Investigation of Excited State Intramolecular Proton Transfer and Structural Dynamics in Bis-Benzimidazole Derivative (BBM) Using Femtosecond Stimulated Raman Spectroscopy

doi:10.20944/preprints202304.0894.v1

	Investigation of Excited State Intramolecular Proton Transfer and Structural Dynamics in Bis-Benzimidazole Derivative (BBM) Using Femtosecond Stimulated Raman Spectroscopy
	Xie, Junhan1 ; Wang, Ziyu1 ; Zhu, Ruixue1 ; Jiang, Jiaming1 ; Weng, Tsu-Chien1 ; Ren, Yi1 ; Han, Shuhua 3; Huang, Yifan1 ; Liu, Weimin1,2
	2023-04-25
状态	已发表
摘要	Bis-benzimidazole derivative (BBM) molecule, consisting of two 2-(2'-Hydroxyphenyl) benzimidazole (HBI) halves, has been synthesized and successfully utilized as a ratiometric fluorescence sensor for the sensitive detection of Cu2+ based on enol-keto excited state intramolecular proton transfer (ESIPT). In this study, we strategically implement femtosecond stimulated Raman spec-troscopy and several time-resolved electronic spectroscopies, aided by quantum chemical calcula-tions to investigate the detailed primary photodynamics of BBM molecule. The results demonstrate that the ESIPT from BBM-enol* to BBM-keto* was observed in only one of HBI halves with a time constant of 300 fs, after that, the rotation of the dihedral angle between two HBI halves generate a planarized BBM-keto* isomer in 3 ps, leading to dynamics red shift of BBM-keto* emission.
关键词	excited state intramolecular proton transfer structural dynamics transient absorption femtosecond fluorescence up-conversion femtosecond stimulated Raman spectroscopy
DOI	10.20944/preprints202304.0894.v1
相关网址	查看原文
出处	Preprints
WOS记录号	PPRN:67070790
WOS类目	Chemistry, Physical
资助项目	Natural Science Foundation of Shanghai[
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/348135
专题	物质科学与技术学院物质科学与技术学院_PI研究组_刘伟民组物质科学与技术学院_PI研究组_黄逸凡组物质科学与技术学院_PI研究组_任毅组物质科学与技术学院_博士生大科学中心_PI研究组_翁祖谦组大科学中心_公共科研平台_大科学装置建设部
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 2.STU & SIOM Joint Lab Superintense Lasers & Applicat, Shanghai 201210, Peoples R China 3.Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China
推荐引用方式 GB/T 7714	Xie, Junhan,Wang, Ziyu,Zhu, Ruixue,et al. Investigation of Excited State Intramolecular Proton Transfer and Structural Dynamics in Bis-Benzimidazole Derivative (BBM) Using Femtosecond Stimulated Raman Spectroscopy. 2023.