Synthesis and properties of novel Y-shaped NLO molecules containing thiazole and imidazole chromophores

Two new second-order NLO molecules, derived from a five-membered heterocyclic ring (thiazole and imidazole), were synthesized. The thermal stability, optical transparency and second-order nonlinear optical (NLO) properties were investigated. As a result, good nonlinearity-transparency-thermal stability trade-off was achieved.