Pub Date : 2025-01-20DOI: 10.1016/j.rechem.2025.102060
Shahrzad Abdolmohammadi , Behrooz Mirza
A suitable and high yield approach for manufacturing of dihydrochromeno[h]chromenes is achieved via the direct assembly of 1,5-dihydroxynaphthalene, aromatic aldehydes, and malononitrile with a molar ratio of 1:2:2, using CuI-graphene nanocomposite as an effective reuseable catalyst in aqueous medium under sonic condition. Several factors, such as ultrasonication power and duration, different solvents, and catalysts, were investigated in order to achieve the optimal processing conditions. This process’s outstanding product yields (85–93 %), rapid reaction time (20 min), reusable catalyst (four times), and ease of operation are its main advantages. It also uses an efficient combination of water as a green solvent and ultrasonic irradiation as an alternative energy source. some of the produced compounds’ antioxidant qualities were also investigated. The test compounds with the greatest antioxidant effects were 4f(C30H20N4O4) and 4e(C32H18N6O2).
{"title":"CuI-Graphene nanocomposite catalyzed synthesis of chromene derivatives under ultrasound irradiation and Evaluation of antioxidant activity","authors":"Shahrzad Abdolmohammadi , Behrooz Mirza","doi":"10.1016/j.rechem.2025.102060","DOIUrl":"10.1016/j.rechem.2025.102060","url":null,"abstract":"<div><div>A suitable and high yield approach for manufacturing of dihydrochromeno[<em>h</em>]chromenes is achieved <em>via</em> the direct assembly of 1,5-dihydroxynaphthalene, aromatic aldehydes, and malononitrile with a molar ratio of 1:2:2, using CuI-graphene nanocomposite as an effective reuseable catalyst in aqueous medium under sonic condition. Several factors, such as ultrasonication power and duration, different solvents, and catalysts, were investigated in order to achieve the optimal processing conditions. This process’s outstanding product yields (85–93 %), rapid reaction time (20 min), reusable catalyst (four times), and ease of operation are its main advantages. It also uses an efficient combination of water as a green solvent and ultrasonic irradiation as an alternative energy source. some of the produced compounds’ antioxidant qualities were also investigated. The test compounds with the greatest antioxidant effects were 4f(C<sub>30</sub>H<sub>20</sub>N<sub>4</sub>O<sub>4</sub>) and 4e(C<sub>32</sub>H<sub>18</sub>N<sub>6</sub>O<sub>2</sub>).</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102060"},"PeriodicalIF":2.5,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current research work describes the preparation and characterizations of a new metal halide hybrid: (C12H14N2O2S)2(FeCl4)1.5(FeCl6)0.5Cl·3H2O Single crystals of the studied sample were grown by the solvent evaporation method. X ray diffraction results reveal that the new hybrid compound crystallizes in the orthorhombic system with Pnma space group. Raman and infrared spectroscopies confirm the presence of the functional groups of organic cations and the anionic entities. The thermal behavior was examined by TGA, DTA and DSC techniques. The UV–visible study of this new compound was also reported and discussed. The molecular arrangement can be described as alternating of organic cations and layers of anions linked together by hydrogen interactions. Hirshfeld surface analysis was carried out also to gain a quantitative overview of the non-covalent interactions. The results show that interactions dominating the structure are the H…Cl/Cl…H and O∙∙∙H/H∙∙∙O (about 67 %). The semiconductor character of this material was confirmed by AC conductivity measurements the values of which are of the order of 10−5 Ω−1cm−1. The low activation energy at low temperatures (0.32 eV) indicates the electronic conduction of this material.
{"title":"Crystal structure, thermal behavior, electric and dielectric properties of a novel organic–inorganic hybrid compound based on iron (III) chloride","authors":"Adel Mahroug , Hasna Ltaief , Mohamed Khitouni , Pavani Krishnapuram , Suresh Kumar , Manual Pedro Fernandes Graça , Mohamed Belhouchet","doi":"10.1016/j.rechem.2025.102053","DOIUrl":"10.1016/j.rechem.2025.102053","url":null,"abstract":"<div><div>The current research work describes the preparation and characterizations of a new metal halide hybrid: (C<sub>12</sub>H<sub>14</sub>N<sub>2</sub>O<sub>2</sub>S)<sub>2</sub>(FeCl<sub>4</sub>)<sub>1.5</sub>(FeCl<sub>6</sub>)<sub>0.5</sub>Cl·3H<sub>2</sub>O Single crystals of the studied sample were grown by the solvent evaporation method. X ray diffraction results reveal that the new hybrid compound crystallizes in the orthorhombic system with Pnma space group. Raman and infrared spectroscopies confirm the presence of the functional groups of organic cations and the anionic entities. The thermal behavior was examined by TGA, DTA and DSC techniques. The UV–visible study of this new compound was also reported and discussed. The molecular arrangement can be described as alternating of organic cations and layers of anions linked together by hydrogen interactions. Hirshfeld surface analysis was carried out also to gain a quantitative overview of the non-covalent interactions. The results show that interactions dominating the structure are the H…Cl/Cl…H and O∙∙∙H/H∙∙∙O (about 67 %). The semiconductor character of this material was confirmed by AC conductivity measurements the values of which are of the order of 10<sup>−5</sup> Ω<sup>−1</sup>cm<sup>−1</sup>. The low activation energy at low temperatures (0.32 eV) indicates the electronic conduction of this material.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102053"},"PeriodicalIF":2.5,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-18DOI: 10.1016/j.rechem.2025.102054
Zahra Khalifeh, Hamid Reza Rajabi, Ali Gorjizadeh Kohvade, Ardeshir Shokrollahi
In this research, the ultrasound-assisted liquid-phase microextraction (US-LPME) method based on the deep eutectic solvent (DES) was performed for preconcentration and extraction of Victoria Blue R (VBR) dye in water samples. In the US-LPME-DES method, a 1:1 ratio of choline chloride and oxalic acid (ChCl: OA) as the DES was optimized in the extraction process. The effect of analytical parameters on the extraction efficiency was studied and optimized using a response surface methodology based on experimental design. A central composite design (CCD) was employed to optimize the main parameters, including the initial pH of the aqueous dye solution, and the volume of DES and diluent. The quantitative determination of the extracted VBR was performed using both spectrophotometry and smartphone imaging (SPI) techniques. The method demonstrates excellent linearity (0.010–3.0 and 0.01–4.0 mg/L), high coefficient determination (R2 = 0.9996 and 0.9985), and low detection limits (3.0 and 4.2 µg/L) using both spectrophotometry and SPI. In the selectivity tests of the method, the presence of various ions and dyes doesn’t show significant interference in the selective determination of VBR. The US-LPME-DES method was successfully applied to recover VBR from various water samples, too. The acceptable precision, accuracy, and efficiency confirmed the applicability of the present method for real sample analysis.
{"title":"Determination of Victoria blue in water samples using ultrasound-assisted liquid-phase microextraction based on deep eutectic solvents: A comparative study of spectrophotometric and smartphone imaging techniques","authors":"Zahra Khalifeh, Hamid Reza Rajabi, Ali Gorjizadeh Kohvade, Ardeshir Shokrollahi","doi":"10.1016/j.rechem.2025.102054","DOIUrl":"10.1016/j.rechem.2025.102054","url":null,"abstract":"<div><div>In this research, the ultrasound-assisted liquid-phase microextraction (US-LPME) method based on the deep eutectic solvent (DES) was performed for preconcentration and extraction of Victoria Blue R (VBR) dye in water samples. In the US-LPME-DES method, a 1:1 ratio of choline chloride and oxalic acid (ChCl: OA) as the DES was optimized in the extraction process. The effect of analytical parameters on the extraction efficiency was studied and optimized using a response surface methodology based on experimental design. A central composite design (CCD) was employed to optimize the main parameters, including the initial pH of the aqueous dye solution, and the volume of DES and diluent. The quantitative determination of the extracted VBR was performed using both spectrophotometry and smartphone imaging (SPI) techniques. The method demonstrates excellent linearity (0.010–3.0 and 0.01–4.0 mg/L), high coefficient determination (R<sup>2</sup> = 0.9996 and 0.9985), and low detection limits (3.0 and 4.2 µg/L) using both spectrophotometry and SPI. In the selectivity tests of the method, the presence of various ions and dyes doesn’t show significant interference in the selective determination of VBR. The US-LPME-DES method was successfully applied to recover VBR from various water samples, too. The acceptable precision, accuracy, and efficiency confirmed the applicability of the present method for real sample analysis.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102054"},"PeriodicalIF":2.5,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.rechem.2024.101914
Martina Cazzolaro, Jia Yang, De Chen
This study proposes the impregnation of silica gel with copper acetate dissolved in water as a valid alternative for the preparation of catalysts for hydrogenation of oxygenates. Copper precursors demonstrated a significant impact on the catalytic properties of the samples here prepared. Moreover, the use of copper acetate in combination with water as impregnation solvent led to the highest activity among the samples presented in this work, suggesting a role of solvent polarity. Characterization by TPR allowed the identification of an unexpected consumption of hydrogen per copper atom, which was associated to the ability to localize hydrogen. The presence of ions in the samples was investigated by CO chemisorption, N2O reactive frontal chromatography and XPS. However, no evidence of its impact on the activity was established.
{"title":"Exploring the influence of copper precursors and solvents on catalyst performance in the hydrogenation of hydroxyacetone to 1,2-Propanediol","authors":"Martina Cazzolaro, Jia Yang, De Chen","doi":"10.1016/j.rechem.2024.101914","DOIUrl":"10.1016/j.rechem.2024.101914","url":null,"abstract":"<div><div>This study proposes the impregnation of silica gel with copper acetate dissolved in water as a valid alternative for the preparation of catalysts for hydrogenation of oxygenates. Copper precursors demonstrated a significant impact on the catalytic properties of the samples here prepared. Moreover, the use of copper acetate in combination with water as impregnation solvent led to the highest activity among the samples presented in this work, suggesting a role of solvent polarity. Characterization by TPR allowed the identification of an unexpected consumption of hydrogen per copper atom, which was associated to the ability to localize hydrogen. The presence of <span><math><msup><mrow><mi>Cu</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span> ions in the samples was investigated by CO chemisorption, N<sub>2</sub>O reactive frontal chromatography and XPS. However, no evidence of its impact on the activity was established.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 101914"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We analyzed the structure of the double perovskite Cs2AgBiBr6 utilizing Density Functional Theory (DFT), adding different doping concentrations of the Sb atom (Cs2AgBi1-x SbxBr6, with x = 0.0625, 0.125, 0.1875). The investigation concentrated on the electronic structure of both pure and doped configurations, emphasizing the total density of states (TDOS) and the atomic orbital densities for each structure. The pure structure exhibits a maximum absorption coefficient of 7.65 × 104 cm−1 at a wavelength of 285 nm. Furthermore, we assessed multiple optical properties including reflectivity (R), absorption coefficient (α), refractive index (n*), dielectric function (ε), optical conductivity (σ), and loss function L(ω). The findings demonstrate that Sb doping diminishes the bandgap energy and increases the absorption coefficient in the visible spectrum. The enhancements indicate that Sb-doped Cs2AgBiBr6 hold significant potential for photovoltaic (PV) applications.
{"title":"Theoretical study of the Sb-substitution effect on the optoelectronic properties of Cs2AgBiBr6 double perovskite","authors":"Lhouceine Moulaoui , Abdelhafid Najim , Marouane Archi , Mohamed Al-Hattab , Omar Bajjou , Anass Bakour , Youssef Lachtioui , Khalid Rahmani , Bouzid Manaut","doi":"10.1016/j.rechem.2025.102025","DOIUrl":"10.1016/j.rechem.2025.102025","url":null,"abstract":"<div><div>We analyzed the structure of the double perovskite Cs<sub>2</sub>AgBiBr<sub>6</sub> utilizing Density Functional Theory (DFT), adding different doping concentrations of the Sb atom (Cs<sub>2</sub>AgBi<sub>1-x</sub> Sb<sub>x</sub>Br<sub>6</sub>, with x = 0.0625, 0.125, 0.1875). The investigation concentrated on the electronic structure of both pure and doped configurations, emphasizing the total density of states (TDOS) and the atomic orbital densities for each structure. The pure structure exhibits a maximum absorption coefficient of 7.65 × 10<sup>4</sup> cm<sup>−1</sup> at a wavelength of 285 nm. Furthermore, we assessed multiple optical properties including reflectivity (R), absorption coefficient (α), refractive index (n*), dielectric function (ε), optical conductivity (σ), and loss function L(ω). The findings demonstrate that Sb doping diminishes the bandgap energy and increases the absorption coefficient in the visible spectrum. The enhancements indicate that Sb-doped Cs<sub>2</sub>AgBiBr<sub>6</sub> hold significant potential for photovoltaic (PV) applications.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 102025"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Oxidative stress (OS) is an imbalance between ROS and antioxidants which is caused by increased synthesis and buildup of reactive oxygen species as well as a reduced ability to detoxify them. It contributes to the onset and progression of chronic inflammation, cancers, diabetes mellitus, atherosclerosis, Alzheimer’s disease, ocular disease, nephropathy, and premature aging. The molecules known as antioxidants contribute significantly to both the prevention and exaggeration of ailments. In the present study, heterocyclic ethyl esters of 2-oxo-1,2,3,4-tetrahydropyrimidines 1–25 were assessed for their antioxidant activity by employing two robust in vitro bioassays; superoxide anion, and DPPH radical scavenging assays. Cytotoxicity was also performed to evaluate the cytotoxicity on PC3 cells. Out of twenty-five, twenty-two compounds exhibited IC50 values in the range of 3.32 ± 0.08 – 167 ± 0.7 µM in superoxide anion assay. Compound 2 (IC50 = 3.32 ± 0.08 µM) remained the most potent as compared to quercetin dihydrate (IC50 = 94.1 ± 1.1 µM). Whereas, compound 10, possessing a catechol moiety was identified as an excellent dual radical scavenger. Hence, this study identified 2-oxo-1,2,3,4-tetrahydropyrimidines ethyl esters as non-cytotoxic, potent ROS scavengers that can be studied further to treat oxidative stress and related pathologies.
{"title":"Antioxidant and cytotoxic activities of 2-oxo-1,2,3,4-tetrahydropyrimidines","authors":"Sarosh Iqbal , Shahida Perveen , M. Iqbal Choudhary , Musarrat Jabeen , Shumaila Kiran , Faiza Qayyum , Khalid Mohammed Khan","doi":"10.1016/j.rechem.2024.101891","DOIUrl":"10.1016/j.rechem.2024.101891","url":null,"abstract":"<div><div>Oxidative stress (OS) is an imbalance between ROS and antioxidants which is caused by increased synthesis and buildup of reactive oxygen species as well as a reduced ability to detoxify them. It contributes to the onset and progression of chronic inflammation, cancers, diabetes mellitus, atherosclerosis, Alzheimer’s disease, ocular disease, nephropathy, and premature aging. The molecules known as antioxidants contribute significantly to both the prevention and exaggeration of ailments. In the present study, heterocyclic ethyl esters of 2-oxo-1,2,3,4-tetrahydropyrimidines <strong>1</strong>–<strong>25</strong> were assessed for their antioxidant activity by employing two robust <em>in vitro</em> bioassays; superoxide anion, and DPPH radical scavenging assays. Cytotoxicity was also performed to evaluate the cytotoxicity on PC3 cells. Out of twenty-five, twenty-two compounds exhibited IC<sub>50</sub> values in the range of 3.32 ± 0.08 – 167 ± 0.7 µM in superoxide anion assay. Compound <strong>2</strong> (IC<sub>50</sub> = 3.32 ± 0.08 µM) remained the most potent as compared to quercetin dihydrate (IC<sub>50</sub> = 94.1 ± 1.1 µM). Whereas, compound <strong>10,</strong> possessing a catechol moiety was identified as an excellent dual radical scavenger. Hence, this study identified 2-oxo-1,2,3,4-tetrahydropyrimidines ethyl esters as non-cytotoxic, potent ROS scavengers that can be studied further to treat oxidative stress and related pathologies.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 101891"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Titanium dioxide (TiO2) thin films exhibit encouraging photocatalytic activity for the degradation of dyes, organic compounds, and biological contaminants. These thin films were obtained using the sol–gel method to prevent issues related to the leaching and separation of TiO2 powder. Therefore, this technique could be effective for treating large volumes of wastewater generated by the textile and refining finishing industries. Typically, these wastewater streams contain heavy metals, which can hinder the process of photodegradation. Transition metals often participate in this procedure, allowing them to adsorb onto the surface of the photocatalyst and modify its photocatalytic performance. Consequently, this study investigated the effects of doping TiO2 with copper, nickel, and zinc. The impact of doping TiO2 with Cu, Ni, and Zn was examined by considering the morphology, visible light response, corrosion and photocorrosion performance, and photocatalytic activity. Grazing incidence X-ray diffraction (GIXRD) results show that dopants are uniformly distributed in the form of oxide states. Morphology and wettability tests indicate that the addition of dopants into TiO2 thin films can develop compact structures with a lower crystallite size, improved surface area, and hydrophilic surfaces. The Cu, Ni, and Zn doping coatings show increased visible light absorption, with the band gap decreasing from 3.05 to 2.3, 2.8, and 2.85 eV, respectively. The maximum photocurrent density is observed for a Zn-doped TiO2 photoelectrode, which facilitates greater light energy utilization for photocatalytic performance. Corrosion measurements under dark and light conditions for doped TiO2 coatings exhibited contrasting activities, suggesting high electrical conductivity under light illumination.
{"title":"Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings","authors":"Mona Khalaghi , Masoud Atapour , Mohamad Mohsen Momeni , Mohammad Reza Karampoor","doi":"10.1016/j.rechem.2025.102032","DOIUrl":"10.1016/j.rechem.2025.102032","url":null,"abstract":"<div><div>Titanium dioxide (TiO<sub>2</sub>) thin films exhibit encouraging photocatalytic activity for the degradation of dyes, organic compounds, and biological contaminants. These thin films were obtained using the sol–gel method to prevent issues related to the leaching and separation of TiO<sub>2</sub> powder. Therefore, this technique could be effective for treating large volumes of wastewater generated by the textile and refining finishing industries. Typically, these wastewater streams contain heavy metals, which can hinder the process of photodegradation. Transition metals often participate in this procedure, allowing them to adsorb onto the surface of the photocatalyst and modify its photocatalytic performance. Consequently, this study investigated the effects of doping TiO<sub>2</sub> with copper, nickel, and zinc. The impact of doping TiO<sub>2</sub> with Cu, Ni, and Zn was examined by considering the morphology, visible light response, corrosion and photocorrosion performance, and photocatalytic activity. Grazing incidence X-ray diffraction (GIXRD) results show that dopants are uniformly distributed in the form of oxide states. Morphology and wettability tests indicate that the addition of dopants into TiO<sub>2</sub> thin films can develop compact structures with a lower crystallite size, improved surface area, and hydrophilic surfaces. The Cu, Ni, and Zn doping coatings show increased visible light absorption, with the band gap decreasing from 3.05 to 2.3, 2.8, and 2.85 eV, respectively. The maximum photocurrent density is observed for a Zn-doped TiO<sub>2</sub> photoelectrode, which facilitates greater light energy utilization for photocatalytic performance. Corrosion measurements under dark and light conditions for doped TiO<sub>2</sub> coatings exhibited contrasting activities, suggesting high electrical conductivity under light illumination.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 102032"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.rechem.2024.102007
Abdullah H. Alluhayb , Alaa M. Younis , Ahmad O. Babalghith , Alaa S. Amin
A sustainable method is investigated for the accurate, selective, and highly sensitive identification of minimal nickel ion concentrations across various environments. A unique optical sensing membrane is proposed for detecting Ni2+ ions, utilizing the entrapment of 5-(2-benzothiazolylazo)-8-hydroxy-quinoline (BTAHQ) within a matrix of polyvinyl chloride (PVC) combined with dioctyl adipate (DOA). The sensor exhibits a broad linear span ranging from 2.5 to 110 ng mL−1 under pH 4.0 conditions, featuring quantification and detection limits of 2.47 and 0.75 ng mL−1, respectively. The sensor’s maximum wavelength is recorded at 659 nm. Remarkably, the sensor membrane exhibits complete reversibility in its operation, showcasing superior specificity for Ni2+ ions even in the presence of a wide range of competing cations and anions within the solution. The membrane exhibited excellent durability for 3.0 min, featured a swift response time (5.0 min), and demonstrated no detectable signs of reagent leaching. The sensor response exhibited a low coefficient of variation (CV) of 1.47 % for 60 ng mL−1 of Ni2+ ions, and the CV among seven sensor membranes was 1.63 %. Regenerating the sensor is a straightforward process accomplished with 0.5 mL of 0.1 M HNO3 solution for 3.0 min. Its full reversibility and excellent selectivity for Ni2+ ions in thiel buffer contribute to its efficacy. The suggested optical sensor was effectively employed for nickel determination in food and water samples.
{"title":"Eco-friendly optical sensor membrane for nickel ion detection in water and food samples","authors":"Abdullah H. Alluhayb , Alaa M. Younis , Ahmad O. Babalghith , Alaa S. Amin","doi":"10.1016/j.rechem.2024.102007","DOIUrl":"10.1016/j.rechem.2024.102007","url":null,"abstract":"<div><div>A sustainable method is investigated for the accurate, selective, and highly sensitive identification of minimal nickel ion concentrations across various environments. A unique optical sensing membrane is proposed for detecting Ni<sup>2+</sup> ions, utilizing the entrapment of 5-(2-benzothiazolylazo)-8-hydroxy-quinoline (BTAHQ) within a matrix of polyvinyl chloride (PVC) combined with dioctyl adipate (DOA). The sensor exhibits a broad linear span ranging from 2.5 to 110 ng mL<sup>−1</sup> under pH 4.0 conditions, featuring quantification and detection limits of 2.47 and 0.75 ng mL<sup>−1</sup>, respectively. The sensor’s maximum wavelength is recorded at 659 nm. Remarkably, the sensor membrane exhibits complete reversibility in its operation, showcasing superior specificity for Ni2<sup>+</sup> ions even in the presence of a wide range of competing cations and anions within the solution. The membrane exhibited excellent durability for 3.0 min, featured a swift response time (5.0 min), and demonstrated no detectable signs of reagent leaching. The sensor response exhibited a low coefficient of variation (CV) of 1.47 % for 60 ng mL<sup>−1</sup> of Ni<sup>2+</sup> ions, and the CV among seven sensor membranes was 1.63 %. Regenerating the sensor is a straightforward process accomplished with 0.5 mL of 0.1 M HNO<sub>3</sub> solution for 3.0 min. Its full reversibility and excellent selectivity for Ni<sup>2+</sup> ions in thiel buffer contribute to its efficacy. The suggested optical sensor was effectively employed for nickel determination in food and water samples.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 102007"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study involved the synthesis and catalytic activity testing of new nanocomposite beads (CuO-Fe2O3/CA-CMC-Cs) prepared by facile and environmentally friendly approach. CuO-Fe2O3 was prepared and applied for the catalytic reduction of 4-nitrophenol (4-NP). The results showed that CuO-Fe2O3 demonstrate high catalytic activity toward the reduction of 4-NP to 4-aminophenol (4-AP). Further, CuO-Fe2O3 were well-dispersed in the polymeric matrix of CA-CMC-Cs to prepare CuO-Fe2O3/CA-CMC-Cs beads via crosslinker agent (AlCl3). CuO-Fe2O3/CA-CMC-Cs beads were also applied for the catalytic reduction of nitrophenol isomers (4-NP, 2-NP, and 2,6-DNP), organic dyes (methyl orange (MO), eosin yellow (EY)) and potassium hexacyanoferrate (K3[Fe(CN)6]). K3[Fe(CN)6] was found to be effectively reduced by the beads and was completed within 30 s. While the catalytic reduction of 4-NP, EY and MO were completed within 300, 240 and 180 s and the rate constants were discovered to be 1.16 × 10−2 s−1, 1.68 × 10−2 s−1 and 1.51 × 10−2 s−1, respectively. The CuO-Fe2O3/CA-CMC-Cs beads catalytic activity was enhanced utilizing 4-NP as a model molecule. The beads had good catalytic activity and may be reused up to three times before losing their effectiveness. Additionally, the ability of the CuO-Fe2O3/CA-CMC-Cs beads to reduce 4-NP and MO in real samples such as wastewater, orange juice and strawberry juice was investigated where the reduction percentage was 91.5 %–89.0 % in the real samples. The results demonstrated that the beads were more efficient for reduction of 4-NP and MO in milk, while, in juices required more time and had a lower reduction percentage.
{"title":"CuO-Fe2O3/calcium alginate-carboxymethylcellulose-chitosan as efficient nanocomposite beads for catalytic reduction of water pollutants","authors":"Nujud Maslamani , Sher Bahadar Khan , Esraa M. Bakhsh , Kalsoom Akhtar , Metab Alharbi","doi":"10.1016/j.rechem.2024.101936","DOIUrl":"10.1016/j.rechem.2024.101936","url":null,"abstract":"<div><div>This study involved the synthesis and catalytic activity testing of new nanocomposite beads (CuO-Fe<sub>2</sub>O<sub>3</sub>/CA-CMC-Cs) prepared by facile and environmentally friendly approach. CuO-Fe<sub>2</sub>O<sub>3</sub> was prepared and applied for the catalytic reduction of 4-nitrophenol (4-NP). The results showed that CuO-Fe<sub>2</sub>O<sub>3</sub> demonstrate high catalytic activity toward the reduction of 4-NP to 4-aminophenol (4-AP). Further, CuO-Fe<sub>2</sub>O<sub>3</sub> were well-dispersed in the polymeric matrix of CA-CMC-Cs to prepare CuO-Fe<sub>2</sub>O<sub>3</sub>/CA-CMC-Cs beads via crosslinker agent (AlCl<sub>3</sub>). CuO-Fe<sub>2</sub>O<sub>3</sub>/CA-CMC-Cs beads were also applied for the catalytic reduction of nitrophenol isomers (4-NP, 2-NP, and 2,6-DNP), organic dyes (methyl orange (MO), eosin yellow (EY)) and potassium hexacyanoferrate (K<sub>3</sub>[Fe(CN)<sub>6</sub>]). K<sub>3</sub>[Fe(CN)<sub>6</sub>] was found to be effectively reduced by the beads and was completed within 30 s. While the catalytic reduction of 4-NP, EY and MO were completed within 300, 240 and 180 s and the rate constants were discovered to be 1.16 × 10<sup>−2</sup> s<sup>−1</sup>, 1.68 × 10<sup>−2</sup> s<sup>−1</sup> and 1.51 × 10<sup>−2</sup> s<sup>−1</sup>, respectively. The CuO-Fe<sub>2</sub>O<sub>3</sub>/CA-CMC-Cs beads catalytic activity was enhanced utilizing 4-NP as a model molecule. The beads had good catalytic activity and may be reused up to three times before losing their effectiveness. Additionally, the ability of the CuO-Fe<sub>2</sub>O<sub>3</sub>/CA-CMC-Cs beads to reduce 4-NP and MO in real samples such as wastewater, orange juice and strawberry juice was investigated where the reduction percentage was 91.5 %–89.0 % in the real samples. The results demonstrated that the beads were more efficient for reduction of 4-NP and MO in milk, while, in juices required more time and had a lower reduction percentage.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 101936"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.rechem.2024.101973
Arunima Verma , Kumud Bhushan , Harwinder Singh
The ability of self-healing materials to detect damage and “autonomously” repair it has garnered significant attention in recent decades. This review explores the critical role of nanomaterials and nanostructures in enhancing the healing process, owing to their extensive surface area, abundant functional groups, and unique properties. From a historical perspective, it traces key developments in the design philosophy behind polymer self-healing and provides a comprehensive overview of recent advancements that leverage nanotechnology to improve healing efficiency and introduce novel functionalities. The literature is categorized into three main areas: (i) Material damage causes, typical repairs, and self-healing benefits, (ii) material properties essential for self-healing evaluation, (iii) characterization methods used to assess the healing capacity of these systems. Advanced techniques are discussed to elucidate micro- and nanoscale interactions at polymer interfaces, emphasizing their role in improving self-healing mechanisms. This review concludes by highlighting the practical implications of these advancements and outlining future directions for research, underscoring their potential to revolutionize the development of durable, multifunctional materials for real-world applications.
{"title":"Nanocomposites for extrinsic self-healing polymer Materials: A comprehensive review of their repair behaviour","authors":"Arunima Verma , Kumud Bhushan , Harwinder Singh","doi":"10.1016/j.rechem.2024.101973","DOIUrl":"10.1016/j.rechem.2024.101973","url":null,"abstract":"<div><div>The ability of self-healing materials to detect damage and “autonomously” repair it has garnered significant attention in recent decades. This review explores the critical role of nanomaterials and nanostructures in enhancing the healing process, owing to their extensive surface area, abundant functional groups, and unique properties. From a historical perspective, it traces key developments in the design philosophy behind polymer self-healing and provides a comprehensive overview of recent advancements that leverage nanotechnology to improve healing efficiency and introduce novel functionalities. The literature is categorized into three main areas: (i) Material damage causes, typical repairs, and self-healing benefits, (ii) material properties essential for self-healing evaluation, (iii) characterization methods used to assess the healing capacity of these systems. Advanced techniques are discussed to elucidate micro- and nanoscale interactions at polymer interfaces, emphasizing their role in improving self-healing mechanisms. This review concludes by highlighting the practical implications of these advancements and outlining future directions for research, underscoring their potential to revolutionize the development of durable, multifunctional materials for real-world applications.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 101973"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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