3,6-Disubstituted carbazole chromophores containing thiazole and benzothiazole units: Synthesis, characterization and first-order hyperpolarizabilities

3,6-Disubstituted carbazole chromophores containing thiazole and benzothiazole units were synthesized and characterized by NMR, IR, and UV. The first-order hyperpolarizabilities (β) were calculated via solvatochromic method. Our experiments suggest that the incorporation of thiazole and benzothiazole into carbazole-based chromophores can allow for significant enhancement of molecular hyperpolarizabilities. Nonlinear optical properties of AπDπA carbazole chromophores are superior to those of the corresponding DπA aryl compounds.