Miller Rebekah A, Presley Andrew D, Francis Matthew B
Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.
J Am Chem Soc. 2007 Mar 21;129(11):3104-9. doi: 10.1021/ja063887t. Epub 2007 Feb 24.
A new protein-based approach has been developed for the construction of light-harvesting systems through self-assembly. The building blocks were prepared by attaching fluorescent chromophores to cysteine residues introduced on tobacco mosaic virus coat protein monomers. When placed under the appropriate buffer conditions, these conjugates could be assembled into stacks of disks or into rods that reached hundreds of nanometers in length. Characterization of the system using fluorescence spectroscopy indicated that efficient energy transfer could be achieved from large numbers of donor chromophores to a single acceptor. Energy transfer is proposed to occur through direct donor-acceptor interactions, although degenerate donor-to-donor transfer events are also possible. Three-chromophore systems were also prepared to achieve broad spectrum light collection with over 90% overall efficiency. Through the combination of self-organizing biological structures and synthetic building blocks, a highly tunable new method has emerged for the construction of photovoltaic device components.
一种基于蛋白质的新方法已被开发出来，用于通过自组装构建光捕获系统。构建模块是通过将荧光发色团连接到烟草花叶病毒衣壳蛋白单体上引入的半胱氨酸残基来制备的。当置于适当的缓冲条件下时，这些缀合物可以组装成盘状堆叠或长度达到数百纳米的棒状结构。使用荧光光谱对该系统进行表征表明，可以实现从大量供体发色团到单个受体的高效能量转移。尽管简并供体到供体的转移事件也是可能的，但能量转移被认为是通过直接的供体 - 受体相互作用发生的。还制备了三发色团系统，以实现总体效率超过90%的广谱光收集。通过自组织生物结构和合成构建模块的结合，一种用于构建光伏器件组件的高度可调谐新方法应运而生。
