对称型席夫碱类二茂铁衍生物的合成与性能研究

Synthesis and Study of Symmetrical Schiff Base-Ferrocene Derivative

以二茂铁甲醇为原料,经Wittig反应后与2,6-(双胺基)-苯并[1,2-d-4,5-d′]双三唑-4,8(2H,6H)-二酮缩合,合成了一个D-π-A-π-D结构的二茂铁席夫碱类金属有机三阶非线性光学材料。化合物结构经1H NMR,MS表征确认。测定了该化合物的紫外-可见吸收光谱,用简并四波混频(DFWM)检测了其三阶非线性参数,检测波长为800 nm;脉冲宽度为80 fs。该化合物的三阶非线性极化率χ(3)值为3.67×10-13esu(静电单位),分子二阶超极化率γ值为3.49×10-31esu,表明该化合物具有良好的三阶非线性光学性能,优于现有的二茂铁类金属有机材料。探讨了分子结构对三阶非线性光学性能的影响,长共轭链、强电子离域能可提高分子三阶非线性光学性能。

A new dondr-π-acceptor-π-donor Schiff base-ferrocene derivative is synthesized and characterized by 1H NMR and MS.The UV-vis absorption spectra of the materials are determined and the third-order optical nonlinearity is measured by optical path of degenerate four-wave mixing（DFWM） at wavelength of 800 nm and response time of 80 fs.The third-order nonlinear optical susceptibilities χ（3） of this compound is 3.67×10-13 esu and the second order hyperpolarizabilities γ of this molecule is 3.49×10-31 esu.The influence of molecular structure on the third-order optical nonlinearity is studied and the long conjugate chain,formation of accepor-donor structure can improve the third-order optical nonlinearity.