摘要
By covalently binding chromophore NPP, N-(4-nitrophenyl)-(L)-prolinol, to a structurally controlled cage-like cross-linking polymer (SCCP), a modified nonlinear optical (NLO) polymeric film prepared by 'in situ poling and sol-gel' process successfully overcame the fundamental problem of NPP chromophores subliming out from the cages of the 'doped'' NLO polymeric film when heated or placed under UV light. Its d(33) (coefficient of second harmonic generation) is 2.0 X 10(-8) esu. measured by IR dichroism. The modified film has a low decay of the SHG signal and preserves 94% of the initial value after 50 days at room temperature These properties match that of the 'doped' film, indicating that the modified film also retains the main advantages of the 'doped' film.
By covalently binding chromophore NPP, N-(4-nitrophenyl)-(L)-prolinol, to a structurally controlled cage-like cross-linking polymer (SCCP), a modified nonlinear optical (NLO) polymeric film prepared by 'in situ poling and sol-gel' process successfully overcame the fundamental problem of NPP chromophores subliming out from the cages of the 'doped'' NLO polymeric film when heated or placed under UV light. Its d(33) (coefficient of second harmonic generation) is 2.0 X 10(-8) esu. measured by IR dichroism. The modified film has a low decay of the SHG signal and preserves 94% of the initial value after 50 days at room temperature These properties match that of the 'doped' film, indicating that the modified film also retains the main advantages of the 'doped' film.
基金
The project was supported by the National Natural Science Foundation of China (No. 59483001).
