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International Journal of Photoenergy
Volume 3, Issue 2, Pages 79-87
http://dx.doi.org/10.1155/S1110662X01000095

Photoinduced charge separation and recombination under distance, orientation, and spin controlled conditions

1Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, Amsterdam 1018 WS , The Netherlands
2School of Chemistry, University of New South Wales, Sydney 2052, Australia

Copyright © 2001 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Great efforts have been made to mimic the efficient photoinduced charge separation and concomitant 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 molecular 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 multiplicity 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.