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

Conjugated push-pull salts derived from linear benzobisthiazole: preparation and optical properties

Alexandra Čibová, Peter Magdolen, Andrea Fülöpová, and Pavol Zahradník

Faculty of Natural Sciences, Comenius University, Mlynská dolina, 842 15 Bratislava, Slovakia

E-mail: magdolen@fns.uniba.sk

Abstract: A series of novel monomethylated salts derived from linear benzobisthiazole was prepared. The push-pull attributes of these new compounds are represented by a quaternised azolium cycle as the acceptor part at one end of the structure and the dialkylamino- or diarylamino-substituted benzene ring as the donor part at the opposite end. Both moieties are connected by a conjugated linker consisting of one or two double bonds. Such dipolar structures are promising candidates for non-linear optical materials. The quantum-chemical indices describing linear and non-linear optical properties were obtained from semi-empirical calculations. The relationships between the chemical structure and non-linear optical properties of the cations studied were obtained. Effective conjugation was confirmed by measuring the optical properties in the UV-VIS region.

Keywords: heterocycles – thiazolium salts – conjugation – non-linear optics – condensation

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-012-0251-2

Chemical Papers 67 (1) 110–116 (2013)