THE NEAR-INFRARED SPECTRUM OF THE TCNQ ION-RADICAL IN AQUEOUS SOLUTION.

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1967

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Ohio State University

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Abstract

Boyd and $Phillips^{1}$ recently reported on the curious behavior of the 7,7,8,8-tetracyanoquino-dimethan (TCNQ) ion-radical to dimerize in aqueous solution and gave concise spectroscopic evidence for a bona fide thermodynamic equilibrium, $2 TCNQ^{+} (aq)\rightleftarrows TCNQ^{-}_{2} (aq).$ We would like to report further spectroscopic evidence in the near-infrared spectral range that 1) agrees with the previous thermodynamic data and 2) uncovers an additional solution dimer band that is broad and has an absorption maximum at approximately $920 m \mu$. By comparison with the polarized spectra of the K TCNQ crystalline solid, the $920 m \mu$ solution band is thought to be of charge-transfer origin

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Present address of George R. Anderson: Central Research Dept., E. I. du Pont de Nemours and Co., Wilmington, Delaware 19898 Present address of Ronald Holz: Albert Einstein Medical College, Yeshiva University, New York, N. Y. $^{1}$ R. H. Boyd and W. D. Phillips, J. Chem. Phys., 43, 2927 (1965).
Author Institution: Swarthmore College

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