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Origin of the Redox-Induced Conductance Transition in a Thin Film of Switchable Rotaxanes
Journal article

Origin of the Redox-Induced Conductance Transition in a Thin Film of Switchable Rotaxanes

Matthew Rossi and Karl Sohlberg
Journal of computational and theoretical nanoscience, v 8(9), pp 1895-1899
01 Sep 2011

Abstract

Chemistry Chemistry, Multidisciplinary Materials Science Materials Science, Multidisciplinary Nanoscience & Nanotechnology Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Science & Technology - Other Topics Technology
We report a computational analysis of a switchable [2]rotaxane, thin films of which have previously been reported to exhibit dramatically different charge mobility, depending on which of the two stable co-conformations the complexes are in. We first determine the binding preferences for the cyclophane ring (CBPQT(4+)) at each of the two binding sites on the shaft (tetrathiafulvene-TTF or naphthalene-naph). We then determine the reorganization energies upon oxidation associated with each co-conformation. The results are interpreted based on an implementation of Marcus theory, popularized by Deng and Goddard, which has high dependence on reorganization energy. The findings explain published experiments, which found dramatically higher charge mobility when the cyclophane ring of the rotaxane is bound to the naph site than when it is bound to the TTF site.

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Web of Science research areas
Chemistry, Multidisciplinary
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Physics, Applied
Physics, Condensed Matter
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