Article
Spectroscopy
Wenbin Hu, Rui Zhang, Xian-Fu Zhang, Jiatian Liu, Lin Luo
Summary: This study systematically examines the formation of singlet oxygen, excited triplet state, and excited singlet state for halogenated BODIPY photosensitizers in different solvents, and reveals the influence of halogen atoms and solvent on these properties. The heavy atom effect in halogenated BODIPY promotes the formation of the triplet state, while solvent polarity affects the formation of singlet oxygen.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Optics
Lixin Zang, Huibin Wang, Zongxue Wang, Shumin Wang, Miaomiao Yu, Qi Kang, Guizheng Zou, Huimin Zhao
Summary: This study reveals the competition between the triplet state of metalloporphyrins and surrounding oxygen, and regulates the phosphorescence intensity and singlet oxygen generation efficiency by using imidazole as a triplet protector.
JOURNAL OF LUMINESCENCE
(2022)
Review
Chemistry, Inorganic & Nuclear
Xue Zhang, Xi Chen, Jianzhang Zhao
Summary: Electron spin control is a novel strategy to prolong the lifetime of charge transfer states by generating a triplet state instead of the traditional singlet state. The forbidden electron feature of charge recombination compared to the allowed electron spin prolongs the charge transfer state lifetime.
DALTON TRANSACTIONS
(2021)
Review
Chemistry, Multidisciplinary
Van-Nghia Nguyen, Yuxin Yan, Jianzhang Zhao, Juyoung Yoon
Summary: Photodynamic therapy (PDT) has great potential for cancer treatment due to its spatiotemporal selectivity and noninvasive nature, but the lack of ideal photosensitizers hinders its full potential. Developing advanced smart photosensitizers without heavy atoms has shown significant progress in better meeting the clinical requirements of PDT.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Ezel Ozturk Gunduz, Hande Eserci Gurbuz, Berkan Tasasiz, Elif Yildiz Gul, Esra Tanriverdi Ecik, Elif Okutan
Summary: This research focuses on the development of new photocatalysts that are active under light and suitable for organic reactions. Novel benzyl-, naphthalimide (NI)-, and carbazole (CB)-BODIPY derivatives were synthesized and characterized. These compounds exhibited strong absorption bands, moderate fluorescence characters, and good singlet-oxygen-generating abilities, making them effective photocatalysts. They were also used in the synthesis of juglone, achieving a high production yield in a short reaction time.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Spectroscopy
Wenbin Hu, Mingyue Fan, Xian-Fu Zhang, Mengmeng Li, Guoying Li
Summary: meso-RNH substituted BODIPY compounds with different substituents (R = C3H7, C4H9, PhCH2, H, and Ph) were synthesized to investigate their photophysical properties and photosensitizing abilities. UV-vis absorption, fluorescence spectroscopy, laser flash photolysis, and chemical trapping methods were employed to measure various parameters. The results show that the presence of meso-RNH leads to blue shift of absorption and emission wavelength, decrease in fluorescence quantum yield and lifetime, and increase in singlet oxygen formation. The mechanisms include photoinduced charge transfer, S0 and S1 geometry, and ground state structural isomerization. These findings are valuable for designing new functional materials.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Multidisciplinary Sciences
Duy Khuong Mai, Chanwoo Kim, Joomin Lee, Temmy Pegarro Vales, Isabel Wen Badon, Koushitak De, Sung Cho, Jaesung Yang, Ho-Joong Kim
Summary: By modifying the substituents in lactose-modified BODIPY photosensitizers, the photophysical properties and photodynamic anticancer activities of the sensitizers can be controlled. The substituents have different effects on fluorescence and singlet oxygen generation capability.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Meng Lv, Xueli Wang, Danhong Wang, Xiuhua Li, Yangyi Liu, Haifeng Pan, Sanjun Zhang, Jianhua Xu, Jinquan Chen
Summary: When organic electron donor and acceptor chromophores are linked together, electron transfer state can occur. In compact organic chromophores, the most common decay pathway for the charge transfer state is charge recombination, leading to either longer wavelength fluorescence emission or non-radiative dissipation of excited state energy.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Dili R. Subedi, Ryan Reid, Patrick F. D'Souza, Vladimir N. Nesterov, Francis D'Souza
Summary: A series of Pt and Pd porphyrins with different substituents were synthesized and characterized. The study revealed that aromatic substituents can minimize steric hindrance, resulting in higher electrochemical redox gaps. Additionally, Pt and Pd porphyrins exhibited higher quantum yields in generating singlet oxygen.
Article
Engineering, Environmental
Limiao Cai, Qian Yao, Xiaodong Du, Jiayi Zhong, Haijian Lu, Xueqin Tao, Jiangmin Zhou, Zhi Dang, Guining Lu
Summary: A 1O2 system using FFA as a probe was constructed to discuss the quenching, interference elimination, and pollutant degradation ability of 1O2. The results revealed the influence of quencher dosage and ability on quenching, and provided a method to judge the interruption of 1O2 production.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Elena Bassan, Yasi Dai, Daniele Fazzi, Andrea Gualandi, Pier Giorgio Cozzi, Fabrizia Negri, Paola Ceroni
Summary: A new BODIPY derivative (o-I-BDP) containing an iodine atom in the ortho position of the meso-linked phenyl group was prepared. It was found that o-I-BDP displays phosphorescence while maintaining the electrochemical properties of unsubstituted BODIPYs. Theoretical investigations shed light on the influence of iodine position on electronic and photophysical properties.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Review
Chemistry, Multidisciplinary
Huifang Shi, Wei Yao, Wenpeng Ye, Huili Ma, Wei Huang, Zhongfu An
Summary: Organic phosphorescence refers to the radiative transition between different spin states of an organic molecule after excitation. It has a long emission lifetime, large Stokes shift, and rich excited state properties, making it highly attractive in the field of organic electronics. Ultralong organic phosphorescence (UOP) is a persistent luminescence phenomenon in organic phosphors, with an emission lifetime typically exceeding 100 milliseconds. To achieve and enhance UOP, it is necessary to enhance spin-orbit coupling to facilitate the transition of excitons from the excited singlet state to the triplet state, and to suppress nonradiative transitions from the excited triplet state.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Optics
Jose Chavez, Joseph Kimball, Luca Ceresa, Emma Kitchner, Tanya Shtoyko, Rafal Fudala, Julian Borejdo, Zygmunt Gryczynski, Ignacy Gryczynski
Summary: The study revealed that the fluorescence intensity of 5-BrI in PVA film is low, while its phosphorescence shows similarities to indole in PVA, but with some differences. By comparing various spectra and quantum yields, we were able to determine the rate constants for the excited state deactivation process of 5-BrI in PVA film.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Christopher Schad, Edurne Avellanal-Zaballa, Esther Rebollar, Cesar Ray, Eduardo Duque-Redondo, Florencio Moreno, Beatriz L. Maroto, Jorge Banuelos, Inmaculada Garcia-Moreno, Santiago De la Moya
Summary: We proposed a new approach for achieving triplet-triplet annihilation-assisted photon upconversion by the rational design of an all-organic molecular assembly. This design takes advantage of the synthetic accessibility and chemical versatility of COO-BODIPY scaffold. Laser-induced photophysical characterization and computational simulations were used to understand and control the energy transfer efficiency between triplet states. Theoretical simulations also demonstrated the importance of the new photoactivable chromophoric design for enhancing photon upconversion.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Arruri Sathyanarayana, Francois Reveret, Laurent Jouffret, Damien Boyer, Genevieve Chadeyron, Federico Cisnetti
Summary: A series of coordination polymers were obtained directly from imidazolium chlorides bearing bulky nitrogen donors, showing a simple, eco-friendly, robust, and reproducible synthetic procedure. The polymeric species displayed remarkable stability and retained their photoluminescence properties even after thermal treatment.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Wiem Bouali, Muejgan Yaman, Nurgul Seferogu, Zeynel Seferogu
Summary: Novel chemosensors, including coumarin hydrazide, were synthesized and demonstrated the ability to detect cyanide ions through absorption and fluorescence turn-off response. The reaction mechanism between the sensors and the ions was determined through experimental and theoretical studies. The sensors exhibited high detection ability and effectiveness.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Parinaz Abdollahian, Hassan Heidari, Soheila Hassanzadeh, Mohammad Hasanzadeh
Summary: This study successfully synthesized various types of thiolated-graphene quantum dots (GQDs) and utilized them in a one-droplet microfluidic paper-based analytical device for the simultaneous multi-sensing of heavy metal ions. The GQDs were functionalized and stabilized on the surface of hydrophobic fiber-glass, enabling colorimetric chemosensing of ions including iron, copper, cobalt, mercury, chrome, manganese, and nickel. The results were confirmed using fluorescence spectrometry, and the platform showed potential for facile metal ion detection in human urine models and environmental fluids.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
S. L. Barrett, C. Meyer, E. Cwiklik, V Fieglein, M. Burns, J. Guerrero, W. J. Brittain
Summary: Laboratory illumination is strong enough to create a photostationary state (PSS) of amphiphilic azo-benzene compounds in water. The [cis]PSS/[trans]PSS ratios were observed to be 0.33-1.2 in D2O and 0.37-3.8 in dimethyl sulfoxide-d6. ortho-Fluoroazobenzene amphiphiles show higher cis-isomer concentration at equilibrium compared to non-fluorinated compounds due to differences in optical absorption profiles. The kinetics of isomerization were measured using UV-Vis spectroscopy and the ratio of trans-to-cis rates does not directly correlate with the observed PSS. The half-life for PSS formation is 40 minutes for fluorinated compounds and 80 minutes for non-fluorinated compounds.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Jalil Khodayari, Karim Zare, Omid Moradi, Mohammadreza Kalaee, Niyaz Mohammad Mahmoodi
Summary: In this study, an eco-friendly biocomposite (CMC/MIL/CuO) was synthesized and characterized, and its ability to decolorize Acid Blue 92 dye was investigated. The results showed that CMC/MIL/CuO can be used as a suitable photocatalyst for dye decolorization.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Bo Ma, Qian Xu, Huajun Yao, Yalin Chen, Yiyang Wang, Yunfei Yang, Hongfang Shen, Youjun Lu
Summary: This study designed an integrated structure of Cu2O@Au/Cu2O heterostructure particles, which achieved significantly enhanced photocatalytic performance by simultaneously considering the integrated structural characteristics and localized surface plasmon resonance (LSPR) effect. Experimental characterization and theoretical simulation confirmed the three-in-one synergy of the integrated heterostructure, including the LSPR effect of Au nanoparticles, the light scattering based on core-shell heterostructure, and the effective charge separation based on inter-embedded heterostructure. The concept of integrated heterostructure cooperated with LSPR effect provides a new strategy for designing future catalysts.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Robert G. H. Marks, Sarah P. Rockel, Klaus Kerpen, Holger Somnitz, Philipp R. Martin, Maik A. Jochmann, Torsten C. Schmidt
Summary: This study investigated the pH-dependent photolysis of phosphonates in aqueous solutions and analyzed the transformation products. The results showed that the photolysis rate of phosphonates was influenced by pH and light conditions. Furthermore, the carbon kinetic isotope effects varied for different types of phosphonates.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
T. M. Naren Vidaarth, S. Surendhiran, K. S. G. Jagan, S. Savitha, K. S. Balu, A. Karthik, B. Kalpana
Summary: In this study, magnesium oxide nanoparticles were synthesized using plant seed extracts, which exhibited excellent performance in removing dyes from textile water bodies. These nanoparticles also showed strong antibacterial and antioxidant properties.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Mikhail Yu. Ovchinnikov, Vyacheslav A. Antipin, Sergey L. Khursan
Summary: In this study, the recombination of separated ion-radical states (SIRS) in PAPh films was analyzed, and it was found that the contribution of X-SIRS recombination to total luminescence varies with different environments. It was also shown that the recombination of labile SIRS is independent of the nature of the atmosphere. The study theoretically substantiated that SIRS recombination can occur via the transfer of both positive and negative charges, and the efficiency of thermal activation of recombination processes depends on the ratio of radiant and conductive channels of energy transfer.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Sumaira Naeem, Tayyaba Mubashir, Mudassir Hussain Tahir, Jawayria Najeeb, Ahmed Z. Dewidar, Hosam O. El-ansary, Silas Lagat, Anthony Pembere
Summary: This study presents an alternative methodology using machine learning for the selection of novel organic molecules to develop high-performance organic solar cell devices.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
D. Thirumoolan, S. Ragupathy, S. Renukadevi, P. Rajkumar, Rajakumar S. Rai, R. M. Saravana Kumar, Imran Hasan, Mani Durai, Young-Ho Ahn
Summary: In this study, the photodegradation of brilliant green dye was studied in relation to the comparative photocatalytic activity of pure ZnO and Ni-doped ZnO/CSAC. The Ni-doped ZnO/CSAC showed a higher photocatalytic degradation rate under visible light irradiation, suggesting its potential as an effective wastewater treatment material.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Ajmal Khan, Zhidong Chang, Wenjun Li, Xiaohui Ma, Mei Dong, Liang Geng, Ghulam Yasin, Shuaib Khan, Hira Anwar
Summary: Due to its functional structure and tunable shape, 2D zeolitic imidazole framework (ZIFs) have gained significant interest in various fields. In this study, thin ZIF-8 sheets were prepared using a mixed solvent and then delaminated into single layers through physical sonication. These hexagonal sheets exhibited high stability and controlled morphology, and showed excellent performance in dye degradation compared to 3D ZIF-8 crystals.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Vitaly A. Podshibyakin, Evgenii N. Shepelenko, Leonid D. Popov, Tatyana M. Valova, Anton O. Ayt, Lyudmila G. Kuzmina, Anton V. Lisovin, Oleg N. Burov, Mikhail E. Kletskii, Alexander D. Dubonosov, Vladimir A. Bren
Summary: Bifunctional hybrids containing photochromic indolyl(thienyl) diarylethenes and an ionochromic rhodamine moiety connected by a dimethylene spacer were synthesized. These hybrids exhibit absorption at 450-455 nm and fluorescence at 560 nm in toluene. UV light triggers ring-closed non-fluorescent diarylethene formation, which can be reversed under visible light or in the dark. In the presence of H+ cation, a naked eye effect is observed with the opening of the rhodamine-spirolactam ring and a pink-crimson coloration at 561 nm accompanied by intense long-wavelength emission at 586 nm. This process is reversible by exposure to triethylamine, as confirmed by NMR experiments. The light-induced isomerizations and proton-induced transformations were explained using computational methods. Reversible switching of fluorescent properties can be achieved by light irradiation and proton.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Majid Sharifi-Rad, Hazem S. Elshafie, Pawel Pohl
Summary: The study investigated the synthesis of silver nanoparticles using Lallemantia royleana leaf extract, characterized their physico-chemical properties, and evaluated their biopharmaceutical and catalytic applications. The synthesized nanoparticles showed good stability and exhibited higher antioxidant, antimicrobial, anti-inflammatory, anti-arthritic, and cytotoxic activities compared to the leaf extract. These results provide a promising green synthesis route for silver nanoparticles with potential biomedical and catalytic applications.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Meera Moydeen Abdul Hameed, Badr M. Thamer
Summary: Security encoding using photochromism is an effective method for creating authentication substrates. A unique photochromic ink has been developed that emits light continuously under UV rays and darkness. The ink is produced by dispersing lanthanidedoped aluminate nanoparticles in a polymer binder. The resulting composite ink can be used to create transparent films on paper, and the stamped patterns become visible under UV rays, changing from colorless to green.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Monika Lamoria, Rita Kakkar, Marilyn Daisy Milton
Summary: Four novel water-soluble benzimidazolium and bis-benzimidazolium salts with a fluorophore-spacer-receptor design were synthesized and demonstrated to selectively detect Fe3+ ions with large Stokes shifts. The binding mechanism and detection performance were investigated through theoretical and experimental studies.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)