1. A nunchaku-like nonlinear optical chromophore for improved temporal stability of guest–host electro-optic materials.
- Author
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Huang, Heyan, Deng, Guowei, Liu, Jialei, Wu, Jieyun, Si, Peng, Xu, Huajun, Bo, Shuhui, Qiu, Ling, Zhen, Zhen, and Liu, Xinhou
- Subjects
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NONLINEAR optics , *CHROMOPHORES , *CHEMICAL stability , *ELECTRO-optical effects , *BIPHENYLENE , *CHEMICAL structure , *CHARGE-charge interactions - Abstract
Abstract: A novel nunchaku-like organic second order nonlinear optical chromophore containing a D–π–A backbone and a rigid biphenylene unit was prepared. The UV–vis absorption spectra studies demonstrated that the large rigid structure could suppress dipole–dipole interactions effectively. The electro-optic coefficient of a poled film containing 20% wt of the new dye doped in amorphous polycarbonate afforded a value of 39 pm/V at 1310 nm. Compared with results obtained from a similar D–π–A chromophore without the rigid isolated group, the new dye gave better performance. Moreover, the electro-optic film prepared with the new dye gave greater temporal stability, compared to a similar D–π–A doped poled film that was reported previously. These results indicated that the introduction of a biphenylene group could effectively reduce the intermolecular electrostatic interactions and aid the alignment of the chromophores. [Copyright &y& Elsevier]
- Published
- 2013
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