Bithiophene chromophores were synthesized and used to derivatize NH2 and OH groups in aminocyclohexane, (IR, 2R)diaminocyclohexane, (lR, 2R)-trans-l,2-cyclohexanediol and methyl Lacosamidine for their application in the exciton chirality method.Schiff base, ester and amide derivatives were generated in good yields and were found to exhibit exciton-split CD curves.Besides their absorption at long wavelengths (red-shifted) in the visible range, the bithiophene derivatives showed fluorescence and solvatochromic properties.
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Nakanishi et al. (1997) studied this question.