Journal of Photochemistry and Photobiology A-chemistry最新文献_第10页

Photoluminescent property, mechanistic and crystallographic studies on novel (Z)-5,6-dihydrodibenzo[b,f]azocine AIEgens

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-27 DOI: 10.1016/j.jphotochem.2025.116293

Wen-Chao Xiong , Yan-Xue Li , Hao-Yuan Zhang , Shan-Shan Gong , Shouzhi Pu , Rongwei Shi , Qi Sun

{"title":"Photoluminescent property, mechanistic and crystallographic studies on novel (Z)-5,6-dihydrodibenzo[b,f]azocine AIEgens","authors":"Wen-Chao Xiong , Yan-Xue Li , Hao-Yuan Zhang , Shan-Shan Gong , Shouzhi Pu , Rongwei Shi , Qi Sun","doi":"10.1016/j.jphotochem.2025.116293","DOIUrl":"10.1016/j.jphotochem.2025.116293","url":null,"abstract":"<div><div>A series of four novel (Z)-5,6-dihydrodibenzo[b,f]azocine AIEgens (DHDBA-1–4) featuring a flexible non-aromatic eight-membered ring fused with two rigid aromatic rings were designed and synthesized. All of these π-conjugated polycyclics exhibited typical AIE properties with excellent solid-state fluorescence quantum yields ranging from 33.2 % to 67.6 %. Theoretical calculations revealed that DHDBA-1–4 adopt a unique tub conformation in solutions and their excitations have both locally excited (LE) and charge transfer (CT) characters. As exemplified by DHDBA-1, the low molar absorption coefficient and energetically accessible S0/S1 minimum energy conical intersection (MECI) were identified as the two major causes for the poor photoluminescent properties of DHDBA compounds in solution phase. In solid state, DHDBA compounds was found to adopt more planar conformations. The more effective excitation and prohibition of structural deformation that leads to S0/S1 surface crossing open the radiative decay channel. Crystallographic analysis illustrated that the flexibility of the central dihydroazocine core enables the DHDBA compounds to exist in multiple conformations in crystal lattice. The absence of π–π stacking and presence of abundant weak intermolecular interactions in the single crystals well explain their high solid-state fluorescence quantum yields.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116293"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142925","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

A sensitive colorimetric and “OFF-ON” fluorescent sensor for cyanide ions based on ESIPT-AIE mechanism from a fluorene-hydroxybenzaldehyde Schiff base

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-27 DOI: 10.1016/j.jphotochem.2025.116295

Hossein Reza Darabi, Amin Ghaemi, Kioumars Aghapoor, Farshid Mohsenzadeh, Hani Sayahi, Ramo Nazarian

{"title":"A sensitive colorimetric and “OFF-ON” fluorescent sensor for cyanide ions based on ESIPT-AIE mechanism from a fluorene-hydroxybenzaldehyde Schiff base","authors":"Hossein Reza Darabi, Amin Ghaemi, Kioumars Aghapoor, Farshid Mohsenzadeh, Hani Sayahi, Ramo Nazarian","doi":"10.1016/j.jphotochem.2025.116295","DOIUrl":"10.1016/j.jphotochem.2025.116295","url":null,"abstract":"<div><div>(E)-2-(((9H-Fluoren-2-yl)imino)methyl)phenol (FIP) is an ortho-hydroxy aromatic imine Schiff base that exhibits intramolecular hydrogen bonding. Its spectral characteristics, including absorption and fluorescence, were analyzed in solvents of varying polarities. FIP exhibited selective recognition of cyanide ions (CN−) in a DMF/H2O buffer (7:3) at pH 7, showing significant changes in both absorption and “OFF-ON” fluorescent emission in the presence of competing anions. 1H NMR and FT-IR studies indicate that the interaction with CN− and OH− involves a deprotonation process, leading to the formation of the keto tautomer of FIP, which plays a crucial role in the OFF-ON emission response: the ESIPT-ICT process is activated by OH−, while the ESIPT-AIE process is triggered by CN−. Notably, FIP exhibits high sensitivity for CN− in fluorescent detection, with a limit of detection (LOD) of 6.5 nM, significantly lower than the absorbance detection (LOD = 97 nM). The sensor’s key attributes include selectivity, rapid response time, a large Stokes shift, and the ability to monitor CN− levels in tap water, making it a user-friendly option for on-site applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116295"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142931","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

Highly efficient photocatalytic inactivation of flowing bioaerosol by using visible light-assisted titanium-based composite: Application and mechanism

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-25 DOI: 10.1016/j.jphotochem.2025.116287

Xiaoxuan Liu , Dafei Yu , Yujun Wang , Na Li , Kuo Wang , Yingnan Yang , Na Liu

{"title":"Highly efficient photocatalytic inactivation of flowing bioaerosol by using visible light-assisted titanium-based composite: Application and mechanism","authors":"Xiaoxuan Liu , Dafei Yu , Yujun Wang , Na Li , Kuo Wang , Yingnan Yang , Na Liu","doi":"10.1016/j.jphotochem.2025.116287","DOIUrl":"10.1016/j.jphotochem.2025.116287","url":null,"abstract":"<div><div>Some pathogenic microorganisms can survive and spread as bioaerosols which is a serious threat to human health. Hence, a visible light-assisted photocatalytic inactivation system for bioaerosol inactivation was constructed based on the novel P/Ag/Ag2O/Ag3PO4/TiO2 (PAgT) composite photocatalyst. The highest inactivation efficiency for 108 CFU/m3 Escherichia coli bioaerosol could reach 99.3 % within just 14.1 s under visible light irradiation. The effect of various operational conditions on photocatalytic inactivation efficiency were investigated, including light intensity, bioaerosol concentration and residence time. Furthermore, during the bioaerosol inactivation process, the changes of cell morphology and intracellular reactive oxygen species were clarified. The oxidizing substances h+, <img>O2− and <img>OH produced on the surface of the photocatalyst under the irradiation of visible light were the direct cause of cell oxidizing damage. It disrupted cell membrane permeability and cause an increase in intracellular reactive oxygen species, ultimately leading to cell death. The system possessed an irreversible and efficient photocatalytic bioaerosol sterilization ability toward different airborne pathogenic bacteria, including Gram-positive and Gram-negative bacteria. In addition, the PAgT photocatalytic system demonstrated good cyclability and stability for bioaerosol inactivation, providing a promising strategy to reduce the airborne pathogenic microbial contamination, especially for indoor or occupied space.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116287"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142536","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

Functionalized sulfonic acid groups enhance solubility and stability of graphene quantum dots for efficient photosynthesis of lettuce

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116280

Junjie Yuan , Zongli Yang , Jiayi Zou , Zhongqiu Wu , Zhaolong Wang , Liang Wang , Wenlong Shen , Quan Zhang , Hui Xu

{"title":"Functionalized sulfonic acid groups enhance solubility and stability of graphene quantum dots for efficient photosynthesis of lettuce","authors":"Junjie Yuan , Zongli Yang , Jiayi Zou , Zhongqiu Wu , Zhaolong Wang , Liang Wang , Wenlong Shen , Quan Zhang , Hui Xu","doi":"10.1016/j.jphotochem.2025.116280","DOIUrl":"10.1016/j.jphotochem.2025.116280","url":null,"abstract":"<div><div>Graphene quantum dots exhibit outstanding fluorescence properties, low cytotoxicity, and exceptional biocompatibility when interacting with plant cells, showcasing significant potential for photosynthesis of plants, such as lettuce. However, the poor dispersion and stability in aqueous solutions have hindered its photosynthetic efficiency. To address this issue, this work demonstrated the sulfonic acid group functionalized graphene quantum dots (SAG-GQDs), in which the sulfonic acid group prominently increased hydrophilicity, thus leading to an enhanced dispersion and stability of SAG-GQDs for efficient lettuce photosynthesis. Results indicated that the functionalized SAG-GQDs with spraying concentration of 3600 mg/L displayed the best photosynthetic efficiency for lettuce growth, including net photosynthetic rate of 8.6 μmol CO2 m−2 s−1, increased leaf fresh weight of 36%, and nutritional 14 mg/g soluble sugar with biocompatibility availability. Our work suggests the feasibility of functionalized sulfonic acid group in regulating dispersion and stability of graphene quantum dots for promoting photosynthetic efficiency of lettuce plants.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116280"},"PeriodicalIF":4.1,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142540","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

Synthesis, photophysical properties and fluorescent application of novel [1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one derivatives

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116294

Suya Gan , Li-Xin Gao , Zitong Cao , Chun Zhang , Yiqiu Fu , Wen-Long Wang

引用次数: 0

Fluorometric detection of Hg2+ via metal displacement of BODIPY-Fe(III) complex in aqueous media

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116291

Pornthip Piyanuch , Jirapat Santatiwongchai , Sarawoot Impeng , Anyanee Kamkaew , Suttipong Wannapaiboon , Kantapat Chansaenpak

{"title":"Fluorometric detection of Hg2+ via metal displacement of BODIPY-Fe(III) complex in aqueous media","authors":"Pornthip Piyanuch , Jirapat Santatiwongchai , Sarawoot Impeng , Anyanee Kamkaew , Suttipong Wannapaiboon , Kantapat Chansaenpak","doi":"10.1016/j.jphotochem.2025.116291","DOIUrl":"10.1016/j.jphotochem.2025.116291","url":null,"abstract":"<div><div>A selective and sensitive fluorogenic chemosensor based on Fe3+-BODIPY complex (BPH-Fe) was developed for the specific binding toward Hg2+ in aqueous system. This sensor reveals rapid recognition and simple detection of Hg2+ via metal displacement approach. The BPH-Fe complex showed excellently selective chelation to Hg2+ and was not affected by other interfering metal ions. This developed sensor exhibited the quenching of green fluorescence emission along with yellow to orange color change upon exposure to Hg2+ ion. The stoichiometric ratio of BPH-Fe complex to Hg2+ was established to be 1:1 by Job’s method. The detection limit of the sensor in the determination of Hg2+ was calculated as 1.8 ppb, which is lower than WHO and U.S. EPA allowable level (2 ppb). The X-ray absorption spectroscopy (XAS) probed at Hg L3-edge and Fe K-edge revealed the metal displacement of Fe3+ in BPH-Fe complex to form BPH-Hg2+ complex upon sensing process. Furthermore, BPH-Fe had been successfully employed to determine Hg2+ in living cancer cells.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116291"},"PeriodicalIF":4.1,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142927","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

Nanoshell-mediated color tuning of erbium-sensitized upconversion nanoparticles for advanced phototherapy above 1500 nm

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116285

Tonghan Zhao , Dengke Song , Jing Wang , Huadong Chen, Wenqian Chen, Xiaohui Zhu

{"title":"Nanoshell-mediated color tuning of erbium-sensitized upconversion nanoparticles for advanced phototherapy above 1500 nm","authors":"Tonghan Zhao , Dengke Song , Jing Wang , Huadong Chen, Wenqian Chen, Xiaohui Zhu","doi":"10.1016/j.jphotochem.2025.116285","DOIUrl":"10.1016/j.jphotochem.2025.116285","url":null,"abstract":"<div><div>Conventional phototherapy, including photodynamic therapy (PDT) and photothermal therapy (PTT), is often limited by the risk of serious photodamage and shallow tissue caused by the excitation light. Lanthanide-doped upconversion nanoparticles (UCNPs) enable to convert long-wavelength light to short-wavelength emission, which, in principle, can address these issues in phototherapy. However, traditional UCNPs are mainly excitable in the near-infrared I region (700–900 nm), which still faces challenges such as strong light absorption/scattering and overheating side effects. Herein, we have developed an Er3+-sensitized upconversion nanoparticle (NaErF4@NaYbF4@NaYF4) in response to 1550 nm excitation light in the far NIR-II region. Through a core–shell–shell engineering strategy, the emissive signal of Er3+ ion can be finely tailored from red-dominant to green-dominant, offering great flexibility in optical tuning of Er3+ sensitized UCNPs under 1550 nm light excitation. Upon surface modification by a mesoporous silica shell and loading of dual photosensitive agents (MC540 (merocyanine 540) and FePc (iron phthalocyanine)), a synergistic PDT/PTT phototherapeutic nanoagent was constructed. Results showed that as-developed nanotherapeutic platform could solve the overheating problem and further enhance tissue penetration upon illumination by 1550 nm light, thus demonstrating great efficiency of combinational PDT/PTT for tumor treatment.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116285"},"PeriodicalIF":4.1,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142935","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

Fluorescent tetrazolylpyrene unnatural nucleoside in sensing BSA protein

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-22 DOI: 10.1016/j.jphotochem.2025.116290

Subhendu Sekhar Bag , Hiranya Gogoi , Sujata Roy , Manoj Kumar Pradhan , Sangita Talukdar

引用次数: 0

Synthesis of novel Ce3+ doped NaLi2PO4 UV-A emitting phosphor

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-22 DOI: 10.1016/j.jphotochem.2025.116289

Sanjeev Kumar , Manveer Singh , Siddhartha , Kuldeep Kumar , Bhawani Shankar , Nimmi Singh

{"title":"Synthesis of novel Ce3+ doped NaLi2PO4 UV-A emitting phosphor","authors":"Sanjeev Kumar , Manveer Singh , Siddhartha , Kuldeep Kumar , Bhawani Shankar , Nimmi Singh","doi":"10.1016/j.jphotochem.2025.116289","DOIUrl":"10.1016/j.jphotochem.2025.116289","url":null,"abstract":"<div><div>Ce3+ doped NaLi2PO4 orthophosphate material was successfully synthesized via the solid-state diffusion method. The phase purity of synthesized phosphor was confirmed by Powder X-ray Diffraction (PXRD). Elemental analysis and surface morphology of phosphor material were analyzed by Field Emission Scanning Electron Microscope (FE-SEM) and Energy Dispersive X-Ray Spectroscopy (EDX) respectively. In addition, chemical states and their elemental bonding of material were investigated by X-ray Photoelectron Spectroscopy (XPS). Whereas Diffuse Reflectance Spectra (DRS) is utilized to examine the optical energy band gap of NaLi2PO4 and NaLi2PO4:Ce3+ phosphors. First principle study was employed to explain the energy band gap deviation between the theoretical and experimental results of phosphors. Fluorescence properties of NaLi2PO4:Ce3+ phosphor (0.0 to 0.3 mol %) were studied at excitation wavelength of 277 nm. NaLi2PO4:Ce3+phosphor exhibited intense emission peaks centred at 335 and 360 nm due to spin orbit splitting of 2F5/2 and 2F7/2. Beyond the optimal limit of dopant ions, non-radiative energy transfer phenomena occurred due to dipole–dipole interaction between the acceptor and the donor. Minimum stokes shift between the excitation and emission bands of phosphor leads it to persistent UV emission. These properties of NaLi2PO4:Ce3+ phosphor predicts its possible use in the development of UV-A phosphor LEDs.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116289"},"PeriodicalIF":4.1,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142534","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}

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Synthesis of red carbon quantum dots with solvatochromic properties as a selective luminescence probe of MnO4−

IF 4.1 3区化学

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-21 DOI: 10.1016/j.jphotochem.2025.116288

Wen-Xin Chu , Xiao-Min Tang , Fei-Yang Lu , Bao-Li An , Ji-Ming Zhang , Xiao-Hong Wang , Yue-Ling Bai , Jiaqiang Xu

{"title":"Synthesis of red carbon quantum dots with solvatochromic properties as a selective luminescence probe of MnO4−","authors":"Wen-Xin Chu , Xiao-Min Tang , Fei-Yang Lu , Bao-Li An , Ji-Ming Zhang , Xiao-Hong Wang , Yue-Ling Bai , Jiaqiang Xu","doi":"10.1016/j.jphotochem.2025.116288","DOIUrl":"10.1016/j.jphotochem.2025.116288","url":null,"abstract":"<div><div>Red efficient luminescent carbon quantum dots are still difficult to be synthesized. In this work, red carbon quantum dots (RCQDs) isopropanol solution with quantum yield of 43.9 % have been synthesized using isopropanol as carbon source and solvent, N1-phenylbenzene-1,2,4-triamine as carbon and nitrogen source. The solvothermal synthesis was catalyzed surprisingly by SnO2 nanoparticles, the optimal synthesis temperature was lowered to 130 °C, and the optimal synthesis time was reduced to 1 h. Moreover, the RCQDs nanoparticles showed excellent solvatochromic properties. The maximum emission wavelength for RCQDs in N, N-dimethylformamide dilute solution blue shifted to 504 nm, and the maximum emission wavelengths for RCQDs in acetone, isopropanol, dimethyl sulfoxide and water solutions were in the range of 592 nm ∼ 624 nm. The reason was investigated by the in-situ infrared absorption spectra. MnO4− ions could be selectively detected using RCQDs in PBS buffer solution (pH = 5.0), the linear range of MnO4− concentration was 0.1 μM ∼ 2.0 μM. This work provides a new synthesis method of efficient red carbon quantum dots, and it supplies a friendly candidate for detection of MnO4− ions in water.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116288"},"PeriodicalIF":4.1,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142936","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