Structure and Excitation Dynamics of β-Carotene Aggregates in Cetyltrimethylammonium Bromide Micelle

doi:10.1007/s40242-018-7379-8

Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (4): 643-648.doi: 10.1007/s40242-018-7379-8

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Structure and Excitation Dynamics of β-Carotene Aggregates in Cetyltrimethylammonium Bromide Micelle

ZHANG Di, TAN Liming, DONG Jia, YI Jiaqiang, WANG Peng, ZHANG Jianping

Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China

Received:2017-11-27 Online:2018-08-01 Published:2018-02-12
Contact: WANG Peng E-mail:wpeng@iccas.ac.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21673289, 21273282, 21673288).

Abstract

Abstract: The β-carotene(β-Car) aggregate was prepared by self-assembly in cetyltrimethylammonium bromide (CTAB) micelle. The ground state absorption measurement showed that the aggregate has J-type characteristics and resonance Raman spectra gave the intrinsic explanation of molecular interaction in aggregate. Upon excitation at the optical allowed S₂ state of aggregate, direct generation of triplet state via singlet fission(SF) mechanism was observed. Excitation dynamics was elucidated by fs-transient absorption spectroscopy and ns-flash photolysis, respectively. The triplet state life time of aggregate was found to be independent of the ambient oxygen molecules.

Key words: β-Carotene aggregate, Cetyltrimethylammonium bromide micelle, Singlet fission, Triplet state, Excitation state dynamics

ZHANG Di, TAN Liming, DONG Jia, YI Jiaqiang, WANG Peng, ZHANG Jianping. Structure and Excitation Dynamics of β-Carotene Aggregates in Cetyltrimethylammonium Bromide Micelle[J]. Chemical Research in Chinese Universities, 2018, 34(4): 643-648.

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Structure and Excitation Dynamics of β-Carotene Aggregates in Cetyltrimethylammonium Bromide Micelle

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