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Long range electron transfer across $pi$-conjugated systems: role of electron correlations | | S. Lakshmi
; Ayan Datta
; Swapan K. Pati
; | | Date: |
2 Jul 2005 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Soft Condensed Matter | cond-mat.mes-hall cond-mat.soft | | Abstract: | We consider a prototype polyene chain: donor-$pi$(bridge)-acceptor. The distance between the donor and the acceptor is varied by increasing the number of bridged atoms and rate of electron transfer, k$_{et}$ is studied for a series of different donors, D=NH$_2$, SH, OH, and a fixed acceptor, A=NO$_2$. We observe a large k$_{et}$ even at a very large D-A separation of $sim$ 45 $AA$, unexpected from the well-known and standard theories like the Forster theory. Such a long range electron transfer is due to the strong electron-electron interactions in the bridged orbitals that result in deconfinment of electrons in donor orbitals. Calculations at various levels: semi-empirical and many-body exact, have been performed to accurately account for such correlations. | | Source: | arXiv, cond-mat/0507046 | | Services: | Forum | Review | PDF | Favorites | |
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