Reversal aggregation-induced circular dichroism from axial chirality transfer via self-assembled helical nanowires

Reversal aggregation-induced circular dichroism from axial chirality transfer via self-assembled helical nanowires
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通过自组装螺旋纳米线的轴向手性转移产生反转聚集诱导的圆二色性

DOI:
10.1039/c7ra00703e
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发表时间:
2017-03
期刊:
影响因子:
3.9
通讯作者:
Yixiang Chen
Yixiang Chen
中科院分区:
化学3区
文献类型:
--
作者:
F;ian Meng;Yuan Sheng;Fei Li;Chengjian Zhu;Yiwu Quan;Yixiang Chen

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通过Sonogashira交叉偶联反应,设计并合成了两个手性联萘基对映体(R/S)-7。有趣的是,所得的(R/S)-7在DCM/己烷混合物中由于AIE行为而表现出发射放大响应,但在THF/H2O混合物中由于ACQ效应而表现出荧光猝灭。(R/S)-7可以产生从溶液到聚集体的逐渐反转的AICD(aggregation-induced circular dichroism)信号,这可以归因于轴向手性转移到聚集态的自组装螺旋纳米线。
Two chiral binaphthyl-based enantiomers, (R/S)-7, were designed and synthesized by Sonogashira cross-coupling reaction of AIE-active TPE and O-BOPHY. Interestingly, the resulting (R/S)-7 can exhibit emission enlargement response in DCM/hexane mixtures due to AIE behavior, but fluorescence quenching in THF/H2O mixtures due to ACQ effect. (R/S)-7 can produce gradual reversal AICD (aggregation-induced circular dichroism) signals from solution to aggregation, which can be attributed to axial chirality transfer to self-assembled helical nanowires in aggregation state.
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