Balakrishna Kolli, Sarada P. Mishra, Akshaya K. Palai, Tapan Kanai, M. P. Joshi, S. Raj Mohan, T. S. Dhami, L. M. Kukreja and A. B. Samui Synthesis and characterization of Y-type polymers for second-order nonlinear optical applications Journal of Polymer Science Part A: Polymer Chemistry 51
A series of Y-type polymers containing different aromatic rings as donors and a dicyanomethylene group as acceptor are synthesized by Knoevenagel condensation. The polymers have reasonably high Tg up to 212 °C. The atomic force microscopic spectra have given clear presentation of noncentrosymmetrical arrangement after poling. The second-harmonic generation intensity was found to remain stable up to about 165 °C.
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