Nonlinear optical properties of azo-azulenes derivatives

In this work are reported some new azo- functionalized azulene derivatives of nonlinear optical properties (NLO). They were studied using standard methods like degenerate four wave mixing, second - and third harmonic generation and nonlinear optical absorption. The obtained results let to conclude that NLO properties of azulene molecule can be significantly enhanced by substitution with electron accepting thiazole group.