New Insight into the Photoprotection Mechanism of Plant Sunscreens: Adiabatic Relaxation Competing with Nonadiabatic Relaxation in the cis -> trans Photoisomerization of Methyl Sinapate

doi:10.1021/acs.jpclett.9b01651

	New Insight into the Photoprotection Mechanism of Plant Sunscreens: Adiabatic Relaxation Competing with Nonadiabatic Relaxation in the cis -> trans Photoisomerization of Methyl Sinapate
	Zhao, Xi 1,2; Luo, Jian 2; Yang, Songqiu 2; Han, Keli 2,3
刊名	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
	2019-08-01
卷号	10 期号:15 页码:4197-4202
ISSN号	1948-7185
DOI	10.1021/acs.jpclett.9b01651
通讯作者	Han, Keli(klhan@dicp.ac.cn)
英文摘要	A great deal of thermally instable cis form photoisomerization products will be formed from the thermally stable trans form of the plant sunscreens sinapate esters upon ultraviolet radiation. To reveal the photoisomerization mechanism of the cis-isomer, we explore the photodynamics of a model plant sunscreen methyl sinapate (MS) in the cis form in organic solution. The high photoisomerization quantum yield of the cis-isomer results in the relatively higher photostability of trans-MS. By utilizing femtosecond transient absorption spectroscopy and quantum chemical calculation, we propose that an adiabatic relaxation competes with nonadiabatic relaxation for the excited-state cis form of methyl sinapate. These results suggest that the photoprotection mechanism of the cis form of sinapate esters is significantly different from that of the trans form of sinapate esters and plays an important role in the overall photoprotection effect.
资助项目	National Natural Science Foundation of China[21833009] ; National Natural Science Foundation of China[21533010] ; National Natural Science Foundation of China[21703244] ; National Natural Science Foundation of China[21403226] ; National Key Research and Development Program of China[2016YFE0120900] ; National Key Research and Development Program of China[2017YFA0204800] ; DICP[ZZBS201703] ; DICP[DMTO201601] ; Science Challenging Program[JCKY2016212A501]
WOS关键词	EXCITED-STATE DYNAMICS ; HULA-TWIST ; METHOXY METHYLCINNAMATE ; DENSITY FUNCTIONALS ; ISOMERIZATION ; ACID
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000487181400008
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; DICP ; DICP ; Science Challenging Program ; Science Challenging Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; DICP ; DICP ; Science Challenging Program ; Science Challenging Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; DICP ; DICP ; Science Challenging Program ; Science Challenging Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; DICP ; DICP ; Science Challenging Program ; Science Challenging Program
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/172677]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Han, Keli
作者单位	1.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 2.Chinese Acad Sci, DICP, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China 3.Shandong Univ, Inst Mol Sci & Engn, Qingdao 266237, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xi,Luo, Jian,Yang, Songqiu,et al. New Insight into the Photoprotection Mechanism of Plant Sunscreens: Adiabatic Relaxation Competing with Nonadiabatic Relaxation in the cis -> trans Photoisomerization of Methyl Sinapate[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2019,10(15):4197-4202.
APA	Zhao, Xi,Luo, Jian,Yang, Songqiu,&Han, Keli.(2019).New Insight into the Photoprotection Mechanism of Plant Sunscreens: Adiabatic Relaxation Competing with Nonadiabatic Relaxation in the cis -> trans Photoisomerization of Methyl Sinapate.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,10(15),4197-4202.
MLA	Zhao, Xi,et al."New Insight into the Photoprotection Mechanism of Plant Sunscreens: Adiabatic Relaxation Competing with Nonadiabatic Relaxation in the cis -> trans Photoisomerization of Methyl Sinapate".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 10.15(2019):4197-4202.