类杯芳烃孔穴桥联双官能团分子开关化合物
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- 英文论文题名：Structures of Bridged Di-py-cavitand Compounds as Molecular Switch
- 论文作者：徐海 ; 赵斯祺 ; 任扬 ; 汪翔 ; 林雨霖
- 英文论文作者：Hai Xu ; Siqi Zhao ; Yang Ren ; Xiang Wang ; Yulin Lin ; College of Chemistry and Chemical Engineering ; Central South University
- 年：2016
- 作者机构：中南大学化学化工学院;
- 论文关键词：分子开关 ; 类杯芳烃孔穴化合物 ; 荧光 ; 双芘Cavitand化合物
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十一分会：π-共轭材料
- 语种：中文
- 分类号：O621.12
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：111k
- 原文格式：O
- 会议级别：全国
摘要
利用构型可变的分子开关类杯芳烃孔穴化合物(Cavitand)作为母体,可制备一系列带双官能团的分子开关化合物,这里以双芘Cavitand化合物为例进行说明:在室温及中性状态下,两种不同长度桥联双芘Cavitand化合物均可检验出分子内激基复合物荧光,其中短臂桥联双芘Cavitand化合物荧光明显强于长臂Cavitand化合物。两种双芘化合物的分子内激基复合物荧光经三氟乙酸酸化后消失;而继续使用碱中和至中性,则荧光恢复。而这一荧光出现—消失—出现的过程,有力的验证了Cavitand母体化合物分子构型闭合—打开—闭合可有效调控分子激基复合物荧光开关过程。此外,通过高斯计算模拟了两种不同臂长的双芘Cavitand化合物的理论分子构型,发现长臂双芘化合物在Cavitand母体构型处于闭合状态时两个芘基团重叠部分较少是相应的分子内激基复合物荧光较小的关键原因。
Two kinds of di-py-cavitand compounds with different arm length were synthesized by using molecular switch which configurations are variable-class calixarene cavities Cavitand as the parent compounds.In the neutral state of room temperature,the two kinds of di-py-cavitand compounds can detect intramolecular exciplex fluorescence and short-arm cavitand is obviously more stronger than the long arm one.However,intramolecular exciplex fluorescence disappears after acidification by TEA.and appears again when continuing to add alkali so as to neutralize to neutral state.The process of fluorescence appearing-disappearing-appearing powerfully verified that the process of closing-opening-closing of Cavitand compounds configuration can efficiently control intramolecular exciplex fluorescence's opening and closing processes.In addition,the di-py-cavitand compounds molecular configurations in theory with different arm length were simulated through Gaussian calculation module,finding that two py groups of di-py-cavitand compound with long arm were less overlaped when the Cavitand configuration was in the closing state,which is the key cause of the weak exciplex fluorescence intensity.
Two kinds of di-py-cavitand compounds with different arm length were synthesized by using molecular switch which configurations are variable-class calixarene cavities Cavitand as the parent compounds.In the neutral state of room temperature,the two kinds of di-py-cavitand compounds can detect intramolecular exciplex fluorescence and short-arm cavitand is obviously more stronger than the long arm one.However,intramolecular exciplex fluorescence disappears after acidification by TEA.and appears again when continuing to add alkali so as to neutralize to neutral state.The process of fluorescence appearing-disappearing-appearing powerfully verified that the process of closing-opening-closing of Cavitand compounds configuration can efficiently control intramolecular exciplex fluorescence's opening and closing processes.In addition,the di-py-cavitand compounds molecular configurations in theory with different arm length were simulated through Gaussian calculation module,finding that two py groups of di-py-cavitand compound with long arm were less overlaped when the Cavitand configuration was in the closing state,which is the key cause of the weak exciplex fluorescence intensity.
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