Abstract
Abstract The absorption spectra of 7,7,8,8-tetracyanoquinodimethane (TCNQ) solubilized in surfactant solutions were found to be influenced by day light (hereafter referred to as light). The formation of the monomer band of TCNQ, anion radical in the aqueous solution of DPCl (dodecylpyridinium chloride), DPBr (dodecylpyridinium bromide) and C12E8 (homogeneous octaethylene glycol dodecylether) were enhanced by light. On the other hand, the spectra of TCNQ solubilized in surfactant micelle in the dark suggested that TCNQ exists as dimer anion radical form (TCNQ)2\ewdot. Thus, in solubilized state of TCNQ in micelle there is an equilibrium between monomer TCNQ\ewdot and dimer (TCNQ)2\ewdot, which seems to be easily influenced by light and surfactant. Appearance of a monomer radical band was remarkable in DPCl, DPBr, and C12E8 but only the dimer band was found in SDS even in the light.
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