Changes in the electronic structures of tetrakis(alkylthio)tetrathiafulvalenes (TTCn-TTFs) during the solid–melt transition
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 83 (11) , 2151-2161
- https://doi.org/10.1039/f29878302151
Abstract
The u.v. photoelectron spectra of tetrakis(alkylthio)tetrathiafulvalenes (TTCn-TTFs) in the solid and the molten states have been measured for n= 2 and 10, where n is the number of carbon atoms in each chain. The ionisation threshold and spectral features of TTC10-TTF are different in the solid and molten states, while no change is observed for TTC2-TTF. This result proves that the low-ionisation threshold of TTC10-TTF in the solid state is caused by the much closer packing of TTF moieties than that of TTC2-TTF. The absorption spectra of these compounds have also been measured in the solid, molten and solution states. Comparison of the observed spectra reveals that the electronic structure of TTC2-TTF in the solid state is dominated by that of an isolated molecule, while that of TTC10-TTF in the solid state is strongly affected by the intermolecular interactions. The relationship between these findings on the electronic structures and the reported electric conductivities is also discussed.Keywords
This publication has 0 references indexed in Scilit: