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Synthesis and Nonlinear Optical Properties of Novel N,N-Dihydroxyethyl Based Molecular Organic Glasses Using Triaryl Substitutes as Amorphous Phase Formation Enhancers

By Kaspars Traskovskis, Igors Mihailovs, Andrejs Tokmakovs, Valdis Kokars, Valdis Kampars and Mārtiņš Rutkis


Organic materials exhibiting nonlinear optical (NLO) properties are increasing object of interest as an active media in designing of novel optoelectronic devices. Such material together with high NLO activity should meet several other standards. Among them is formation of stable amorphous phase, good optical quality, thermal and chemical resistance. Different material design architectures regarding placement of a NLO active chromophore have been applied to meet those standards: covalent boding to polymer main chain, guest-host systems, dendrimeric compounds and amorphous small-molecular organic glasses. Compared to other approaches small-molecular compounds have several advantages as relatively easy synthesis, well-defined structure, higher purity and increased concentration of active chromophore. Nevertheless, by contrast these compounds have been less explored. To create NLO active material chromophores containing N,N-dihydroxyethyl building block are widely used as polymer precursors. We present series of novel small-molecular materials based on the same building block, with further introduction of triphenylmethyl and triphenylsilyl groups. Presence of these bulky and non-polar substitutes ensures amorphous phase formation of given molecular organic glasses. As NLO chromophores, series of well-known azobenzenes with different electron accepting groups and benzylidene 1,3-indandione derivatives, were used. Results of quantum chemical calculations, synthesis, chemical characterization and experimentally obtained linear and nonlinear optical properties of materials will be presented

Topics: NLO, azochromophore, molecular glasses
Publisher: SPIE
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