Synthesis and Absorption Spectra of Triarylmethane Dyes Containing a Heterocyclic Ring (II)

概要

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Some triarylmethane dyes containing a heterocyclic ring were prepared to examine the effect of a heterocyclic ring on the absorption spectra of triphenylmethane dyes. Comparison of Malachite Green and triarylmethane dyes containing a heterocyclic ring shows that replacement of a phenyl group in Malachite Green with a heterocyclic ring as a benzopyran or a pyridine causes a bathochromic shift of λmax. The Resonance Raman technique was applied to the triarylmethane dye containing a pyridine ring, and typical "x-band" and "y-band" of the triphenylmethane dye in the absorption spectra were assigned. The PPP-MO calculation shows that the longest-wavelength of the triarylmethane dye containing a 1, 4-naphthoquinone or anthraquinone is shifted to the near-infrared region. It was found that the quantum yield for decomposition of triarylmethane containing a benzothiopyran ring by irradiation of the UV light was larger than that of triphenylmethane in ethanol, but oppositely in chloroform it was smaller. The steric effect of the methyl substituted triphenylmethane was interpreted by the MM 2 calculations
Japan Society of Colour Materialの論文