title: Two photon absorption energy transfer in the light-harvesting complex of photosystem II (LHC-II) modified with organic boron dye.
abstract: The plant light-harvesting complexes of photosystem II (LHC-II) play important roles in collecting solar energy and transferring the energy to the reaction centers of photosystems I and II. A two photon absorption compound, 4-(bromomethyl)-N-(4-(dimesitylboryl)phenyl)-N-phenylaniline (DMDP-CH2Br), was synthesized and covalently linked to the LHC-II in formation of a LHC-II-dye complex, which still maintained the biological activity of LHC-II system. Under irradiation with femtosecond laser pulses at 754 nm, the LHC-II-dye complex can absorb two photons of the laser light effectively compared with the wild type LHC-II. The absorbed excitation energy is then transferred to chlorophyll a with an obvious fluorescence enhancement. The results may be interesting and give potentials for developing hybrid photosystems.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Hu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Feng
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: g1704@iccas.ac.cn.
authors.forename: Shuangqing
authors.initials: S
authors.lastname: Wang
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Shayu
authors.initials: S
authors.lastname: Li
authors.affiliation: Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. Electronic address: yangch@ibcas.ac.cn.
authors.forename: Chunhong
authors.initials: C
authors.lastname: Yang
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: gqyang@iccas.ac.cn.
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Yang
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods; D000814:Aniline Compounds / Q000737:chemistry*; D001896:Boron Compounds / Q000737:chemistry*; D002734:Chlorophyll / Q000737:chemistry*; D005453:Fluorescence; D045332:Photosystem II Protein Complex / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D001896:Boron Compounds; D045332:Photosystem II Protein Complex; D002734:Chlorophyll
keywords: Energy transfer; LHC-II; Light-harvesting complex of photosystem II; Organic boron dye; Two photon absorption