Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Triphenylamine functionalized fluorenone derivative exhibiting aggregation-induced emission and multi-stimuli responsive property","authors":"Xianchao Du ,&nbsp;Xiang Liu ,&nbsp;Qianyun Liu ,&nbsp;Ziwei Zhao ,&nbsp;Datai Liu ,&nbsp;Shuyin Lv ,&nbsp;He Lei ,&nbsp;Dongqin Bi ,&nbsp;Xinfeng Cheng ,&nbsp;Dongfang Qiu ,&nbsp;Maosen Yuan","doi":"10.1016/j.jphotochem.2025.116827","DOIUrl":"10.1016/j.jphotochem.2025.116827","url":null,"abstract":"<div><div>Most reported stimuli-responsive luminogens with AIE properties are single-functional. Thus, developing molecules with integrated multi-responsive capabilities presents significant research potential. In this study, a triphenylamine functionalized fluorenone derivative (<strong>TPAF</strong>) with AIE property was designed and synthesized. The material exhibited multiple properties, which included mechanochromism, thermochromism, vapochromism, anti-counterfeiting, WLED, and water sensing. <strong>TPAF</strong> exhibited weak emission in its crystalline state (<strong>C-TPAF</strong>), but displayed high-contrast “turn-on” emission upon grinding, contrary to the behavior of most mechanochromic AIEgens. Furthermore, when <strong>C-TPAF</strong> was heated, a bright amorphous luminescent form of <strong>TPAF</strong> was obtained. The fluorescence and crystalline structure of <strong>C-TPAF</strong> could be fully restored through dichloromethane fumigation. This unique stimuli-responsive behavior could be repeated multiple times with minimal change. The real-time in situ fluorescence, micrographs, powder X-ray diffraction, scanning electron microscopy, and single-crystal X-ray analysis demonstrated that the multi-stimuli response of <strong>C-TPAF</strong> could be attributed to changes in molecular packing, with <strong>TPAF</strong> transitioning between crystalline and amorphous forms under external stimuli. Owing to the unique response to various stimuli of <strong>C-TPAF</strong>, a high-performance and optical data encryption was achieved using <strong>C-TPAF</strong>, which verified through changes in luminescence induced by external heat or vapor. Moreover, <strong>TPAF</strong> exhibited strong red emission in the aggregated state. A white LED device was fabricated via doping, and it demonstrated good stability. In addition, a <strong>TPAF</strong> fluorescence-based water detector demonstrated effective detection of water in organic solvents. This study provides a theoretical basis for exploring the relationship between molecular structure and performance and offers important insights for the development of high-performance, multi-stimuli responsive materials.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116827"},"PeriodicalIF":4.7,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267821","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":"AIE-active bolaamphiphile assemblies: multifunctional biosensors for mitochondria-targeted cell imaging and fluorescence turn-on BSA sensing in living organisms","authors":"Shoujun Lai ,&nbsp;Yang Han ,&nbsp;Xiaoyu Chang ,&nbsp;Xueqin Yang ,&nbsp;Peizong Li ,&nbsp;Yulin Si ,&nbsp;Zixuan Liu ,&nbsp;Linlin Guo ,&nbsp;Xiaolin Guan","doi":"10.1016/j.jphotochem.2025.116821","DOIUrl":"10.1016/j.jphotochem.2025.116821","url":null,"abstract":"<div><div>There is a persistent need for monitoring bovine serum albumin (BSA) at ultra-low levels, as it plays a significant role in identifying various health conditions and potential risks. Herein, we have developed three multifunctional nanoprobes based on bolaamphiphile assemblies for fluorescence “turn-on” BSA detection in living organisms and mitochondria-targeted cell imaging. The fluorescence intensities of as-prepared AIE-active bolaamphiphiles (TPE-C8-Br, TPE-C8-Ts and TPE-C8-HS) can be effectively enhanced by BSA based on the formation of bolaamphiphiles/BSA aggregates through electrostatic force of attraction between positive charges on the bolaamphiphile and negative charges on BSA. Moreover, the responses were linearly proportional to BSA concentration ranging from 0 to 2000 μg/mL, with low detection limits of 1.4, 0.7 and 1.2 μg/mL, respectively. Besides, three bolaamphiphiles can also be exploited as nanoscale optical biosensors for in vivo imaging based on their good water solubilities, low cytotoxicities and strong biorecognition ability. Bio-imaging studies demonstrated that bolaamphiphile assemblies could be targeted to mitochondrial organelles as specific and efficient mitochondrial tracers. Notably, they enabled BSA detection in live cells and even whole organisms like zebrafish. Thus, our study provides a promising approach for creating a novel class of multifunctional nanobiosensor for imaging of organelles and fluorescence turn-on biomacromolecules sensing in living organisms.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116821"},"PeriodicalIF":4.7,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267319","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":"Reinforcement in synergism of photocatalysis/persulfate activation for the removal of ciprofloxacin via coupling photoinduced electrons and FeOOH quantum dots","authors":"Ping Huang,&nbsp;Jianan Peng,&nbsp;Fangyan Chen,&nbsp;Linzhi Zhai,&nbsp;Wenqian Sun,&nbsp;Yanhua Song,&nbsp;Yubin Tang","doi":"10.1016/j.jphotochem.2025.116816","DOIUrl":"10.1016/j.jphotochem.2025.116816","url":null,"abstract":"<div><div>Recently, the simultaneous photocatalysis/persulfate activation (SPPA) system is considered as a desirable strategy for the efficient decomposition of organic pollutants. In a SPPA system, an appropriate photocatalysts will play a vital role for achieving a high degradation efficiency. Herein, FeOOH quantum dots (QDs) were embedded on flower-like SnS₂ to develop a novel composite material FeOOH/SnS₂ (Fe-SS), and a SPPA system (named as Vis/Fe-SS/PS system) was constructed for the removal of ciprofloxacin (CIP). Compared with SnS₂ and FeOOH, the fabricated Fe-SS composites exhibit outstanding Visible light absorption, accelerated photocarriers transfer, and significantly boosted ability for sulfate activation, thus presenting high performance for the degradation of CIP. The optimum Vis/15Fe-SS/PS achieves 84 % of CIP degradation efficiency and 32 % of mineralization rates. The high performance of Vis/15Fe-SS/PS resulting from the synergism of photoinduced electrons and FeOOH QDs in persulfate activation. Combining the band position and the results from capture experiments and electron spin resonance (ESR) tests, the possible mechanism of Vis/15Fe-SS/PS system was proposed. The photoinduced electrons not only was captured by O₂ to generate ·O₂⁻ but also was accepted by FeOOH to activate PS to SO₄^·- for the removal of CIP via the successive redox circulation of Fe(III)/Fe(II). In addition, Vis/15Fe-SS/PS possesses good stability and higher removal rate toward other organic contaminants, showing the wide application in the organic wastewater treatment. This work is expected to offer ideas for the design of novel catalytic materials for the activation of PS.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116816"},"PeriodicalIF":4.7,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267320","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":"Na+-driven enhancement of the 5D₀ → 7F₄ emission in Eu3+-activated KCa₄(BO₃)₃: photoluminescence and Judd–Ofelt study","authors":"E. Ekdal Karali ,&nbsp;Abeer S. Altowyan ,&nbsp;S. Yusan ,&nbsp;H. Aydin ,&nbsp;U.H. Kaynar ,&nbsp;M.B. Coban ,&nbsp;Jabir Hakami ,&nbsp;E. Aymila Çin ,&nbsp;T. Karman ,&nbsp;A. Canimoglu ,&nbsp;N. Can","doi":"10.1016/j.jphotochem.2025.116829","DOIUrl":"10.1016/j.jphotochem.2025.116829","url":null,"abstract":"<div><div>A series of Eu³⁺-activated KCa₄(BO₃)₃ (KCOB) phosphors were synthesized using a conventional solid-state reaction method. The structural, morphological, and photoluminescence properties were systematically tuned via Li⁺ and Na⁺ co-doping. Rietveld-refined X-ray diffraction confirmed successful substitution of Ca²⁺ sites by Eu³⁺ and alkali ions without forming secondary phases. FTIR and Raman spectroscopy validated the stability of the [BO₃]³⁻ unitswhile also indicating local vibrational distortions caused by asymmetry in the crystal field environment. SEM images displayed uniform microstructures with enhanced surface densification upon alkali incorporation. Photoluminescence spectra exhibited strong red emission centered at ∼613 nm, attributed to the ⁵D₀ → ⁷F₂ electric dipole transition of Eu³⁺, with intensity enhancement under alkali co-doping due to increased site asymmetry. Judd–Ofelt analysis revealed significant increases in Ω₂ and Ω₄ parameters, particularly in Na⁺-doped samples, confirming the enhancement of electric dipole transition probabilities. CIE chromaticity analysis showed that Li⁺ co-doping at y = 0.02 yielded the highest color purity (84 %) and lowest correlated color temperature (CCT ≈ 1940 K), while Na⁺ co-doping provided moderate-to-high color purity (up to 79 %) with tunable CCT values between 1831and 2038 K. Temperature-dependent PL studies anomalous non-monotonic behavior, including partial intensity recovery at elevated temperatures, deviating from classical quenching models. This suggests the involvement of defect-mediated recombination pathways and strong local crystal field effects stabilizing emission under thermal stress. These findings demonstrate that Li⁺/Na⁺ co-doping enables precise tuning of crystal symmetry, emission intensity, chromaticity, and thermal resilience. Thus, KCOB:Eu³⁺ phosphors with optimized alkali content represent promising candidates for thermally robust, high-purity red emitters in near-UV-pumped warm-white solid-state lighting systems.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116829"},"PeriodicalIF":4.7,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267820","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":"Facile synthesis of dual rare earth metal-doped carbon quantum dots as photoluminescent sensors for Ag+ and Hg2+ detection with intracellular bioimaging applications","authors":"Sonaimuthu Mohandoss ,&nbsp;Prasanta Roy ,&nbsp;Naushad Ahmad ,&nbsp;Kuppu Sakthi Velu ,&nbsp;Subramanian Palanisamy ,&nbsp;Mohammad Aslam ,&nbsp;SangGuan You ,&nbsp;Seong-Cheol Kim","doi":"10.1016/j.jphotochem.2025.116823","DOIUrl":"10.1016/j.jphotochem.2025.116823","url":null,"abstract":"<div><div>Carbon quantum dots (CQDs) have attracted a lot of attention in biomedical applications because of their high-water solubility, low cost, and excellent biocompatibility. In this work, europium and terbium-decorated carbon quantum dots (Eu/Tb-CQDs) as photoluminescent sensors for Ag⁺ and Hg²⁺ detection with intracellular bioimaging applications. Eu/Tb-CQDs were synthesized using α-dextrose and melamine as a carbon and nitrogen source and EuCl₃/TbCl₃ as a dual metal doping. In this aspect, the strong coordination between the Eu³⁺/Tb³⁺ ions and the hydroxyl and carboxylate oxygen at the CQDs surface allows them to be combined into the carbon core. The as-synthesized Eu/Tb-CQDs were thoroughly characterized by using various analytical such as UV–visible/photoluminescence (PL) spectroscopy, FTIR, XRD, TEM, and XPS analysis. The as-synthesized Eu/Tb-CQDs exhibited a characteristic excitation-dependent PL emission peak at 519 nm upon excitation at a wavelength of 338 nm. The size of the as-prepared Eu/Tb-CQDs is 4.13 ± 0.18 nm with a high quantum yield of 26.2 ± 0.4 %. The obtained Eu-GQDs were used as a new “on-off” Photoluminescent probe for the label-free determination of Ag⁺ and Hg²⁺ ions with high sensitivity and selectivity. In addition, a good linear relationship between PL intensity (P₀/P) vs. Ag⁺ and Hg²⁺ ions concentration in the range of 0 to 10 μM (R² = 0.9949 and 0.9905) with limit of detection (LOD) of 50.1 nM (Ag⁺) and 33.3 nM (Hg²⁺). The sequential addition of EDTA with Ag⁺ and Hg²⁺ ions can recover the PL intensity in a reversible manner. The assay notably showed strong reliability for real water samples in tap water and lake water indicating its potential uses for monitoring Ag⁺ and Hg²⁺ in complex environments. Besides, the Eu/Tb-CQDs holds good aqueous dispersibility and low cytotoxicity, which shows great potential applications in bioimaging.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116823"},"PeriodicalIF":4.7,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267346","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 study on interfacial regulation and function mechanism of S-scheme 001-TiO2/CeO2 two-dimensional charge-separation Interface for photocatalytic degradation of unsymmetrical Dimethylhydrazine","authors":"Yizhi Zeng,&nbsp;Xianghong Ren","doi":"10.1016/j.jphotochem.2025.116818","DOIUrl":"10.1016/j.jphotochem.2025.116818","url":null,"abstract":"<div><div>Unsymmetrical dimethylhydrazine (UDMH), as a high-energy liquid rocket fuel widely used for energy liquid rocket fuel, inevitably produces huge volumes of UDMH wastewater during use. As UDMH and its byproducts are both highly toxic, this poses a severe threat to ecological environment and human health, making it an urgent need to develop an efficient, environmentally friendly treatment for UDMH wastewater. Photocatalytic technology has emerged as a research hotspot in the field of water pollution control owing to its low cost and eco-friendliness. In this study, a (001) facet-dominated 001-TiO₂/CeO₂ S-scheme heterojunction was constructed via a solvothermal-photoassisted method, effectively achieving primary carrier separation. Under simulated solar irradiation, this structure achieved a 98.7 % degradation efficiency for 100 mg/L UDMH wastewater within 140 min, with degradation rate constants 3.8 times and 5.5 times higher than those of 001-TiO₂ and P25, respectively. To address the challenge of recovering powdered photocatalysts, this study immobilized the nanopowders using a silver conductive adhesive, creating a two-dimensional conductor interface for electron transport and a nanoparticle structure for hole retention, thereby enabling secondary carrier separation. Under simulated solar irradiation, this immobilized structure achieved a 75.1 % degradation efficiency for 100 mg/L UDMH wastewater within 420 min. More importantly, it demonstrated excellent reusability and recyclability. This study provides a practical and feasible approach for the efficient degradation of UDMH wastewater.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116818"},"PeriodicalIF":4.7,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267822","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":"Excited state intramolecular proton transfer reaction in 4′,5-dimethoxy-3-hydroxyflavone: partial shielding of intermolecular H-bonding with protic molecules by 5-OCH3 group and its impact on ESIPT rate and fluorescence spectra","authors":"Andrey O. Doroshenko,&nbsp;Andrii Yu. Chumak,&nbsp;Oleksii O. Kolomoitsev,&nbsp;Volodymyr M. Kotlyar","doi":"10.1016/j.jphotochem.2025.116817","DOIUrl":"10.1016/j.jphotochem.2025.116817","url":null,"abstract":"<div><div>Continuing our investigations of intra- and intermolecular factors regulating the fastest known photochemical reaction, the excited state intramolecular proton transfer (ESIPT), on the example of 3-hydroxyflavone (3HF) series, methoxy group was introduced in position 5 of 3HF core with the aim to check its potential shielding effect for carbonyl group in position 4 from intermolecular H-bonding with protic molecules. Such an intermolecular hydrogen bond was considered as the main retarding factor for the ESIPT reaction of 3-hydroxyflavones. The effect of such substitution was studied both theoretically and experimentally for 4′,5-dimethoxy-3-hydroxyflavone (<strong>45DM3HF</strong>): fluorescence spectra and lifetimes allow us to estimate ESIPT rates in a series of protic solvents and compare them with the data of model compound without substituents in position 5. Partial inhibition of intermolecular H-bonding was revealed both theoretically and experimentally, owing to which ESIPT reaction in the title compound demonstrates less pronounced sensitivity to proton donors and/or humidity in aprotic surroundings. The additional effect of 5-methoxy group is the absence of typical to most 3HFs ground state anionic species formation, which were not registered both in the absorption and fluorescence spectra of <strong>45DM3HF</strong>.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116817"},"PeriodicalIF":4.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267352","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":"Facile synthesis of bipyridine-derived hole transport materials for highly efficient inverted hybrid solar cells","authors":"Juan Pei ,&nbsp;Haijun Lv ,&nbsp;Shaoyan Zhang ,&nbsp;Yingpin Li","doi":"10.1016/j.jphotochem.2025.116815","DOIUrl":"10.1016/j.jphotochem.2025.116815","url":null,"abstract":"<div><div>Organic small-molecule hole transport materials are exceptional building blocks for optoelectronics devices owing to their unique properties including versatile chemical structures, adjustable energy levels, as well as simple synthesis and easy purification. In this study, four bipyridine-based organic hole transport materials (P1, P3, P7 and P9) were designed, synthesized, and characterised. The hole transport materials were specifically tailored with a bipyridine moiety as the electron acceptor, a conjugated π bridge of varying lengths, and a substituted triphenylamine group as the electron donor. These molecules exhibit intramolecular charge transfer, confirming their linear donor-acceptor-donor (D-A<img>D) configuration. They have a wide and strong optical response in the UV–visible region, and their energy levels can be modulated to facilitate the charge-transfer process efficiently in hybrid systems. Specifically, the P7 molecule with a large conjugation system exhibited excellent hole transport performance because of enhanced intermolecular π-π packing and π-π interaction. Consequently, the photoelectric conversion efficiency (PCE) of the P7-based inverted hybrid solar cell is up to 5.86 %, outperforming that of the commonly used conjugated polymer hole transport material poly(3-hexylthiophene) (P3HT, PCE: 4.38 %) under the same test conditions. This study provides a comprehensive understanding of the mechanisms by which organic hole transport materials can improve the efficiency and sustainability of photovoltaic devices.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116815"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267348","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":"Investigation of plasmonic enhanced fluorescence effect induced from chips possessing numerous hotspots prepared by a facile process: Applied for the recognition of antigen-antibody reaction","authors":"Gude Zhang ,&nbsp;Hongzhong Hu ,&nbsp;Xianling Piao ,&nbsp;Yuhong Sun ,&nbsp;Xian Wu Cheng ,&nbsp;Xun Lu ,&nbsp;Chunzhi Cui","doi":"10.1016/j.jphotochem.2025.116813","DOIUrl":"10.1016/j.jphotochem.2025.116813","url":null,"abstract":"<div><div>Development of highly sensitive chips through a straightforward preparation process is a goal pursued by researchers and engineers. A common strategy involves the efficient utilization of plasmonic fields generated by noble metal nanostructures. In this study, we present a simple preparation process that yields sensor chips with numerous hotspot structures, achieved solely through ozone plasma treatment and silver (Ag) physical vapor deposition (PVD) on a photosensitive resin. Using these plasmonic-enhanced fluorescence (PEF) chips by attaching a polydiacetylene (PDA) probe material, an antigen-antibody interaction is successfully detected. Optimized Ag nanocluster arrays are demonstrated a 34-fold fluorescent enhancement comparing to the planar Ag nanostructure upon the concentration of the antigen myeloid progenitor cell inhibitory factor 1 (MPIF-1) is 1.25 ng/mL. According to analyses, it is found that the 34-fold fluorescent enhancement is attributed to the periodic structure and the hotspot effect. Based on this, the limit of detection (LOD) for the MPIF-1 is achieved the concentration of approximately 30 pg/mL.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116813"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267349","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":"Visible-light-induced metal- and photocatalyst-free oxidative intramolecular cyclization of N-methyl-N-substituted-[1,1′-biaryl]-2-amines: facile access to phenanthridinones","authors":"Palani Natarajan,&nbsp;Partigya,&nbsp;Pooja,&nbsp;Priya,&nbsp;Meena","doi":"10.1016/j.jphotochem.2025.116812","DOIUrl":"10.1016/j.jphotochem.2025.116812","url":null,"abstract":"<div><div>A visible-light-induced strategy for the synthesis of a series of phenanthridinones from readily accessible N-methyl-N-substituted-[1,1′-biaryl]-2-amines, molecular oxygen (balloon), N-iodosuccinimide (NIS) and DCE has been established. This method does not require a photosensitizer or any metal reagent because N-methyl-N-substituted-[1,1′-biaryl]-2-amines and NIS form an electron donor-acceptor complex that allows the production of desired phenanthridinones in good yields under visible-light irradiation. Moreover, in contrast to literature reported methods of synthesis of phenanthridinones from N-substituted-[1,1′-biaryl]-2-amines, this procedure is mild, easy to use, metal-free, toxic CO-free, and works at room temperature. Furthermore, under the action of visible-light, this is the first method to convert <em>N</em>-methyl-N-substituted-[1,1′-biaryl]-2-amines into phenanthridinones.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"472 ","pages":"Article 116812"},"PeriodicalIF":4.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267350","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}