Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 22, Pages 6532-6535Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201802555
Keywords
chloroplasts; photophosphorylation; photosynthesis; quantum dots; Stokes shift
Categories
Funding
- National Nature Science Foundation of China [21433010, 21320102004, 21573248, 21273250]
- Youth Innovation Promotion Association of CAS [2016032]
- Institute of Chemistry, CAS [Y6290512B1]
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A natural artificial hybrid system was constructed to enhance photophosphorylation. The system comprises chloroplasts modified with optically matched quantum dots (chloroplast-QD) with a large Stokes shift. The QDs possess a unique optical property and transform ultraviolet light into available and highly effective red light for use by chloroplasts. This,favorable feature enables photosystem. II contained within the hybrid system to split more water and produce more protons than chloroplasts would otherwise do on their own. Consequently, a larger proton gradient is generated and photophosphorylation is improved. At optimal efficiency activity increased by up to 2.3 times compared to pristine chloroplasts Importantly, the degree of overlap between emission of the QDs and absorption of chloroplasts exerts a strong influence on the photophosphorylation efficiency. The chloroplast-QD hybrid presents an efficient solar energy conversion route, which involves a rational combination of a natural system and an artificial light-harvesting nano-material.
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