2,4,6-三(对甲基苯乙烯基)均三嗪的合成、结构及其光学性质

Synthesis, Structure and Optical Properties of 2,4,6-tris(p-methylstyryl)-s-triazine

合成了八极分子 2 ,4,6 三 (对甲基苯乙烯基 )均三嗪 [即 2 ,4,6 tris(p methylstyryl) s triazine ,缩写为TMSTA] ,用四圆X衍射法测得该晶体属于正交晶系的Pmn2 1空间群 ,晶体结构非中心对称 ,分子构型为微弯曲的平面三角形 ,具有近似的D3h对称性 .该化合物在氯仿中最长波长吸收峰位于 3 3 7nm ,在极性较强的溶剂乙腈中的荧光发射峰位于 43 5nm .在 10 64nm皮秒脉冲基频光下 ,测得其粉末的倍频光强度为尿素的 9 1倍 .另外 ,TMSTA良好的热稳定性 (熔点为 2 3 5～ 2 3 7℃ )增加了其作为 10 64nmNd :YAG激光的倍频材料的应用价值 .

A new octupolar compound, 2,4,6-tris(p-methylstyryl)-s-triazine (TMSTA, C 30H 27N 3), was synthesized. It has a molecular configuration of slightly curved planar triangle and crystallizes into the orthorhombic space group Pmn2 1. The crystal is SHG active with the powder SHG efficiency of 9.1 times as large as that of urea under 1064 nm input laser pulses. The maximum absorption peak (λ max) in chloroform (1×10 -5 mol·L -1) is at 337 nm and there is no absorption above 400 nm. The peak position in its fluorescence emission in acetonitrile is at 435 nm. It also has good thermal stability (the melting point of 235～237 ℃) .