Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Light-driven mechanical motion of a two-dimensional network of polyfluorinated surfactants having azobenzene moiety sandwiched by niobate nanosheets: Effect of pH of intercalation solution","authors":"Yu Nabetani ,&nbsp;Syed Zahid Hassan ,&nbsp;Kazuki Koganemaru ,&nbsp;Hiroshi Tachibana ,&nbsp;Haruo Inoue ,&nbsp;Tsutomu Shiragami","doi":"10.1016/j.jphotochem.2025.116402","DOIUrl":"10.1016/j.jphotochem.2025.116402","url":null,"abstract":"<div><div>A hybrid composed of polyfluoroalkyl azobenzene derivative (C3F-Azo-C6H) and layered niobate nanosheet can undergo interlayer distance change and nanosheet sliding motion upon photo-irradiations. However, such morphology changes are not yet sufficiently controlled, exhibiting somewhat fluctuating results. It is necessary to clarify what kind of intercalation environment promotes the high-order architecture formation suitable for the more efficient photo-induced morphology change. In this study, we have focused on the pH conditions of intercalation solution and analyzed the nanostructure and morphology change of the hybrid fabricated under the basic (pH = 11.0) and the acidic (pH = 2.4) conditions. Intercalating C3F-Azo-C6Hs into the nanosheets under the basic condition afforded a larger interlayer distance as compared with that under the acidic condition. Furthermore, the more substantial interlayer distance change (expansion ratio: 21 %) and the nanosheet sliding (sliding distance: ∼ 200 nm) were successfully induced upon UV–vis photo-irradiations of the hybrid fabricated under the basic conditions, while the hybrid fabricated under the acidic conditions exhibited the smaller changes (interlayer expansion ratio: 0.8 % with unstable/negligible nanosheet sliding). Under the basic conditions, the nanostructure of the C3F-Azo-C6Hs bilayer having non-interdigitation of the terminal alkyl chain of the two-monolayers faced each other in the bilayer caused the substantial morphology changes such as interlayer distance change and nanosheet sliding, whereas the deeply interdigitated terminal alkyl chains in the hybrid fabricated under the acidic conditions caused only a little/negligible morphology change. Factors controlling the drastic changes of the nanostructure derived from the different fabrication conditions have been discussed.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116402"},"PeriodicalIF":4.1,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685782","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}

{"title":"A water-soluble copper(II) complex fluorescent probe for high-sensitive and selective detection of endogenous H2S","authors":"Qing Miao,&nbsp;Jing-Yi Yin,&nbsp;Yu-Xuan Wang,&nbsp;Chen Zhang,&nbsp;Si-Yue Ma,&nbsp;Lin-Lin Wang,&nbsp;Chao Wang,&nbsp;Guang Chen","doi":"10.1016/j.jphotochem.2025.116403","DOIUrl":"10.1016/j.jphotochem.2025.116403","url":null,"abstract":"<div><div>H₂S has been identified as a third gasotransmitter involved in bio-modulation pathways. However, the low concentration of endogenous H₂S makes it difficult to trace and detect. In this study, a net charged and water-soluble copper(II) complex, <strong>Cu-L</strong>, is reported as an endogenous H₂S detector by utilizing a fluorescence on–off–on strategy. The luminescence of ligand <strong>L</strong> (a DNS-modified DO2A derivant), which is quenched due to Cu²⁺ coordination, can be effectively and selectively relumed within seconds in the presence of H₂S. Meanwhile, <strong>Cu-L</strong> has been successfully employed for exogenous and endogenous H₂S imaging and neither <strong>Cu-L</strong> nor <strong>L</strong> shows toxicity at concentrations up to 50 μM. Moreover, <strong>Cu-L</strong> can trace endogenous H₂S concentration fluctuation by treating cells with different concentrations of S-propargyl-cysteine (SPRC), an endogenous H₂S modulator. Therefore, <strong>Cu-L</strong> holds the potential for H₂S detection both in vitro and in cell.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116403"},"PeriodicalIF":4.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685784","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}

{"title":"A sensitive and selective fluorescence-based bioanalytical method for quantifying 7-aminonitrazepam in urine samples using fluorescamine derivatization and response surface methodology","authors":"Maram H Abduljabbar ,&nbsp;Musaad M Althobaiti ,&nbsp;Farooq M. Almutairi ,&nbsp;Muneef M. Aldhafeeri ,&nbsp;Mohammed F. Aldawsari ,&nbsp;Yusuf S. Althobaiti ,&nbsp;Ahmed Serag ,&nbsp;Atiah H. Almalki","doi":"10.1016/j.jphotochem.2025.116400","DOIUrl":"10.1016/j.jphotochem.2025.116400","url":null,"abstract":"<div><div>Addiction is a growing public health concern, and the reliable detection of drug metabolites in biological samples is crucial for diagnosis, treatment, and forensic applications. This study presents a comprehensive method for the determination of 7-aminonitrazepam, a benzodiazepine metabolite, in urine samples using fluorescamine as a derivatizing agent for sensitive detection by fluorescence spectroscopy. The mechanism involves the reaction of fluorescamine with the primary amine group of 7-aminonitrazepam via nucleophilic addition, yielding a fluorescent product that can be quantified at λ_em 486 nm following excitation at λ_ex 385 nm. The derivatization reaction was optimized by evaluating different parameters, such as pH, reagent concentration, and reaction time, using a central composite design. This revealed a quadratic relationship between the fluorescence intensity and the reaction conditions, particularly the pH and reagent concentration. The method was then validated according to ICH M10 guidelines, demonstrating excellent linearity in the range of 25–1000 ng/mL, precision below 6 %, accuracy between 97.51 and 102.66 %, and high selectivity. The developed method was successfully applied to the analysis of rat urine samples, providing reliable quantification of 7-aminonitrazepam levels posing a promising alternative to conventional techniques.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116400"},"PeriodicalIF":4.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685783","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}

{"title":"Synthesis of novel bioactive amides derived from carbazole moiety with deep-blue and single-component white photoluminescence","authors":"Mostafa Ahmed ,&nbsp;Mostafa Sayed ,&nbsp;A.F. Al-Hossainy ,&nbsp;Mahmoud S. Tolba ,&nbsp;Osamu Tsutsumi ,&nbsp;Osama Younis","doi":"10.1016/j.jphotochem.2025.116394","DOIUrl":"10.1016/j.jphotochem.2025.116394","url":null,"abstract":"<div><div>This work focuses on the chemical synthesis of three fluorescent bioactive amides tethered carbazole moiety by coupling 3-amino-9-ethylcarbazole with different aliphatic carboxylic acids including valeric, hexanoic, and heptanoic acids. NMR spectroscopy and HRMS were utilized to confirm the claimed structure of the target compounds indicating good agreement. The antimicrobial activity of fluorescent amides was assessed against different strains of gram negative and gram-negative bacterial as well as fungi demonstrating outstanding activity close or same as the control. Moreover, the molecular design, DFT calculations, and photoluminescence characteristics of these dyes have been investigated. The examined materials solutions emitted a deep-blue emission. Interestingly, with the powders, on the other hand, a single component emitted white light. The creation of aggregated molecules in the solid state improved the emission intensity at long visible wavelengths, resulting in a change in the emission color from the solution to the powder. The studied materials also emitted consistently at high temperatures. Furthermore, the odd–even effect both on the molecular packing and emission characteristics has been proven. As a result, the molecules under investigation provide a unique combination of benefits: a simple molecular structure, deep-blue emitters, white emission from a single material, and an odd–even effect.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116394"},"PeriodicalIF":4.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685778","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}

{"title":"Theoretical regulation of firefly bioluminescence spectra: Exploring new frontiers in NIR-II imaging","authors":"Jinyu Wang ,&nbsp;Deping Hu ,&nbsp;Ya-Jun Liu","doi":"10.1016/j.jphotochem.2025.116393","DOIUrl":"10.1016/j.jphotochem.2025.116393","url":null,"abstract":"<div><div>Firefly bioluminescence (BL) imaging holds significant promise for non-invasive, real-time monitoring of biological processes. To improve its efficiency, considerable efforts have been made to achieve red-shifting of the emission wavelength. In this work, we systematically investigated the fluorescence properties of the light emitter oxyluciferin (<strong>oLu</strong>) dependent on the electrostatic effects using the TD DFT method. <strong>oLu</strong> is a typical donor–acceptor (D-A) charge transfer system, with the benzothiazole group acting as the electron donor and the thiazole group as the electron acceptor. Therefore, we focused on the significant impact of external charges on the fluorescence wavelength (<em>λ</em>_F), where the negative charge around the benzothiazole (donor) and/or the positive charge around the thiazole (acceptor) side promotes a red-shift in <em>λ</em>_F. Basing on these insights, we theoretically explored modifications to the <strong>oLu</strong> structure and mutations in luciferase to enhance D and A properties of <strong>oLu</strong> for facilitating the <em>λ</em>_F red-shift. Besides, we also inserted conjugation structures between D and A of <strong>oLu</strong> to format D-π-A systems for further red-shifting the <em>λ</em>_F. By integrating <strong>oLu</strong> modifications with luciferase mutations, we successfully designed a new <strong>nova-I351D</strong> using MD and QM/MM methods, a bioluminescent system that emits brightly in the near-infrared II (NIR-II) region. This system demonstrates significant potential for deep tissue imaging, providing a promising advancement in bioluminescence-based imaging technologies.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116393"},"PeriodicalIF":4.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685786","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}

{"title":"MnCoO nanosheets with enhanced oxidase mimetic activity: A novel platform for sensitive rutin detection","authors":"Amal A. El-Masry ,&nbsp;Heba Elmansi ,&nbsp;Nahed El-Enany","doi":"10.1016/j.jphotochem.2025.116395","DOIUrl":"10.1016/j.jphotochem.2025.116395","url":null,"abstract":"<div><div>This study introduces a new spectrophotometric approach for rutin quantitation using a smart platform based on the metal organic framework. Bimetallic porous Mn/Co oxide nanosheets (MnCoO-NSs) were synthesized through a simple, one-step hydrothermal process under mild conditions. A versatile “one-stone-two-birds” strategy was employed to create nanosheets rich in oxygen vacancies. These vacancies facilitate the activation of O2, generating the primary reactive intermediate, O2^•− radicals. This is followed by enhanced oxidase mimetic activity commencing 3,3′,5,5′-tetramethyl-benzidine (TMB) oxidation. Rutin could induce the reduction of oxTMB and result in a noticeable blue color fading. The prepared. NSs show high sensitivity towards rutin detection with a low detection limit of 0.25 µg mL⁻¹, along with satisfactory selectivity and reliability. The linearity range was 1.0–60.0 µg mL⁻¹. This research not only introduces an efficient, non-precious metal oxidase mimic but also develops a sensitive and environmentally friendly colorimetric approach for rutin determination. The green attributes of this method are substantiated through a comprehensive evaluation, highlighting its potential for sustainable analytical applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116395"},"PeriodicalIF":4.1,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685787","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}

{"title":"GO and CNT template impact on the WO3/Bi2S3 photocatalytic activity for pharmaceutical active compounds removal","authors":"Alexandru Enesca","doi":"10.1016/j.jphotochem.2025.116387","DOIUrl":"10.1016/j.jphotochem.2025.116387","url":null,"abstract":"<div><div>A combined sol–gel and doctor blade techniques were used to obtain two types of composites. Graphene oxide (GO) and carbon nanotubes (CNTs) were used as template in the sol–gel procedure which include two steps: WO₃ and Bi₂S₃ development. The composites crystallinity and morphology were investigated indicating the formation of monoclinic WO₃ and orthorhombic Bi₂S₃. The GO template samples exhibit porous sponge-like morphology with 285 m²/g S_BET, while the CNTs template samples have a granular morphology with 294 m²/g S_BET. The elemental analysis indicate that the composite components are evenly distributed through the sample. Both GO and CNTs based samples have a predominant polar component of the surface energy which make them suitable candidate for applications in aqueous environments. The photocatalytic removal efficiency was tested in the presence penicillin G and amoxicillin (150 ppm) under UV and Vis irradiation. The highest efficiencies correspond to GO/WO₃/Bi₂S₃ which was able to remove 57.43 % PEN-G and 63.94 % AMO. The photocatalytic mechanism was investigated and described in details.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116387"},"PeriodicalIF":4.1,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sought gold, found a diamond: Outstanding photocatalytic performance of porpholactones","authors":"Alina D. Oparina ,&nbsp;Ekaterina S. Shremzer ,&nbsp;Daria A. Polivanovskaia ,&nbsp;Kirill P. Birin ,&nbsp;Aslan Yu. Tsivadze","doi":"10.1016/j.jphotochem.2025.116389","DOIUrl":"10.1016/j.jphotochem.2025.116389","url":null,"abstract":"<div><div>Expansion of the aromatic system is one of the key tools for controlling of the photocatalytic activity of porphyrin sensitizers. In the present work a conventional approach towards panchromatic pyrazine-fused porphyrin dimers by aerobic oxidation 2,3-diaminoporphyrins was revealed. The photoactivity of a set of such π-expanded porphyrins in oxidation of organic sulfides was investigated. The formation of a porpholactone by-product in the synthesis of diporphyrins with hindered <em>meso</em>-substituents was observed, which unexpectedly showed outstanding photocatalytic activity. Moreover, the preparation of the In(III) porpholactone complex allowed further efficiency improvement due to heavy metal effect and made it possible to exceptional turnover numbers (TON) of the photocatalyst above 830 000. The fact made the In(III) porpholactone the most effective photocatalyst for the sulfoxidation among described analogues.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116389"},"PeriodicalIF":4.1,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686280","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}

{"title":"Effect of N-quaternization on crystal and electronic structures of E-pyridylvinyl benzothiazoles – Photophysical and electrochemical properties, and cytotoxicity studies","authors":"Shyamvarnan Baskar ,&nbsp;Rashmi Yadav ,&nbsp;Geetha Shanmugam ,&nbsp;Koustav Sarkar ,&nbsp;Animesh Samanta ,&nbsp;Goutam Kumar Kole","doi":"10.1016/j.jphotochem.2025.116392","DOIUrl":"10.1016/j.jphotochem.2025.116392","url":null,"abstract":"<div><div>The syntheses and structural characterization by single-crystal X-ray diffraction and various spectroscopic methods of benzothiazole-derived pyridyl-based fluorophores, namely, <em>E</em>-3-pyridylvinyl benzothiazole (<strong>3-PVBT</strong>), <em>E</em>-3-<em>N</em>-methylpyridinium vinyl benzothiazole (<strong>3-MPVBT</strong>), <em>E</em>-4-pyridylvinyl benzothiazole (<strong>4-PVBT</strong>), and <em>E</em>-4-<em>N</em>-methylpyridinium vinyl benzothiazole (<strong>4-MPVBT</strong>) have been presented to derive a comprehensive structure–property correlation. Notably, <strong>3-MPVBT</strong> with <em>Z’</em> = 2 belongs to a rare class of crystals. Upon <em>N</em>-quaternization, the cationic compounds exhibited red-shifted absorption and emission. Significantly larger Stokes shifts of 8700 and 8000 cm⁻¹, respectively, for <strong>3-MPVBT</strong> and <strong>4-MPVBT</strong> were observed due to intramolecular charge transfer (ICT), compared to Stokes shifts of 6100 and 7700 cm⁻¹ for their neutral analogues. The experimental results have been rationalized by DFT and TD-DFT calculations. Enhanced electrochemical reversibility was also observed in both the <em>N</em>-methylated compounds. Furthermore, the cytotoxicity of two selected fluorophores, <strong>3-MPVBT</strong> and <strong>4-MPVBT</strong>, was evaluated against breast cancer cell lines. Remarkably, <em>N-</em>quaternization is associated with multiple advantages, including red-shifted absorption and emission, larger Stokes shifts, stabilized HOMOs and LUMOs, diminished band gap, solubility in physiological pH, and advantageous redox characteristics.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116392"},"PeriodicalIF":4.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643398","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}

{"title":"Stacking machine learning models for predicting photophysical properties of iridium complexes","authors":"Ding Peng ,&nbsp;Lin Liu ,&nbsp;Bin-Bin Xie ,&nbsp;Lin Shen ,&nbsp;Xuebo Chen ,&nbsp;Wei-Hai Fang","doi":"10.1016/j.jphotochem.2025.116374","DOIUrl":"10.1016/j.jphotochem.2025.116374","url":null,"abstract":"<div><div>Iridium complexes have played a key role in organic emitting diodes (OLEDs) devices as emitter for its high efficiency, appropriate solubility, and availability for emission color tuning. Although several progress has been made by using machine learning (ML) in designing new materials for OLEDs, there is still much room for enhancing the capability, transferability, and usability of machine learning. In the present work, we construct stacking ML models for predicting emission properties of iridium complexes, and multi-task for absorption wavelength prediction. Compared with the existing ML models, we propose an exhaustive feature generation process for iridium complexes, in which the original features of ligands of each complex are combined together according to the order of electronic structure properties. Then we build a series of meta learners in order to improve the accuracy in the emission task and to transfer ML models for predicting other photophysical properties such as the absorption wavelength. The influence of different feature selection methods and different machine learning algorithms on the performance of ML prediction is discussed in detail. We suggest concatenating the Morgan fingerprints of ligands according to a sorted order of electronic structure properties of isolated ligands as a simple and robust way to generate the input feature of complexes. The electronic structure calculations on isolated ligands can be replaced by ML, which further improves computational efficiency of the whole procedure. Promotion from base to meta learners and the advantage of gradient boosting algorithms can be observed in most tasks.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"466 ","pages":"Article 116374"},"PeriodicalIF":4.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685780","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}