Issue 19, 1999

Dependence of intervalence-transfer bands for mixed-valence oligo(1,1′-dihexylferrocenylene)s on the oxidation number and the number of ferrocene units from two to six

Abstract

Intervalence-transfer (IT) bands at all of the mixed-valence states of oligo(1,1′-dihexylferrocenylene)s from the dimer to the hexamer, 2–6, were determined by analysis of the absorption spectra of the oligomers oxidized quantitatively with 1,1′-dichloroferrocenium hexafluorophosphate, 1, in CH2Cl2–acetone. Characteristic features of the IT bands are a higher energy shift in νmax as the oxidation number for each oligomer increases and a lower energy shift in νmax for the monocationic forms of the oligomers as the number of ferrocene units increases. A simple analysis of the shift in νmax of IT bands was made based on a model assuming that the mixed-valence states are a linear combination of reduced (Red) and oxidized (Ox) nuclei. It is qualitatively rationalized by taking into account the change in neighboring-site combination, especially between Red–Ox and Ox–Ox, formed by photoelectron transfer, which requires extra energy due to the strain in internuclear distance.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1999, 3355-3360

Dependence of intervalence-transfer bands for mixed-valence oligo(1,1′-dihexylferrocenylene)s on the oxidation number and the number of ferrocene units from two to six

T. Horikoshi, K. Kubo and H. Nishihara, J. Chem. Soc., Dalton Trans., 1999, 3355 DOI: 10.1039/A904953C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements