Journal article

Structural and optical investigations of charge transfer complexes involving the radical anions of TCNQ and F(4)TCNQ

Ashley L Sutton, Brendan F Abrahams, Deanna M D'Alessandro, Timothy A Hudson, Richard Robson, Pavel M Usov

CrystEngComm | ROYAL SOC CHEMISTRY | Published : 2016

Abstract

The structures and optical band gaps of twelve radical anionic 7,7,8,8-tetracyanoquinodimethane (TCNQ) and 7,7,8,8-tetracyano-2,3,4,5-tetrafluoroquinodimethane (F TCNQ) based charge-transfer complexes are reported. The compounds described have been categorised into three general types based upon solid-state arrangements of the donor and acceptor molecules. Crystallographic, EPR and IR spectroscopic investigations indicated that both TCNQ and F TCNQ in each of the compounds described exist in the radical monoanion form. Visible-NIR absorption measurements indicate optical band gaps in the range of 0.79 to 1.08 eV. Whilst the packing arrangements in CT complexes are known to affect the band ga..

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University of Melbourne Researchers

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Funding Acknowledgements

We gratefully acknowledge the financial support of the Australian Research Council. Part of the research reported was undertaken at the powder diffraction beamline at the Australian Synchrotron, Victoria, Australia.