Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Polarized Absorption Spectra of Single Crystals of Ion Radical Salts. I. Molecular Compounds of 7,7,8,8-Tetracyano-p-quinodimethane with N,N,N′,N′-Tetramethyl-p-phenylenediamine and N,N-Dimethyl-p-phenylenediamine
Haruo KurodaShoji HiromaHideo Akamatu
Author information
JOURNALS FREE ACCESS

1968 Volume 41 Issue 12 Pages 2855-2858

Details
Abstract

Polarized absorption spectra in the 10–40 kK region were observed on single crystals of the molecular compounds of tetracyano-p-quinodimethane(TCNQ) with tetramethyl-p-phenylenediamine (TMPD) and with dimethyl-p-phenylenediamine (DMPD). These molecular compounds possess an ionic structure in the ground state. A strong, broad absorption band appears in the near-infrared region of the crystal spectra with a polarization parallel to the crystal axis along which the component ions are alternately stacked making their molecular planes parallel to each other. The absorption maximum of this band is located at 7.7 kK in TMPD·TCNQ and at 8.5 kK in DMPD·TCNQ. These bands are assigned as a one associated with the charge transfer from TCNQ ion to the positive ion of the donor. Other absorption bands found in the spectra can be assigned as local excitation bands associated with the intramolecular transitions of the component ions. However, they are found to be considerably broadened and appreciably shifted to higher energy as compared with the solution spectrum of each component ion.

Information related to the author

This article cannot obtain the latest cited-by information.

© The Chemical Society of Japan
Previous article Next article
feedback
Top