发光学报2024，Vol.45Issue(4)：671-680,10.DOI:10.37188/CJL.20240028
N,N-二甲基-6-丙酰-2-萘胺氢键复合物激发态超快动力学研究
Ultrafast Excited State Dynamics Investigation of N,N-dimethyl-6-propionyl-2-naphthylamine Hydrogen-bonded Complexes
摘要
Abstract
Suppressing the formation of twisted intramolecular charge transfer(TICT)can markedly improve the flu-orescence intensity and photostability of luminescent materials.However,accurate methods for predicting the pres-ence of TICT are currently lacking.This paper investigated the excited state dynamics of N,N-dimethyl-6-propionyl-2-naphthylamine(PRODAN)across various solvents utilized the Kamlet-Taft theory,coupled with both steady-state and transient absorption spectroscopy,complemented by quantitative calculations.The analysis of steady-state spectra re-vealed that the primary determinant of the Stokes redshift in the PRODAN complexes is the solvent's polarity and hydro-gen-donating capacity.Transient absorption spectra provided insights into fast timescales(τ1 and τ2),corresponding to the formation of intramolecular charge transfer and TICT processes,while slower timescales(τ3 and τ4)were associat-ed with solvation and fluorescence radiation processes.Furthermore,experimental findings demonstrated that an in-crease in solvent polarity and hydrogen-donating ability expeditiously influences the dynamics processes within PRO-DAN hydrogen-bonded complexes.Theoretical computations solidified these observations,confirming the formation of a stable TICT state in highly polar and strongly hydrogen-donating methanol solvent.These insights not only contribute to our understanding of the ultrafast dynamics of PRODAN but also provide valuable guidance for the strategic design of fluorescent probe molecules and thoughtful solvent selection in the field of fluorescence research.关键词
扭转分子内电荷转移/激发态动力学/瞬态吸收光谱/量化计算Key words
twisted intramolecular charge transfer/excited state dynamics/transient absorption spectroscopy/quantum chemical calculation分类
数理科学引用本文复制引用
葛晶,薛丙乾,李智彪,肖静,白西林..N,N-二甲基-6-丙酰-2-萘胺氢键复合物激发态超快动力学研究[J].发光学报,2024,45(4):671-680,10.基金项目
国家自然科学基金(21903050) （21903050）
山西省留学人员科技活动择优资助项目(20220024)Supported by National Natural Science Foundation of China(21903050) （20220024）
Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province(20220024) （20220024）
