华中科技大学学报（自然科学版）2025，Vol.53Issue(9)：65-71,7.DOI:10.13245/j.hust.250778
3,4,5-三甲氧基肉桂酸激发态动力学研究
Study on excited state dynamics of 3,4,5-trimethoxycinnamic acid
摘要
Abstract
The excited state dynamics of 3,4,5-trimethoxycinnamic acid were studied by femtosecond time-resolved transient absorption spectroscopy and quantum chemical calculations.It was found that the steady-state absorption spectrum of 3,4,5-trimethoxycinnamic acid covers a wide range of UVB(ultraviolet radiation b)regions.The molecule is photoexcited to the S2 state by ultraviolet light,and undergoes a rapid internal conversion process through the S2/S1 conical intersection with a time constant of 0.3ps in methanol solution.Accompanied by vibrational cooling process of 5.2 ps,the molecule finally undergoes a trans-cis photoisomerization reaction with a time constant of 47 ps.The research results show that the 3,4,5-trimethoxycinnamic acid can quickly convert the excessive energy of ultraviolet radiation into molecular vibrations efficiently,indicating great potential on UV protection.关键词
光异构化/飞秒瞬态吸收/3,4,5-三甲氧基肉桂酸/光防护/激发态动力学/量子化学计算Key words
photoisomerization/femtosecond transient absorption/photoprotection/3,4,5-trimethoxycinnamic acid/excited state dynamics/quantum chemical calculations分类
生物科学引用本文复制引用
陈浩东,张旭,张嵩,李多多,魏政荣..3,4,5-三甲氧基肉桂酸激发态动力学研究[J].华中科技大学学报（自然科学版）,2025,53(9):65-71,7.基金项目
国家自然科学基金资助项目(12074109) （12074109）
湖北省自然科学基金创新群体项目(2024AFA038) （2024AFA038）
教育部"春晖计划"资助项目(HZKY20220335). （HZKY20220335）
