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- [21] Tuning the Intrinsic Photophysical Properties of Chlorophyll a[J]. CHEMISTRY-A EUROPEAN JOURNAL, 2017, 23 (32) : 7728 - 7736Wellman, Sydney M. J.Jockusch, Rebecca A.
Concentration Effect on Quenching of Chlorophyll a Fluorescence by All-Trans-β-Carotene in Photosynthesis
被引：15
作者：
Chen, Chen
[1
]
Gong, Nan
[1
]
Li, Zuowei
[1
]
Sun, Chenglin
[2
]
Men, Zhiwei
[1
]
机构：
[1] Jilin Univ, Coll Phys, Coherent Light & Atom & Mol Spect Lab, Changchun 130012, Jilin, Peoples R China
[2] Jilin Univ, Coll Phys, Key Lab Phys & Technol Adv Batteries, Changchun 130012, Jilin, Peoples R China
来源：
基金：
中国国家自然科学基金;
关键词：
Chl-a;
fluorescence;
beta-Car;
quenching;
HARVESTING COMPLEX-II;
ENERGY-TRANSFER;
ANTENNA PROTEIN;
SPECTROSCOPY;
STATE;
PHOTOPROTECTION;
ABSORPTION;
MOLECULE;
SINGLET;
D O I：
10.3390/molecules22101585
中图分类号：
Q5 [生物化学];
Q7 [分子生物学];
学科分类号：
071010 ;
081704 ;
摘要：
Absorption, fluorescence spectra of chlorophyll a (Chl-a) and all-trans-beta-carotene (beta-Car) mixing solution are investigated in different polarity and polarizability solvents. The carotenoids regulate the energy flow in photosynthesis by interaction with chlorophyll, leading to an observable reduction of Chl-a fluorescence. The fluorescence red shifts with the increasing solvent polarizability. The energy transfer in the Chl-a and beta-Car system is proposed. The electron transfer should be dominant in quenching Chl-a fluorescence rather than the energy transfer in this system. Polar solvent with large polarizability shows high quenching efficiency. When dissolved in carbon tetrachloride, Chl-a presents red shift of absorption and blue shift of fluorescence spectra with increasing beta-Car concentration, which implies a Chl-a conformational change.
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页数：7
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