Tetrahedron

New indigo chromophores containing disulfide donor groups

…, L Fitjer, P Müller, I Usón, K Kowski, P Rademacher

Index: Gerke, Ralf; Fitjer, Lutz; Mueller, Peter; Uson, Isabel; Kowski, Klaus; Rademacher, Paul Tetrahedron, 1999 , vol. 55, # 50 p. 14429 - 14434

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Citation Number: 8

Abstract

Oxidative dimerization of a mixture of the thiolanone 5 and the dithiolanone 4 yields 2c as chromophore of thioindigo 1c, and 6 and 7 as chromophores of still unknown indigo dyes. As compared to 2c, the first ionization potential of the new indigo chromophore 7 is higher, but the calculated HOMO-LUMO splitting is lower. Accordingly, its longest wavelength absorption maximum surpasses that of 2c distinctly.