A tricyanofuran (TCF) acceptor-based nonlinear optical (NLO) chromophore (2-(3-cyano-4-(4-((2-hydroxyethyl)(methyl)amino)styryl)-5,5-dimethylfuran-2(5H)-ylidene)malononitrile,abbr. FS) was synthesized and then reacted with 3-isocyarmatopropyl triethoxysilane (ICTES) to form a functionalized silicon alkoxide precursor (named ICTES-FS).Sol solutions were obtained after co-hydrolysis/condensation of ICTES-FS,tetraethoxysilane (TEOS) and 3-(Trimethoxysilyl)propyl methacrylate (TSPM).Transparent films were only fabricated with the sol containing high concentration of TSPM.Higher concentration of TSPM was found useful to abate dipolar chromophore interactions and consequent aggregation problems.Second- order NLO properties and temporal stability of sol-gel films were also investigated by virtue of in situ second harmonic generation (SHG).
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