Head-to-tail assemblies of dipolar, piperazine-linked chromophores: synthesis, x-ray structure, and dielectric characterization
作者:H. E. Katz、M. L. Schilling
DOI:10.1021/ja00201a042
日期:1989.9
condensation of substituted cyanoacetylpiperazines with p-aminobenzaldehydes or by carbonyldiimidazole-promoted coupling of phenylpiperazines with p-aminocyanocinnamic acids. The resulting oligomeric amidopiperazines possess significantly additive molecular moments when in extended conformations and therefore are potentially valuable for the fabrication of polymer films containing electric field oriented
通过取代的氰基乙酰基哌嗪与对氨基苯甲醛的 Knoevenagel 缩合或通过羰基二咪唑促进的苯基哌嗪与对氨基氰基肉桂酸的偶联,制备了受体取代的苯胺的二聚体和低聚物的混合物。所得的低聚酰氨基哌嗪在处于扩展构象时具有显着的附加分子矩,因此对于制造含有电场取向发色团的聚合物薄膜具有潜在价值,例如二阶非线性光学所需的。二聚体是构象定义的,模型化合物的 X 射线结构分析证实了酰胺键的立体化学和键角。