期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 125, 期 33, 页码 9572-9578出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.1c05809
关键词
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资金
- National Natural Science Foundation of China [21873068, 21573229, 21422309]
- Open Research Funds of State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics (Wuhan Institute of Physics and Mathematics of Chinese Academy of Sciences)
- Double First-Rate and Peiyang Scholar Projects (Tianjin University)
- Open Research Funds of State Key Laboratory of Bioelectronics (Southeast University)
- Frontier Science Project of the Knowledge Innovation Program of Chinese Academy of Sciences (CAS)
- Project for Excellent Member of CAS Youth Innovation Promotion Association
A novel sunscreen molecule FPPO-HBr was reported in this study, which addressed the issues of traditional sunscreen molecules by utilizing excited-state intramolecular proton transfer pathway. The newly synthesized FPPO-HBr showed excellent photostability and was found to be resistant to trans-cis photoisomerization.
Nowadays, traditional sunscreen molecules face many adverse problems: single energy relaxation pathway, lack of adequate UVA light protection, and therefore no longer meeting the growing demand for UVA protection. In this work, we reported a novel sunscreen molecule (E)-3-(5-bromofuran-2-yl)-1-(2-hydroxyphenyl)prop-2-en-1-one (here-inafter referred to as FPPO-HBr) which tackled adverse problems of traditional sunscreen molecules as single energy relaxation pathway, lacking effective UVA light protection. Various nonradiative pathways were proposed and verified by combining the steady-state and femtosecond transient absorption (FTA) spectroscopy and theoretical calculation. Upon UV excitation, the FPPO-HBr mainly decays via excited-state intramolecular proton transfer (ESIPT) followed by conformation twist in ultrafast manner. Importantly, H-1 NMR spectra proved that the FPPO-HBr could not undergo trans-cis photoisomerization. Additionally, excellent photostability was also observed for newly synthesized FPPO-HBr. The current work could provide new perspectives for sunscreen molecules synthesis and mechanism.
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