Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Angew Chem Int Ed Engl. 2018 May 28;57(22):6532-6535. doi: 10.1002/anie.201802555. Epub 2018 May 2.
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 nanomaterial.
构建了一种自然-人工杂化系统以增强光磷酸化作用。该系统包含经过光学匹配的量子点（叶绿体-QD）修饰的叶绿体，具有较大的斯托克斯位移。量子点具有独特的光学特性，可将紫外光转化为可用且高效的红光供叶绿体使用。这一有利特征使杂化系统内的光系统 II 能够比叶绿体自身分裂更多的水并产生更多的质子。因此，产生更大的质子梯度并改善光磷酸化作用。与原始叶绿体相比，在最佳效率下，活性最高可提高 2.3 倍。重要的是，量子点的发射与叶绿体的吸收之间的重叠程度对光磷酸化效率有很强的影响。叶绿体-QD 杂化系统提供了一种有效的太阳能转换途径，它涉及到自然系统和人工光捕获纳米材料的合理组合。
