Color Change of (<i>E</i>)-2,3-Bis(2,3,4,5,6-Pentafluorophenyl)-3-[2,3,5,6-tetrafluoro-4-(cyanomethyl)phenyl]acrylonitrile by the Addition of Amines
作者:Yasuhide Nakayama、Kazuo Inukai、Koichiro Hayashi、Masahiro Irie
DOI:10.1246/bcsj.64.1226
日期:1991.4
(E)-2,3-Bis(2,3,4,5,6-pentafluorophenyl)-3-[2,3,5,6-tetrafluoro-4-(cyanomethyl)phenyl]acrylonitrile(3E) was synthesized. A benzene solution of 3E turns into a brilliant red color by the addition of aliphatic amines. The coloration mechanism is studied by optical absorption, conductivity and product analyses. It has become apparent that ion-pair formations between 3E and the amines by proton transfer reactions are responsible for the coloration. Structural requirements of the amines for the ion-pair formation are discussed.
(合成了 (E)-2,3-双(2,3,4,5,6-五氟苯基)-3-[2,3,5,6-四氟-4-(氰甲基)苯基]丙烯腈(3E)。通过添加脂肪族胺,3E 的苯溶液变成了鲜艳的红色。通过光学吸收、电导率和产物分析研究了着色机理。显而易见,3E 和胺之间通过质子转移反应形成的离子对是着色的原因。讨论了离子对形成对胺的结构要求。