Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Dual emissive nanoprobe for reliable detection of antipsychotic drug fluphenazine using silicon nanoparticles and eosin dye","authors":"Yousef A. Bin Jardan ,&nbsp;Mohamed M. El-Wekil ,&nbsp;Mohamed R. Elmasry ,&nbsp;Al-Montaser Bellah H. Ali","doi":"10.1016/j.jphotochem.2025.116464","DOIUrl":"10.1016/j.jphotochem.2025.116464","url":null,"abstract":"<div><div>Fluphenazine (FLU) is a widely used antipsychotic drug associated with significant extrapyramidal side effects, including dystonia, akathisia, and Parkinsonism. As such, the development of innovative and reliable sensors for its precise determination is of critical importance. In this study, a robust ratiometric fluorescent sensor was designed for accurate sensing of FLU. The probe utilizes a combination of fluorescent silicon nanoparticles (fSiNPs) and eosin, which exhibit dual emissions at 430 nm (blue) and 512 nm (green) upon excitation at 330 nm. The addition of FLU resulted in a significant quenching of eosin fluorescence at 512 nm, attributed to electrostatic interactions, hydrogen bonding, and π–π stacking interactions between the aromatic systems. Meanwhile, the fluorescence emission of the silicon nanoparticles (fSiNPs) at 430 nm remained unaffected, serving as a stable internal reference signal for ratiometric measurements. The fluorescence intensity ratio (F430/F512) exhibited a linear response to FLU concentrations in the range of 0–400 µM, with a calculated detection limit of 1.5 nM (S/N = 3). The fluorescent system was successfully applied for the detection of FLU in pharmaceutical tablets and human biological fluids, including serum and urine samples. The method achieved recovery rates ranging from 95.5 % to 103.7 %, with RSDs between 2.54 % and 4.03 %. The results highlight the high accuracy, precision, and reproducibility of the method for FLU quantification across diverse sample matrices. This robust performance underscores the system’s potential as a reliable analytical tool for pharmaceutical quality control and clinical diagnostics.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116464"},"PeriodicalIF":4.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143913169","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 microplastics on the photodegradation of high-consumption drugs under simulated sunlight: The critical role of aging and reactive oxygen species","authors":"Dimitrios Kalaronis ,&nbsp;Eleni Evgenidou ,&nbsp;George Z. Kyzas ,&nbsp;Aikaterini Teknetzi ,&nbsp;George Vourlias ,&nbsp;Dimitrios N. Bikiaris ,&nbsp;Dimitra A. Lambropoulou","doi":"10.1016/j.jphotochem.2025.116463","DOIUrl":"10.1016/j.jphotochem.2025.116463","url":null,"abstract":"<div><div>The main aim of this study was to examine the effect of polypropylene (PP), poly(ethylene terephthalate) (PET), and poly(lactic acid) (PLA) microplastics (MPs) on the photolytic degradation of a mixture of seven commonly used pharmaceuticals under simulated solar irradiation (SSL). The target mixture included four common antibiotics (metronidazole, trimethoprim, indomethacin, isoniazid), two non-steroidal anti-inflammatory drugs (diclofenac, ketoprofen), and one antihypertensive drug (valsartan). The selected MPs were aged using three different procedures: (i) SSL light, (ii) UV/H₂O₂, and (iii) Fenton reagent. The effect of MPs mass concentration was examined using only the pristine MPs, while the aging effect was evaluated for the three different aged MPs for each polymer type. The results demonstrated that the presence of MPs generally accelerates the photolytic degradation of the drugs, and increasing their concentration further enhances the reaction rate. Aging of the MPs also appeared to enhance the photodegradation of the selected pharmaceuticals. Among the various aging processes applied, UV/H₂O₂ had the greatest impact on surface alteration of the MPs and consequently, UV/H₂O₂-aged PET MPs exhibited the highest influence on the photolytic degradation of the drugs. To gain a deeper understanding of the mechanism behind the photolytic degradation of the examined pharmaceuticals, a systematic characterization of pristine and aged MPs was conducted using Fourier transformed infrared spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), and Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) techniques, which detected the formation of oxygen containing groups on the MPs’ surfaces. Finally, scavenger experiments were also conducted to explore the formation and role of reactive oxygen species (singlet oxygen, superoxide anions, and hydroxyl radicals) in the degradation of the target compounds.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116463"},"PeriodicalIF":4.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917388","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":"Luminescence properties of LaNb2VO9:Eu3+ phosphors with efficient UV excitation bands for w-LEDs, plant cultivation LEDs, and latent fingerprint detection","authors":"Yufeng Du ,&nbsp;Houteng Zhao ,&nbsp;Tianen Guo ,&nbsp;Zhehui Xu ,&nbsp;Renyan Qing ,&nbsp;Samra Jabeen ,&nbsp;Junzhi Che ,&nbsp;Shanshan Tong ,&nbsp;Xianchao Du ,&nbsp;Ruijin Yu","doi":"10.1016/j.jphotochem.2025.116476","DOIUrl":"10.1016/j.jphotochem.2025.116476","url":null,"abstract":"<div><div>A novel red-emitting phosphor, LaNb₂VO₉:Eu³⁺, was successfully synthesized using the traditional solid-state reaction method. A comprehensive characterization was carried out, covering crystal structure analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) properties, decay time measurement, and luminous thermal stability assessment. Upon excitation at 301 nm, the LaNb₂VO₉:Eu³⁺ phosphor exhibited four distinct emission peaks, corresponding to transitions from the ⁵D₀ state to the ⁷H<em>n</em> levels (where <em>n</em> = 1, 2, 3, and 4) of Eu³⁺. The most pronounced emission peak occurred at 618 nm, attributed to the ⁵D₀ to ⁷F₂ transition. The Judd-Ofelt parameters (<em>Ω</em>₂, <em>Ω</em>₄) for the Eu³⁺-doped LaNb₂VO₉ phosphors were determined from the emission spectra. It was determined that 30 mol% of Eu³⁺ was the most optimal doping concentration for La_1-<em>_x</em>Nb₂VO₉:<em>x</em>Eu³⁺ phosphors. The optimal sample exhibited a high activation energy of 0.25 eV and exceptional luminous thermal stability. The fabricated red LED is capable of satisfying the photic requirements that are essential for the growth and development of plants. The chromaticity coordinate of the packaged white light-emitting diode (w-LED) was found to be (0.321, 0.322), which places it within the white light area. Additionally, the LaNb₂VO₉:30 mol%Eu³⁺ phosphor offers a lucid and comprehensive visualization of the I-III properties of fingerprints. These findings suggest that LaNb₂VO₉:Eu³⁺ phosphors have promising potential as red-light components for w-LEDs, plant cultivation LEDs and latent fingerprint detection applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116476"},"PeriodicalIF":4.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898409","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":"Unveiling dual emission in powder form of acridone-amine derivatives and efficient OLEDs with 12% EQE","authors":"Komal Vasant Barhate ,&nbsp;Mohammad Amir Ahemad ,&nbsp;Juhi Dutta ,&nbsp;Sangita Bose ,&nbsp;Neeraj Agarwal","doi":"10.1016/j.jphotochem.2025.116468","DOIUrl":"10.1016/j.jphotochem.2025.116468","url":null,"abstract":"<div><div>Fluorescence-based organic light-emitting diodes (OLEDs) are explicitly appealing due to their extended operational lifetimes, high color purity of electroluminescence, and unmatched potential for low-cost manufacturing in next-generation full-colour display and lighting applications. Here, we designed N-substituted acridone-dibenzoazepine derivatives (<strong>Aze-Me-Acr</strong> and <strong>Aze-Anisyl-Acr)</strong>. Twisted electron rich dibenzoazepine provides limited rotation at donor–acceptor bond. Both, <strong>Aze-Me-Acr</strong> and <strong>Aze-Anisyl-Acr</strong> show solvent polarity dependent fluorescence in a range of 490 to 525 nm at room temperature (RT), whereas at 77 K, triplet emission at around 620 nm was observed having life time of ∼435–547 ms. Both these emitters showed dual emission <em>i.e.</em>, fluorescence and phosphorescence in powder form. Fluorescence was observed at 550 &amp; 544 nm while phosphorescence was seen at 670 &amp; 655 nm, respectively for <strong>Aze-Me-Acr</strong> and <strong>Aze-Anisyl-Acr</strong>. Long excited lifetimes in the range of 8 to 15 μs were found in red region (&gt;600 nm). OLEDs with <strong>Aze-Me-Acr</strong> and <strong>Aze-Anisyl-Acr</strong> as active emitters were also fabricated which showed green (CIE: 0.28, 0.65) and yellowish green (CIE: 0.39, 0.56) electroluminescence, respectively. Doped devices of <strong>Aze-Me-Acr</strong> in CBP blend resulted in high external quantum efficiency (EQE) of 12.8 %.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116468"},"PeriodicalIF":4.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924849","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":"Ruthenium-modified TiO2 photocatalysts for hydrogen generation from water splitting and simultaneous CO2 photoreduction","authors":"Joanna Kapica-Kozar ,&nbsp;Ewelina Kusiak-Nejman ,&nbsp;Konrad Sobczuk ,&nbsp;Agnieszka Wanag ,&nbsp;Waldemar Bednarski ,&nbsp;Katarzyna Ćmielewska ,&nbsp;Ewa Ekiert ,&nbsp;Iwona Pełech ,&nbsp;Daniel Sibera ,&nbsp;Piotr Staciwa ,&nbsp;Marcin Gano ,&nbsp;Urszula Narkiewicz ,&nbsp;Antoni W. Morawski","doi":"10.1016/j.jphotochem.2025.116477","DOIUrl":"10.1016/j.jphotochem.2025.116477","url":null,"abstract":"<div><div>TiO₂ modification with Ruthenium red heated at 400 °C as an effective method of obtaining chlorine-free photocatalysts for CO₂ reduction to valuable chemicals with higher photoactivity then commercial TiO₂ P25 was presented. The results showed an influence of Ru modification on significant decrease of the E_g of TiO₂ samples (with the Ru increase). The created by ruthenium some oxygen defects and the of Ti³⁺ sites are crucial for photoactivity in H₂ generation and CO₂ reduction. The relative free electron concentrations in the oxygen vacancies in TiO₂ samples were influenced by Ru. The highest concentration of unpaired electrons in oxygen vacancies and oxygen radicals occurs for samples containing 0.1 and 0.25 % Ru. Very weak signals attributed to Ti³⁺ were recorded for Ru 0.5 % and Ru 1 % samples. All modified samples exhibit high selectivity to hydrogen and TiO₂+0.25%Ru sample was the most effective in photocatalytic water splitting producing H₂, as well as CO and CH₄ production. Additionally, good reproducibility was found for this sample.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116477"},"PeriodicalIF":4.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917385","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":"Lipophilic quaternary ammonium-functionalized BODIPY photosensitizers for mitochondrial-targeted photodynamic therapy and fluorescence cell imaging","authors":"Arrhon Mae Bongo ,&nbsp;Jinki Shim ,&nbsp;Sung Cho ,&nbsp;Joomin Lee ,&nbsp;Ho-Joong Kim","doi":"10.1016/j.jphotochem.2025.116469","DOIUrl":"10.1016/j.jphotochem.2025.116469","url":null,"abstract":"<div><div>A series of three amphiphilic, mitochondria-targeting cationic boron-dipyrromethene (BODIPY) photosensitizers were synthesized and evaluated for their fluorescence cell imaging and photodynamic therapy (PDT) capabilities. The synthesis involved the reaction of azide-functionalized BODIPY with N,N,N-dimethyloctyl-N-propargyl ammonium bromide via copper-catalyzed azide-alkyne cycloaddition (CuAAC), yielding BODIPYs with hydrophilic cationic regions and lipophilic properties that facilitated mitochondrial targeting. Halogenation of the BODIPY core at the 2 and 6 positions with bromine and iodine reduced fluorescence quantum yields but significantly enhanced singlet oxygen generation due to the heavy atom effect. The dark toxicity and PDT efficacy of these cationic BODIPY photosensitizers were evaluated against two cancer cell lines (MCF-7 and HeLa). Conjugation of the BODIPY backbone with a positively charged, lipophilic octyl ammonium group improved hydrophilicity and facilitated mitochondrial localization, as confirmed by cellular uptake studies. LED light irradiation at the targeted location enhanced cytotoxicity in cancer cells, demonstrating the potential of these photosensitizers for effective anticancer PDT. This study highlights quaternary ammonium-functionalized BODIPY derivatives as promising candidates for photodynamic therapy.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116469"},"PeriodicalIF":4.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906541","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":"Copper(II) ion-modified ZSM-5/TiO2 composite material for photocatalytic degradation of ammonia gas","authors":"Jiaming Zhu ,&nbsp;Renli Qi ,&nbsp;Kun Tian ,&nbsp;Shuhang Lu ,&nbsp;Shihua Pu ,&nbsp;Yue Jian","doi":"10.1016/j.jphotochem.2025.116472","DOIUrl":"10.1016/j.jphotochem.2025.116472","url":null,"abstract":"<div><div>Ammonia gas (NH₃), as a malodorous gas, has an irritating and corrosive effect on the upper respiratory tract of humans or animals. In this work, we successfully synthesized copper(II) (Cu(II)) ion-modified Zeolite Socony Mobil–5 (ZSM-5) and TiO₂ composite material (Cu/ZSM-5/TiO₂, <strong>CZT</strong>). This composite material, compared to <strong>ZSM-5</strong> and anatase-TiO₂ (<strong>A-TiO₂</strong>) themselves, had a wide absorption range, a large specific surface area, and strong light harvesting and charge transfer capabilities. Due to the abundant Lewis acid active sites on the <strong>CZT</strong> surface, it was applied to the photocatalytic degradation of alkaline malodorous NH₃. The <strong>CZT</strong> composite catalyst showed excellent photocatalytic performance, and it could degrade NH₃ with a concentration of 30 mg/m³ in less than 20 min. Moreover, the <strong>CZT</strong> catalyst exhibited good stability. Importantly, NH₃ was mineralized into nitrate anions, achieving the harmless treatment of NH₃ gas.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116472"},"PeriodicalIF":4.1,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898407","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":"Near-infrared fluorescent probes based on tetrahydroacridine moiety with large Stokes shifts for monitoring mitochondrial viscosity during autophagy","authors":"Hong-Xia Wang ,&nbsp;Xu-Rong Liu ,&nbsp;Hui Wang ,&nbsp;Wen-Pei Ni ,&nbsp;Jian-Feng Ge ,&nbsp;Xu Xu ,&nbsp;Ru Sun","doi":"10.1016/j.jphotochem.2025.116473","DOIUrl":"10.1016/j.jphotochem.2025.116473","url":null,"abstract":"<div><div>Motivated by the demand for near-infrared fluorescent probes in monitoring variations in the intracellular microenvironment, three semi-cyanine near-infrared fluorescent probes with viscosity sensitivity were designed based on the D-π-A structure in this paper. The probes <strong>1a-c</strong> consisted of a 1, 2, 3, 4-tetrahydroacridine moiety and an electron-donating group coumarin unit or <em>N,N</em>-diethylphenyl, linked by carbon–carbon double bonds. Optical experiments revealed NIR emission wavelengths (663–809 nm) with large Stokes shifts (132–275 nm) in different solvents, which would reduce the interference of background fluorescence in biological imaging. Moreover, they presented viscosity dependence in the range of 0.89–856 cP, exhibiting nearly OFF-ON fluorescence responses. In addition, the probes had mitochondrial targeting properties and it was verified that the probes could monitor the fluctuations of mitochondrial viscosity during autophagy in HeLa cells in real time by modeling starvation and drug induction (nystatin, rapamycin). Therefore, the outstanding features of probes <strong>1a-c</strong> might provide potential implications for the early diagnosis of various diseases induced by changes in abnormal mitochondrial viscosity.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116473"},"PeriodicalIF":4.1,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898408","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":"Decomposition behavior of acetal-protected dissolution inhibitors with and without PEB in chemically amplified three-component novolac resists","authors":"Katsuaki Takashima,&nbsp;Hideo Horibe","doi":"10.1016/j.jphotochem.2025.116459","DOIUrl":"10.1016/j.jphotochem.2025.116459","url":null,"abstract":"<div><div>Chemically amplified three-component novolac resists consist of novolac resin, photoacid generator, and dissolution inhibitor that is deprotected by acid. In this study, we synthesized dissolution inhibitors protected by acetals with different decomposability and investigated the relationship between the decomposability of the acetals and the resist sensitivity. At low post-exposure bake (PEB) temperatures, the higher the decomposability of the acetals, the higher the resist sensitivity. However, at high PEB temperatures, the resist sensitivity order was not the same as at lower PEB temperatures. At high temperature PEB, the decomposition of acetal is accelerated by the volatilization of the decomposition products, so the lower the boiling point of the decomposition products, the higher the sensitivity of the resist. The change in decomposition property with temperature was also supported by FT-IR. This suggests that the sensitivity of resists using acetal depends not only on the decomposition characteristics of acetal but also on the volatility of the deprotection product at PEB.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116459"},"PeriodicalIF":4.1,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917386","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":"Degradation of fluoroquinolone antibiotic levofloxacin by UV-induced ferric ion photolysis in aqueous medium: The role of pH and chelation","authors":"Jelena Korać Jačić ,&nbsp;Ivan Spasojević ,&nbsp;Danica Bajuk-Bogdanović ,&nbsp;Slađana Savić ,&nbsp;Dragana Bartolić ,&nbsp;Dragana Maglić ,&nbsp;Milica Milenković","doi":"10.1016/j.jphotochem.2025.116470","DOIUrl":"10.1016/j.jphotochem.2025.116470","url":null,"abstract":"<div><div>The increased use of fluoroquinolone antibiotic levofloxacin (LVX) contributes to its significant presence as a pollutant in water and soil environments and the consequent need for developing efficient water processing methods for its degradation and removal. The understanding of coordination and photo-chemistry of LVX in the presence of ferric ions enables potential improvements of iron-based advanced oxidation processes (AOPs) for wastewater treatment. Herein, the pH-dependence of LVX chelation with ferric ions was investigated by UV–Vis and fluorescence spectroscopy at pH 2, pH 5, and pH 7. The results obtained for examined pHs showed pH 5 as optimal for forming LVX-Fe³⁺ complex. The formation of LVX-Fe³⁺ complex makes coordinated LVX more susceptible to oxidation. Photosensitivity of LVX and LVX/Fe³⁺ system to UV irradiation was examined at acidic pHs, using UV–Vis spectroscopy and HPLC analysis. In acidic aqueous solutions, LVX remains unchanged after UV irradiation, while the presence of ferric ions promotes its UV-induced photodegradation. The investigated UV/Fe(III)-based AOP for degradation of LVX showed the best performance at pH 5 in the presence of Fe³⁺ ions in excess due to LVX-Fe³⁺ complex formation and sufficient amount of Fe³⁺–OH⁻ species available for photolysis and production of OH^• radical.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116470"},"PeriodicalIF":4.1,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894776","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}