostly in industry and agriculture. Cadmium contamination of food, water, and soil can lead to major issues, like metabolic diseases and environmental degradation. The detection of cadmium is important due to these problems. In this study, an uncomplicated, efficient, and reversible fluorogenic sensor, HQM (2-amino-3-(((8-hydroxyquinolin-7-yl)methylene)amino)maleonitrile), composed of 7-formyl-8-hydroxyquinoline linked to diaminomalonitrile, was created for the determination of Cd²⁺. the sensor exhibited high selectivity for Cd²⁺ among various metal ions. The detection limit of HQM for Cd²⁺ was calculated as 0.25 µM. Application experiments on soil, foodstuffs, and living cells demonstrated the effective in-situ detection capabilities of HQM for Cd²⁺, indicating its promising potential for simple, rapid, and in-situ monitoring of Cd²⁺ in solutions.

引用次数: 0

Synthesis, characterization, photocatalytic activity of selenium vacancy in BiSeX and BiSeX/GO (X = Cl、Br、I) photocatalysts

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-02-07 DOI: 10.1016/j.jphotochem.2025.116330

Yu-Yun Lin, Hong-Han Huang, Shiuh-Tsuen Huang, Fu-Yu Liu, Jia-Hao Lin, Chiing-Chang Chen

BiSeX (X = Cl, Br, I) belongs to the V–VI–VII compounds, known for their high dielectric constants, ferroelectric properties, excellent photoconductivity, and well-suited valence bands. In this study, we successfully synthesized a series of BiSeX compounds through a simple hydrothermal method. We then combined varying amounts of graphene oxide (GO) with BiSeX in an autoclave, heating the mixture at 100 °C for 4 h to create the binary composite photocatalyst BiSeX/GO. The resulting products were extensively characterized using XRD, SEM-EDS, DR-UV, GC, BET, PL, UV–Vis-NIR, and HR-XPS techniques. To assess the photocatalytic efficiency of BiSeX and BiSeX/GO, these catalysts were tested for the degradation of the organic pollutant crystal violet (CV), yielding significant outcomes. BiSeCl/GO-25 wt% demonstrated exceptional effectiveness in degrading CV dyes, achieving a maximum reaction rate constant (k) of 0.0465 h⁻¹. Additionally, the photocatalytic conversion of carbon dioxide into chemical fuels offers a promising strategy to tackle escalating environmental issues and holds potential for renewable energy development. Our research revealed that selenium vacancies in BiSeX act as adsorption sites, significantly enhancing electron transfer at the interface, resulting in high activity and selectivity for the carbon dioxide reduction reaction.

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引用次数: 0