Synthesis of new bis(tetrahydropyrrolo[3,4-b]carbazoles) with a functionalized diaryl spacer
作者:Farokh Mehrabani、Ulf Pindur
DOI:10.1039/b006899n
日期:——
Some new bis(tetrahydropyrrolo[3,4-b]carbazoles) were synthesized by Diels–Alder reactions of in-situ generated indole-2,3-quinodimethanes with a variety of bismaleimides as dienophiles and also by reaction of dianilines with a succinic acid anhydride group incorporated into a biscarbazole. In a special reaction a spermine linker was introduced. The new biscarbazoles represent potential DNA ligands
一些新的双(四氢吡咯并[3,4- b ]咔唑)是通过原位生成的吲哚-2,3-喹二甲烷与各种双马来酰亚胺作为亲二烯物的狄尔斯-阿尔德反应,以及二苯胺与琥珀酸的反应合成的。并入双咔唑的酸酐基团。在一个特殊的反应中,引入了精胺接头。新的双咔唑代表了开发新的抗肿瘤活性药物的潜在DNA配体。
Synthesis of Bismaleimides Bearing Electron-Donating Chromophores and Their Fluorescence Behavior during Copolymerization
作者:Xin Zhang、Ying-Hua Jin、Hui-Xiang Diao、Fu-Sheng Du、Zi-Chen Li、Fu-Mian Li
DOI:10.1021/ma0205111
日期:2003.5.1
(symbolized as A(=)−D(*)−A(=)), as well as their saturated modelcompounds were synthesized, and their steady-state and time-resolved fluorescence spectra were investigated. These A(=)−D(*)−A(=) monomers display strong intramolecular fluorescence quenching. Their fluorescence quantum yields and lifetimes are generally lower than those of their modelcompounds. It was found that the electron-poor CC bond of maleimide
带有二苯基甲胺,三苯胺或2,5-二苯基-1,3,4-恶二唑发色团(表示为A (=)-D (*) -A (=))的双马来酰亚胺和双钛亚酰亚胺以及它们的饱和模型化合物为合成,并研究了它们的稳态和时间分辨荧光光谱。这些A (=)- D (*) -A (=)单体显示出强烈的分子内荧光猝灭。它们的荧光量子产率和寿命通常低于其模型化合物的荧光量子产率和寿命。发现马来酰亚胺和衣康酰亚胺单元的电子贫C C C键(A (=))起着分子内淬灭,这是相关的A的电子接受能力的关键作用(=) A之间的几何布置和(=)和给电子性发色团(d (*) )。分子内猝灭归因于分子内电荷转移相互作用,这通过分子间荧光猝灭和时间分辨荧光研究得到证实。在分子内猝灭的基础上,可以开发一种新的荧光方法来监测双马来酰亚胺的聚合和固化过程,该过程可以直接反映出碳原子数。聚合和固化过程中的C键消耗量。新的荧光方法不仅可以通过本征荧光技术来利用,而且可以通过外在荧光技术来利用。