title: Cyanine-based J-aggregates as a chirality-sensing supramolecular system.
abstract: J-aggregates are formed for 3,3'-disulfopropyl-5,5'-dichlorothiacyanine (Tc) and 3,3'-disulfobutyl-5,5'-diphenyl-9-ethyloxacarbocyanine (Oc) in aqueous solution in the presence of NaCl, Mg(NO(3))(2), d/l-tartaric acids, asparagine, proline, DNA, and proteins, such as lysozyme, trypsin, RNase, and gelatin. J-aggregates, which are formed in the presence of chiral additives, are optically active and characterized by sigmoidal kinetics with half-times of 10-1000 s, resonance fluorescence, and large CD amplitudes being up to 2° for Tc. Generally, the induced CD signals of the J-aggregates of both dyes are bisignate and the sign corresponds to that of the additive. The transfer of chirality information occurs in the course of the J-aggregation.
authors.affiliation: Center of Photochemistry, Russian Academy of Sciences, 119421 Moscow, Russia.
authors.forename: Tatyana D
authors.initials: TD
authors.lastname: Slavnova
authors.forename: Helmut
authors.initials: H
authors.lastname: Görner
authors.forename: Alexander K
authors.initials: AK
authors.lastname: Chibisov
mesh_terms: D002232:Carbocyanines / Q000737:chemistry*; D002942:Circular Dichroism; D012965:Sodium Chloride / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013237:Stereoisomerism
chemical_list: C559440:3,3'-disulfobutyl-5,5'-diphenyl-9-ethyloxacarbocyanine; C559441:3,3'-disulfopropyl-5,5'-dichlorothiacyanine; D002232:Carbocyanines; D012965:Sodium Chloride