Azo-hydrazo tautomerism and inclusion complexation of 1-phenylazo-2-naphthols with various solvents and beta-cyclodextrin.

Spectral characteristics of sudan I (SDI), sudan II (SDII) and mordant violet-5 (MV5) have been studied in various solvents and beta-cyclodextrin (beta-CD). The inclusion complex of the above molecules with beta-CD was analyzed by UV-visible, fluorometry, and DFT methods. The solvent study shows that azo-hydrazo tautomer is present in these molecules. The increase in the fluorescence intensity and a large bathochromic shift in the S(1) state indicate these molecules forms 1:1 inclusion complex with beta-CD.

Citation

A Antony Muthu Prabhu, G Venkatesh, N Rajendiran. Azo-hydrazo tautomerism and inclusion complexation of 1-phenylazo-2-naphthols with various solvents and beta-cyclodextrin. Journal of fluorescence. 2010 Jul;20(4):961-72

PMID: 20352305

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