Nonlinear Optical Thin Film Device from a Chiral Octopolar Phenylacetylene Liquid Crystal
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- 作者：Laura de Vega ; Stijn van Cleuvenbergen ; Griet Depotter ; Eva M. Garc铆a-Frutos ; Berta G贸mez-Lor ; Ana Omenat ; Rosa M. Tejedor ; Jos茅 Luis Serrano ; Gunther Hennrich ; Koen Clays
- 刊名：The Journal of Organic Chemistry
- 出版年：2012
- 出版时间：December 7, 2012
- 年：2012
- 卷：77
- 期：23
- 页码：10891-10896
- 全文大小：314K
- 年卷期：v.77,no.23(December 7, 2012)
- ISSN：1520-6904
文摘
A set of chiral discotic phenylacetylenes have been synthesized by 3-fold Sonogashira coupling between different ethynylbenzenes and triiodobenzenes. The resultant bulk materials are fully characterized by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction. The octopolar nature of the target compounds is studied by UV鈥搗is absorption spectroscopy and hyper-Raleigh scattering in solution. Optimization of the donor鈥揳cceptor substitution yields both high hyperpolarizability values and appreciable mesomorphic properties. A simple thin film device for second harmonic generation has been prepared from the nitro-substituted liquid crystalline derivative.