Scaling laws for charge transfer in multiply bridged donor/acceptor molecules in a dissipative environment

  • Posted on: 10 July 2014
  • By: admin
TitleScaling laws for charge transfer in multiply bridged donor/acceptor molecules in a dissipative environment
Publication TypeJournal Article
Year of Publication2007
AuthorsGoldsmith R.H, Wasielewski M.R, Ratner M.A
JournalJournal of the American Chemical Society
Volume129
Pagination13066-13071
Date PublishedOct 31
ISBN Number0002-7863
Accession NumberISI:000250818900041
Keywordsconductance, dynamics, excitonic coherence, range electron-transfer, systems, time, transfer rates, transport, tunneling paths, wires
Abstract

The ability of multiple spatial pathways to sum coherently and facilitate charge transfer is examined theoretically. The role of multiple spatial pathways in mediating charge transfer has been invoked several times in the recent literature while discussing charge transfer in proteins, while multiple spatial pathways are known to contribute to charge transport in metal-molecule-metal junctions. We look at scaling laws for charge transfer in donor-bridge-acceptor (D-B-A) molecules and show that these scaling laws change significantly when environment-induced dephasing is included. In some cases, D-B-A systems are expected to show no enhancement in the rate of charge transfer with the addition of multiple degenerate pathways. The origins of these different scaling laws are investigated by looking at which Liouville space pathways are active in different dephasing regimes.

Alternate JournalJ Am Chem Soc