title: Resonance Raman spectroscopic and theoretical investigation of the excited state proton transfer reaction dynamics of 2-thiopyridone.
abstract: The resonance Raman spectra were obtained for both 2-thiopyridone (2TP) and its proton-transfer tautomer 2-mercaptopyridine (2MP) in water solution. Density functional theory (DFT) calculations were carried out to help elucidate their ultraviolet electronic transitions and vibrational assignments of the resonance Raman spectra associated with their B-band absorptions. The nanosecond time-resolved resonance Raman spectroscopic experiment was carried out to further confirm the assignment that the transient species was the ground state 2MP. The different short-time structural dynamics were examined for both 2TP and 2MP in terms of their resonance Raman intensity patterns. The transition barriers between 2TP and 2MP for S(0), T(1), and S(1) states are determined by using (U)B3LYP-TD and CASSCF level of theory computations, respectively. The excited state proton transfer (ESPT) reaction mechanism is proposed and briefly discussed.
authors: Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China.
authors: Rui
authors: R
authors: Du
authors: Chong
authors: C
authors: Liu
authors: Yanying
authors: Y
authors: Zhao
authors: Ke-Mei
authors: KM
authors: Pei
authors: Hui-Gang
authors: HG
authors: Wang
authors: Xuming
authors: X
authors: Zheng
authors: Mingde
authors: M
authors: Li
authors: Jia-Dan
authors: JD
authors: Xue
authors: David Lee
authors: DL
authors: Phillips