Patent ID: 7358403

Claim:
An optically active compound having an unsaturated bond at an optically active binding site, wherein the unsaturated bond and a fluorescent substituent or a substituent capable of imparting fluorescence are united in a conjugated manner, wherein the compound is represented by the formula (I): wherein R 1 is an aromatic ethynyl group; R 2 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; each of R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 is independently a hydrogen atom, or an alkyl group having 1 to 30 carbon atoms, a cyclic alkyl group having 3 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms, each of which may have a substituent, with proviso that each of R 4 and R 5 , and R 8 and R 9 may be bonded to form an alkylene group having 2 to 60 carbon atoms; and each of R 11 and R 12 is independently a hydrogen atom or an alkyl group having 1 to 15 carbon atoms which may have a hetero-atom, with proviso that R 11 and R 12 may be bonded to form an alkylene group having 2 to 30 carbon atoms which may have a hetero-atom.