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Charge transfer emission between π- and 4f-orbitals in a trivalent europium complex.
Commun Chem
January 2025
Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
Photoinduced metal-to-ligand (or ligand-to-metal) charge-transfer (CT) states in metal complexes have been extensively studied toward the development of luminescent materials. However, previous studies have mainly focused on CT transitions between d- and π-orbitals. Herein, we report the demonstration of CT emission from 4f- to π-orbitals using a trivalent europium (Eu(III)) complex, supported by both experimental and theoretical analyses.
View Article and Find Full Text PDFDegradation of antibiotic pollutants and simultaneous CO capture over hollow MnO/light/peroxymonosulfate (PMS)-CaO system.
J Colloid Interface Sci
January 2025
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China. Electronic address:
Antibiotic organic pollutants not only pose a significant threat to human health but also generate a large amount of carbon dioxide (CO) during the treatment process of advanced oxidation processes (AOPs). Herein, the antibiotics aqueous solution was firstly degraded and mineralized by light-assisted peroxymonosulfate (PMS) activation over hollow manganese dioxide (MnO) catalyst and then the corresponding released CO was effectively captured by calcium oxide (CaO) particles in the same sealed reactor, achieving wastewater treatment with zero carbon releasing. Under simulated light conditions, hollow MnO is excited to generate electron-hole pairs.
View Article and Find Full Text PDFUltrafast Charge Carrier Dynamics in Vanadium Dioxide, VO: Nonequilibrium Contributions to the Photoinduced Phase Transitions.
J Phys Chem Lett
January 2025
Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, United States.
Vanadium oxide (VO) is an exotic phase-change material with diverse applications ranging from thermochromic smart windows to thermal sensors, neuromorphic computing, and tunable metasurfaces. Nonetheless, the mechanism responsible for its metal-insulator phase transition remains a subject of vigorous debate. Here, we investigate the ultrafast dynamics of the photoinduced phase transition in VO under low perturbation conditions.
View Article and Find Full Text PDFPhotoinduced stereoselective reactions using pyridinium salts as radical precursors.
Chem Commun (Camb)
January 2025
Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi 110-016, India.
Pyridinium salts are amine surrogates that are abundant in nature and the redox active nature of the pyridinium salts allows them to serve as precursors for generating radical species under mild conditions that can be initiated by light, heat or metal catalysis. The stereoselective formation of products has always been a topic of interest for synthetic chemists worldwide. In this context, pyridinium salts can readily undergo single electron reduction to form a neutral radical, and the N-X bond's subsequent fragmentation furnishes the X radical without any harsh reaction conditions.
View Article and Find Full Text PDFPaired Photoproduction of H2O2 and 3,4-Dihydroisoquinoline over Covalent Pyrene-(Thio)urea Frameworks with Electron Push-Pull Effect.
Angew Chem Int Ed Engl
January 2025
Shanghai Institute of Ceramics Chinese Academy of Sciences, State Key Laboratory of High Performance Ceramics and Superfine Microstructure, CHINA.
Pairing photocatalytic 1,2,3,4-tetrahydroisoquinoline semi-dehydrogenation reaction (THIQ-SDR) with two-electron oxygen reduction reaction (2e- ORR) is a green solar to chemical strategy by simultaneously utilizing the photo-excited electrons and holes. However, it is still short of high-efficiency photocatalyst to drive two reactions above. In the present work, crystalline pyrene-thiourea/urea covalent organic frameworks (COF-Py-S and -O) were synthesized and demonstrated as high-performance metal-free photocatalysts.
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