Synthesis of a Styrylthiophene Monomer and Corresponding Polyurethane and Their Optical Nonlinearity

Abstract

Abstract: Anovel trans-7-[4-N,N-di-(β-hydroxy ethylamino-benzene)]-ethenyl-ethenyl-3,5-dinitrothiophene(HBDT) monomer and corresponding prepolymer, polyurethane with the monomer covalently incorporated were synthesized and characterized. The reaction temperature affecting monomers formation were discussed. Since thiophene has a lower delocalization energy than that of benzene, it can offer more effective conjugation and higher nonlinearity than that of benzene in donoracceptor organic compounds, and forms objective molecules with reasonable optical, thermal stability. The monomer and polyurethane exhibited a good solubility in common organic solvents and thermal stability. The high optical quality films of the polyurethane were fabricated and coronapoled. The UVVis absorption peaks (530 nm) of the monomer in methanol and the without poling polyurethane films didnt change basically. The second, thirdorder nonlinear optical susceptibility, (3), of HBDT was measured by solvatochromic method and DFWMmethod, respectively, they were 8.443×10^-45esu,1.016×10^-12esu(c=3.96×10^-3mol/L),3.93×10^-32esu. respec-tively.

Key words: Thiophene, Prepolymer, Polyurethane, Nonlinear optical susceptibility

CLC Number:

O626

TrendMD:

WANG Jiang-Hong, ZHOU Jia-Yun, ZHANG Xin-Xin, ZHAI Jian-Feng, LI Zhao, SHEN Yu-Quan, XU Gang . Synthesis of a Styrylthiophene Monomer and Corresponding Polyurethane and Their Optical Nonlinearity[J]. Chem. J. Chinese Universities, 1999, 20(2): 237.

References

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