Photoinduced charge separation and recombination under distance, orientation, and spin controlled conditions
Photoinduced charge separation and recombination under distance, orientation, and spin controlled conditions
复制标题
距离、方向和自旋控制条件下的光生电荷分离和重组
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. Paddon
中科院分区：
文献类型：
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作者：
J. Verhoeven;M. Paddon
人们付出了巨大的努力来通过人工（超）分子结构来模拟自然光合作用系统的有效光致电荷分离和伴随的能量存储，以及设计具有在分子电子电路中应用的潜在用途的分子。这种分子的紧密堆积会带来单独分子组分之间的短路和串扰问题。在本文中，将研究通过使用饱和烃（烷烃）型绝缘结构来防止这种短路的极限。此外，如下所示，几种典型的分子尺度操作原理，例如轨道对称性和自旋多重性控制，可以实现快速有效的电荷分离与非常缓慢的电荷重组相结合的系统，即使 D（受体）部分和 A（受体）部分之间的距离非常小。
Great efforts have been made to mimic the efficient photoinduced charge separation and con- comitant energy storage of natural photosynthetic systems via artificial (supra)molecular constructs as well as to design molecules with potential use for application in molecular electronic circuits. Close packing of such molecules introduces the problem of short-circuiting and cross talk between the separate molecu- lar components. In the present paper the limits will be investigated to which such short-circuiting can be prevented by the use of saturated hydrocarbon (alkane) type insulating structures. Furthermore, as will be shown, several typically molecular scale operating principles such as orbital symmetry and spin multiplic- ity control can allow the realisation of systems in which fast and efficient charge separation is combined with very slow charge recombination even when the distance between the D(onor) and A(cceptor) moieties is very small.