Cocrystalline Polymer Films Exhibiting Second-Order Nonlinear Optical Properties
Tailored polymer materials exhibiting high-glass transition temperatures, cross-linked matrices, and/or strong intermolecular interactions containing electric-field poled nonlinear optical (NLO) chromophores are promising materials for applications in optical telecommunication, highperformance computing, and data transmission. Although the current design parameters have led to significant advances in NLO materials, we introduce an alternative, yet highly effective, approach in which a NLO chromophore is cocrystallized with a polymer, forming a noncentrosymmetric hybrid host−guest complex. Specifically, poly(ethylene oxide) (PEO) and 2-chloro-4-nitroaniline (CNA) will cocrystallize and exhibit second harmonic generation (SHG) activity due to the formation of a noncentrosymmetric cocrystalline unit cell where the chromophore exhibits acentric alignment. Furthermore, the hybrid PEO/CNA films exhibit interesting SHG activity at elevated temperature in which SHG intensity decreases to zero when the cocrystal orientation randomizes due to sample melting. Aligning and maintaining a cocrystalline domain orientation via the formation of hybrid host−guest complexes, while imparting SHG properties, is an innovative approach for creating materials exhibiting SHG properties.
|Work Title||Cocrystalline Polymer Films Exhibiting Second-Order Nonlinear Optical Properties|
|License||In Copyright (Rights Reserved)|
|Publication Date||September 21, 2021|
|Publisher Identifier (DOI)||
|Deposited||July 28, 2022|
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