conventional counterepart, which relies upon condensation of a quaternized benzodipyrrolenine with Fisher's aldehyde, for the synthesis of a symmetrically substituted dyes that contain various heterocyclic end-groups. Investigations of the spectral and luminescent properties of the dyes in solution revealed that the absorption (596–717 nm) and emission (629–773 nm) maxima of the biscyanines were red-shifted
一种新的长波吸收和发射双
三甲胺染料的合成新方法是将苯并二
吡咯啉二醛与季
铵化的杂环CH-酸性化合物缩合,以制备一系列双花菁。该新方法比常规对等方法更方便,该常规对等方法是将季
铵化的苯并二
吡咯啉与费舍尔醛缩合,以合成包含各种杂环端基的对称取代的
染料。对
染料在溶液中的光谱和发光特性的研究表明,与母体“单体”
花青相比,双
花青素的最大吸收(596–717 nm)和最大发射(629–773 nm)红移了约100 nm。仅包含一种发色的聚次甲基系统。-1 cm -1)和量子产率(≤28%)。两个末端
苯并恶唑部分均被
吲哚啉,
苯并噻唑,2-和4-
喹啉取代,使吸收和发射最大值出现红移,但降低了量子产率。