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A detailed theoretical study on the excited-state hydrogen-bonding dynamics and the proton transfer mechanism for a novel white-light fluorophore

文献类型：期刊论文

作者Gao, Haiyan1; Yang, Guang2; Jia, Min1; Song, Xiaoyan1; Zhang, Qiaoli1; Yang, Dapeng1,3
刊名Journal of the chinese chemical society
出版日期2019
卷号66期号:1页码:56-61
关键词Frontier molecular orbital Infrared spectra Intramolecular hydrogen bond Potential energy curves Proton transfer
ISSN号0009-4536
DOI10.1002/jccs.201800045
通讯作者Gao, haiyan(hygao0371@163.com)
英文摘要In this work, density functional theory (dft) and time-dependent dft (tddft) methods were used to investigate the excited-state dynamics of the excited-state hydrogen-bonding variations and proton transfer mechanism for a novel white-light fluorophore 2-(4-[dimethylamino]phenyl)-7-hyroxy-6-(3-phenylpropanoyl)-4h-chromen-4-one (1). the methods we adopted could successfully reproduce the experimental electronic spectra, which shows the appropriateness of the theoretical level in this work. using molecular electrostatic potential (mep) as well as the reduced density gradient (rdg) versus the product of the sign of the second largest eigenvalue of the electron density hessian matrix and electron density (sign[(2)]), we demonstrate that an intramolecular hydrogen bond o1-h2o3 should be formed spontaneously in the s-0 state. by analyzing the chemical structures, infrared vibrational spectra, and hydrogen-bonding energies, we confirm that o1-h2o3 should be strengthened in the s-1 state, which reveals the possibility of an excited-state intramolecular proton transfer (esipt) process. on investigating the excitation process, we find the s-0 s-1 transition corresponding to the charge transfer, which provides the driving force for esipt. by constructing the potential energy curves, we show that the esipt reaction results in a dynamic equilibrium in the s-1 state between the forward and backward processes, which facilitates the emission of white light.
WOS关键词INTRAMOLECULAR CHARGE-TRANSFER ; FLUORESCENCE ; SOLVENT ; SINGLE ; GENERATION ; SOLVATION ; TDDFT
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
语种英语
WOS记录号WOS:000459598500007
出版者WILEY-V C H VERLAG GMBH
URI标识http://www.irgrid.ac.cn/handle/1471x/2372781
专题大连化学物理研究所
通讯作者Gao, Haiyan
作者单位1.North China Univ Water Resources & Elect Power, Sch Math & Stat, Zhengzhou 450046, Henan, Peoples R China
2.Jiaozuo Univ, Basic Teaching Dept, Jiaozuo, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam Theoret & Computat, Dalian, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Haiyan,Yang, Guang,Jia, Min,et al. A detailed theoretical study on the excited-state hydrogen-bonding dynamics and the proton transfer mechanism for a novel white-light fluorophore[J]. Journal of the chinese chemical society,2019,66(1):56-61.
APA Gao, Haiyan,Yang, Guang,Jia, Min,Song, Xiaoyan,Zhang, Qiaoli,&Yang, Dapeng.(2019).A detailed theoretical study on the excited-state hydrogen-bonding dynamics and the proton transfer mechanism for a novel white-light fluorophore.Journal of the chinese chemical society,66(1),56-61.
MLA Gao, Haiyan,et al."A detailed theoretical study on the excited-state hydrogen-bonding dynamics and the proton transfer mechanism for a novel white-light fluorophore".Journal of the chinese chemical society 66.1(2019):56-61.

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