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.
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Supported by the National Natural Science Foundation of China(Nos.21673289, 21273282, 21673288).
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Zhang, D., Tan, L., Dong, J. et al. Structure and Excitation Dynamics of β-Carotene Aggregates in Cetyltrimethylammonium Bromide Micelle. Chem. Res. Chin. Univ. 34, 643–648 (2018). https://doi.org/10.1007/s40242-018-7379-8
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DOI: https://doi.org/10.1007/s40242-018-7379-8