ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

On the Dependence of Spectra of NIR Polymethine Dyes on the Central Chromophore Ring

M. Breza, P. Šimon, and M. Landl

Department of Physical Chemistry, Faculty of Chemical Technology, Slovak University of Technology, SK-812 37 Bratislava

E-mail: simon@cvt. stuba.sk

Abstract: The trends in spectral data of two series of dyes containing either two benzothiazole or four dimethylaminophenyl side chromophores connected by a 7-membered aliphatic: chain in the central chromophore implemented by cyclohexene, furanone or cyclopentene ring are compared. In both series, the effect of the central chromophore ring variation on the maximum wavelength λ_max is studied using the statistical treatment of the chromophores data obtained by quantum-chemical calculations. The significance of the factors influencing λ_max is arranged in the order: the chromophore planarity; mutual angles of individual chromophore planes; the similarity of individual chromophores in the dye; substituents on individual chromophores.

Full paper in Portable Document Format: 552a86.pdf

Chemical Papers 55 (2) 86–90 (2001)