Article ID Journal Published Year Pages File Type
1650728 Materials Letters 2008 4 Pages PDF
Abstract

This letter reports a new class of nonlinear optical (NLO) chromophores, of which 2-dicyanomethylen-3-cyano-4-{2-[2-(4-(N,N-di(2-hydroxyethyl)-amino)phenylazo)-thien-5]-E-vinyl}-5,5-dimethyl-2,5-dihydrofuran (2a) is the prototype with high thermal stability and large optical nonlinearity. Chromophore 2a was synthesized based on the azothiophene conjugated spacer and TCF electron-withdrawing acceptor, and characterized by IR, UV–Vis, MS and NMR spectra. A high decomposition temperature of 244 °C was determined by TGA measurement, and a first hyperpolarizability (zero-frequency hyperpolarizability, β0) as large as 800 × 10− 30 esu was estimated by HRS technology.

Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
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