Journal of Photochemistry and Photobiology A-chemistry最新文献_第2页

ESIPT-induced intersystem crossing leads to tautomer fluorescence quenching for 3-mercapto-2-(4-(trifluoromethyl)phenyl)-4H-chromen-4-one molecule ESIPT 诱导的系统间交叉导致 3-巯基-2-(4-(三氟甲基)苯基)-4H-苯并吡喃-4-酮分子的同系物荧光淬灭

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-24 DOI: 10.1016/j.jphotochem.2024.116111

{"title":"ESIPT-induced intersystem crossing leads to tautomer fluorescence quenching for 3-mercapto-2-(4-(trifluoromethyl)phenyl)-4H-chromen-4-one molecule","authors":"","doi":"10.1016/j.jphotochem.2024.116111","DOIUrl":"10.1016/j.jphotochem.2024.116111","url":null,"abstract":"<div><div>The excited-state intramolecular proton-transfer (ESIPT) dynamics of 2-(4-(diethylamino)phenyl)-3-mercapto-4H-chromen-4-one (3NTF) and 3-mercapto-2-(4-(trifluoromethyl)phenyl)-4H-chromen-4-one (3FTF) have been investigated using time-dependent density functional theory (TDDFT). Upon photoexcitation, 3NTF exhibits a single fluorescence emission while 3FTF is fluorescence quenched when dissolved in cyclohexane solution. The present study reveals that both species undergo barrierless ESIPT process, and the underlying reason for fluorescence quenching in 3FTF has been elucidated. Specifically, it is concluded that intersystem crossing (ISC) is responsible for the fluorescence quenching in the 3FTF molecule due to the energy gap between the S<sub>1</sub> and T<sub>2</sub> states is only 0.12 eV plus large S<sub>1</sub> → T<sub>2</sub> spin–orbit coupling resulting in a strong interaction between the singlet and triplet states. The present study provides a reference for the fluorescence quenching associated with thiol-hydrogen bond molecules, and it is helpful for further research on ESIPT reactions of sulfur-containing molecules.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539838","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

Visible-light-promoted aerobic synthesis of phenanthridinones from biaryl-2-oxamic acids 双芳基-2-氧肟酸在可见光促进下有氧合成菲啶酮类化合物

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-24 DOI: 10.1016/j.jphotochem.2024.116113

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Chiral discrimination during photoinduced electron transfer from L/D-tryptophan to electron-excited uranyl ion as a part of UO22+ ⊂ α–CD inclusion complex 作为 UO22+ ⊂ α-CD 包合物的一部分，L/D-色氨酸向电子激发铀酰离子的光诱导电子转移过程中的手性判别

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-24 DOI: 10.1016/j.jphotochem.2024.116109

引用次数: 0

Preparation of cysteine-functionalized graphene quantum dots – Zinc phthalocyanines supramolecular hybrid system and their sono-photochemical studies 半胱氨酸功能化石墨烯量子点-酞菁锌超分子杂化体系的制备及其声光化学研究

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-24 DOI: 10.1016/j.jphotochem.2024.116108

{"title":"Preparation of cysteine-functionalized graphene quantum dots – Zinc phthalocyanines supramolecular hybrid system and their sono-photochemical studies","authors":"","doi":"10.1016/j.jphotochem.2024.116108","DOIUrl":"10.1016/j.jphotochem.2024.116108","url":null,"abstract":"<div><div>Current PDT agents often suffer from low singlet oxygen quantum yields, photobleaching, and poor biocompatibility. To address these issues, we propose novel PDT agents that combine the synthesized phthalocyanines with cysteine-functionalized graphene quantum dots (cys-GQDs) for the first time. This combination aims to enhance singlet oxygen production and improve solubility in biological media. In this way, new zinc phthalocyanines with halogen substituents were synthesized for potential use in photodynamic therapy (PDT). Specifically, 2-Bromo-4-methylphenol zinc (II) phthalocyanine (<strong>2a</strong>) and 2-chloro-4-methylphenol zinc(II) phthalocyanine (<strong>2b</strong>) and their graphene quantum dots derivatives were synthesized and characterized. The photochemical, sonochemical, and sono-photochemical properties of these compounds were analyzed, focusing on their efficiency in singlet oxygen production. Our studies of the <strong>2a</strong>@cys-GQDs and <strong>2b</strong>@cys-GQDs conjugates demonstrated higher singlet oxygen yields, suggesting their enhanced potential for clinical applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539840","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

Fluorenyl-corroles: Characterization, photophysical, photobiological, and DNA/BSA-binding properties of novel examples 芴基环：新型化合物的特征、光物理、光生物和 DNA/BSA 结合特性

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-22 DOI: 10.1016/j.jphotochem.2024.116112

{"title":"Fluorenyl-corroles: Characterization, photophysical, photobiological, and DNA/BSA-binding properties of novel examples","authors":"","doi":"10.1016/j.jphotochem.2024.116112","DOIUrl":"10.1016/j.jphotochem.2024.116112","url":null,"abstract":"<div><div>In this study, it was evaluated the photophysical, electrochemical, photobiological, and DNA/BSA-binding properties of fluorenyl corrole derivatives <strong>H<sub>3</sub>MFluCor</strong> and <strong>H<sub>3</sub>TFluCor</strong>. Absorption and emission analyses were corroborated by theoretical calculations performed using time-dependent density functional theory, which revealed natural transition orbitals densities concentrated around the tetrapyrrolic macrocycle in all cases. The experimental studies indicated that the corroles <strong>H<sub>3</sub>MFluCor</strong> and <strong>H<sub>3</sub>TFluCor</strong> are stable in solution and exhibited photostability primarily in DMSO(5%)/Tris-HCl (pH 7.4) buffer. The generation of reactive oxygen species (ROS) and log <em>P</em><sub>OW</sub> values highlight their potential application in photobiological methods, as these corroles effectively generate ROS with more lipophilic characteristics. Furthermore, their binding capacity towards double-stranded DNA and bovine serum albumin (BSA) was also evaluated by spectroscopic techniques and molecular docking calculations. The interactive profile with biomolecules indicates that the corrole derivatives <strong>H<sub>3</sub>MFluCor</strong> and <strong>H<sub>3</sub>TFluCor</strong> tend to binding into the minor grooves of DNA through secondary forces, which are particularly pronounced at site III of the BSA, likely due to the static interactions.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553282","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

Molecular design of −substituted boron difluoride curcuminoids: Tuning luminescence and nonlinear optical properties 二氟化硼姜黄素的分子设计：调谐发光和非线性光学特性

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-22 DOI: 10.1016/j.jphotochem.2024.116110

{"title":"Molecular design of −substituted boron difluoride curcuminoids: Tuning luminescence and nonlinear optical properties","authors":"","doi":"10.1016/j.jphotochem.2024.116110","DOIUrl":"10.1016/j.jphotochem.2024.116110","url":null,"abstract":"<div><div>Boron β-diketonates are prospective fluorescent dyes for functional organic materials to new technologies in the fields of chemistry, NLO-optics, photonics and bio-imaging. The novel NIR-to-NIR luminophors – curcuminoids of boron difluoride with different substituents at the central carbon atom (at the γ-position) of the chelate ring 1,7-bis(4′-N,N′-dimethylaminophenyl)-4-organyl-gept-1,6-dien-3,5-dionate of boron difluoride (<strong>1</strong>–<strong>5</strong>) were synthesized. Luminescence in solutions, crystals and polymer matrices, photobiological properties and NLO properties in polystyrene (PS) and polymethylmethacrylate (PMMA) were studied. The crystal structure has been determined for <strong>1</strong>. For <strong>1</strong>–<strong>5</strong>, in PS film, upon excitation by laser (365 nm), two luminescence bands are observed in the blue (430 nm) and red (650–700 nm) regions of the spectrum. For <strong>1</strong>–<strong>5</strong>, two-photon luminescence is recorded in PS and PMMA films. PS <strong>1</strong> films demonstrate high photostability. The synthesized dyes turned out to be almost non-toxic for HCT116 tumor cells both in a long-term dark experiment (72 h) and after photoexcitation in accordance with absorption maxima in the submicromolar concentration range. The compounds were rapidly accumulated by cells within 3 h, demonstrating cytoplasmic distribution and the potential for use as cellular photoimaging agents. The accumulation of dyes with hydrocarbon γ-substitutes (methyl, <em>iso</em>-propyl, phenyl) after 3 and 24 h is more effective compared to dye 2 (commercial product Cranad-2).</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594057","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

Emission based response of Er3+, Tb3+, and Er3+-Tb3+ co-doped 1393 bioactive glasses along with HPTS towards CO2 基于发射的 Er3+、Tb3+ 和 Er3+-Tb3+ 共掺 1393 生物活性玻璃与 HPTS 对二氧化碳的响应

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-22 DOI: 10.1016/j.jphotochem.2024.116107

{"title":"Emission based response of Er3+, Tb3+, and Er3+-Tb3+ co-doped 1393 bioactive glasses along with HPTS towards CO2","authors":"","doi":"10.1016/j.jphotochem.2024.116107","DOIUrl":"10.1016/j.jphotochem.2024.116107","url":null,"abstract":"<div><div>The HPTS serves as a versatile tool in pH and CO2 sensing studies, as well as in cell biology studies of various processes. However, the long-term photostability of HPTS as a fluorescent dye is an important consideration in its use, especially for long-term applications. In this work, sol–gel synthesized Er<sup>3+</sup>, Tb<sup>3+</sup> and Er<sup>3+</sup>: Tb<sup>3+</sup> co-doped 1393 bioactive glass particles were incorporated with the HPTS in the presence of ionic liquid in an ethyl cellulose matrix. The interaction of the bioactive glasses with the HPTS was investigated by steady-state luminescence and excited-state lifetime measurements. The prepared composites showed linearizable responses when exposed to different CO<sub>2</sub> concentrations. High I<sub>0</sub>/I<sub>100</sub> values (87, 109 and 115) were obtained for the binary blends of HPTS and bioactive glasses. When the imidazolium-based IL was used together with the offered composites, we observed improved stability and longevity for the HPTS up to 315 days. The incorporation of imidazolium-based ionic liquids as additives in HPTS-based fluorescence assays together with the bioactive glasses holds promise for enhancing the photostability of the HPTS and improving the reliability and longevity of fluorescence signals in various research applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539812","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

Decolorization of Acid Red 337 dye with hydroxyl and sulfate radical based advanced oxidation processes using different iron Catalyst: An experimental and statistical Investigation 使用不同铁催化剂的基于羟基和硫酸根自由基的高级氧化工艺对酸性红 337 染料进行脱色：实验和统计调查

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-21 DOI: 10.1016/j.jphotochem.2024.116105

{"title":"Decolorization of Acid Red 337 dye with hydroxyl and sulfate radical based advanced oxidation processes using different iron Catalyst: An experimental and statistical Investigation","authors":"","doi":"10.1016/j.jphotochem.2024.116105","DOIUrl":"10.1016/j.jphotochem.2024.116105","url":null,"abstract":"<div><div>The removal efficiencies of Acid Red 337 dye were investigated by combining advanced oxidation processes based on <img>OH and SO<sub>4</sub><img><sup>−</sup> radicals. The photocatalytic oxidation processes were carried out at the natural pH (5.4) and acidic pH (3.0) values of the dye solution. In the experiments, iron (II) sulfate (Fe<sup>2+</sup>) and potassium ferrioxalate (FeOx) were used as catalysts, hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and peroxymonosulfate (PMS) were used as oxidants to compare dye removal efficiency and to determine the optimum doses. This comparison provided the opportunity to identify suitable catalysts and oxidants for dye removal. Furthermore, time-based comparisons were conducted from 2 to 10 min using the optimum catalyst doses. It was obtained that PMS was more effective as an oxidant in the presence of both iron catalysts for colour removal. The colour removal efficiency of 98.2 % was achieved in the PMS/Fe<sup>2+</sup>/UV process with doses of 1 mM PMS and 0.1 mM Fe<sup>2+</sup> at pH 5.4 and an irradiation time of 10 min. In experiments using light-sensitive ferrioxalate (FeOx), colour removal was achieved in the PMS/FeOx/UV process with an efficiency of 97.8 %. Additionally, an artificial neural networks (ANNs) model effectively optimized the oxidation parameters, with predicted values closely matching the experimental data. The ANNs model yielded excellent statistical performance, with a root mean square error (RMSE) of 0.0317, 0.0223 and coefficient of determination (R<sup>2</sup>) of 0.9690 and 0.9854 for UV/Fe<sup>2+</sup>/H<sub>2</sub>O<sub>2</sub>-UV/FeOx/H<sub>2</sub>O<sub>2</sub> and UV/Fe<sup>2+</sup>/PMS-UV/FeOx/PMS oxidation systems respectively.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539809","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

Dependence of photocatalytic efficiency of titania-carbon nanotube nanocomposites on optoelectrical properties and colloidal stability 二氧化钛-碳纳米管纳米复合材料的光催化效率与光电特性和胶体稳定性的关系

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-20 DOI: 10.1016/j.jphotochem.2024.116101

{"title":"Dependence of photocatalytic efficiency of titania-carbon nanotube nanocomposites on optoelectrical properties and colloidal stability","authors":"","doi":"10.1016/j.jphotochem.2024.116101","DOIUrl":"10.1016/j.jphotochem.2024.116101","url":null,"abstract":"<div><div>The correlation of photocatalytic efficiency of titania–amorphous (nitrogen doped) carbon nanotubes (TiO<sub>2</sub>–a(N)CNT) nanocomposites with colloidal and optoelectrical properties was investigated. TiO<sub>2</sub>–aNCNT and TiO<sub>2</sub>–aCNT exhibited narrow zeta potential variation, high polydispersity index, and large agglomerate sizes across the pH range 1–8. Despite their poor colloidal stability, TiO<sub>2</sub>–aNCNT exhibited superior degradation efficiency for high molecular weight reactive dyes, RR 120 and Remazol brilliant blue (RBB) with 55 mg.L<sup>−1</sup> of RR 120 mineralized under solar irradiation. The photocatalytic performance for TiO<sub>2</sub>–aNCNT and TiO<sub>2</sub>–aCNT correlated with the respective energy band gaps 3.01 and 3.14 eV (respectively) and Ubarch tailing energies. Cyclic voltammetry showed a narrow peak-to-peak separation (<span><math><mrow><mi>Δ</mi><msub><mi>E</mi><mi>p</mi></msub></mrow></math></span>) of 200.7 V (vs Ag/AgCl) for TiO<sub>2</sub>–aNCNT thus confirming enhanced electron transfer kinetics. Electron impedance spectroscopy confirmed low charge transfer resistance for TiO<sub>2</sub>–aNCNT. Herein, it is demonstrated that optoelectrical properties are superior to colloidal stability in driving photocatalytic reactions.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573178","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

Photochemical protonation of an azahelicene in 1,2-dichloroethane 一种氮杂环戊烯在 1,2-二氯乙烷中的光化学质子化反应

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-20 DOI: 10.1016/j.jphotochem.2024.116106

{"title":"Photochemical protonation of an azahelicene in 1,2-dichloroethane","authors":"","doi":"10.1016/j.jphotochem.2024.116106","DOIUrl":"10.1016/j.jphotochem.2024.116106","url":null,"abstract":"<div><div>Heterocyclic analogues of phenanthridine are an important class of nitrogen-containing compounds with promising optical properties including high quantum yield of luminescence, high molar absorption coefficients and sensitivity to solvent medium. The luminescent properties of phenanthridine and its derivatives can be changed by introducing appropriate substituents into various positions of the phenanthridine framework. Recently developed luminescent azahelicenes of furoquinoline series demonstrate strong acidochromic effect both on absorption and emission spectra. One of the features of these compounds is the photochemical formation of a protonated form in chlorine-containing solvents under UV irradiation. In this work we perform a mechanistic study of 3-methoxy-6-(4-methoxyphenyl)naphtho[1′,2′:4,5]furo[2,3-<em>c</em>]quinoline (compound <strong>1</strong>) in 1,2-dichloroethane (1,2-DCE) by means of stationary and laser flash photolysis. In addition to the triplet state formation observed in typical organic solvents photoexcitation in 1,2-DCE was found to result in an electron transfer from the excited compound <strong>1</strong> to a solvent molecule. Reactions of resulting intermediates lead to the formation of the protonated azahelicene. The quantitative mechanism of photoprotonation is put forward.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539810","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