Crystal structures, two-photon absorption and theoretical calculation of a series of bis-vinylpyridine compounds synthesized by one-step solid state reaction
作者:DongMei Li、Qiong Zhang、A. M. Showkot Hossain、Mei Sun、JieYing Wu、JiaXiang Yang、HongPing Zhou、LiMin Tao、ChuanKui Wang、YuPeng Tian
DOI:10.1007/s11426-010-4141-6
日期:2011.5
Three bis-vinylpyridine compounds (4,4′-bis(2-vinylpyridine)biphenyl L 1, 4,4′-bis(3-vinylpyridine) biphenyl L 2, and 4,4′-bis (4-vinylpyridine)biphenyl L 3) were synthesized by one-step solid-state reactions at room temperature, giving nearly quantitative yields. The compounds obtained were fully characterized by IR, MS and NMR spectroscopies. The structures of L 2 and L 3 were determined by single crystal X-ray diffraction analysis. No noticeable solvatochromism was observed in either one-photon absorption or one-photon excited fluorescence spectra. All of the compounds have high fluorescence quantum yields and long fluorescence lifetime. The linear and nonlinear optical properties of the compounds were investigated both experimentally and theoretically. Interestingly, the position of the nitrogen atom from pyridine influences their two-photon absorption across-sections.
三种双乙烯基吡啶化合物(4,4′-双(2-乙烯基吡啶)联苯 L 1、4,4′-双(3-乙烯基吡啶)联苯 L 2和4,4′-双(4-乙烯基吡啶)联苯 L 3)通过一步固态反应在室温下合成,产率接近100%。通过红外光谱、质谱和核磁共振光谱对所得化合物进行了全面表征。通过单晶X射线衍射分析确定了L 2和L 3的结构。在一光子吸收或一光子激发荧光光谱中均未观察到明显的溶剂色变。所有化合物都具有高荧光量子产率和长荧光寿命。通过实验和理论研究了化合物的线性和非线性光学性质。有趣的是,吡啶中氮原子的位置会影响其两光子吸收截面。