Chiroptical property of TPE triangular macrocycle crown ethers from propeller-like chirality induced by chiral acids†,Journal of Materials Chemistry C

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Chiroptical property of TPE triangular macrocycle crown ethers from propeller-like chirality induced by chiral acids†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-05 00:00:00 , DOI: 10.1039/c7tc05759h
Wei-Guo Qiao _{1,

2,

3,

4,

5} , Jia-Bin Xiong _{1,

2,

3,

4,

5} , Ying-Xue Yuan _{1,

2,

3,

4,

5} , Hong-Chao Zhang _{1,

2,

3,

4,

5} , Dong Yang _{6,

7,

8,

9,

10} , Minghua Liu _{6,

7,

8,

9,

10} , Yan-Song Zheng _{1,

2,

3,

4,

5}

Affiliation

Herein, novel tetraphenylethylene (TPE) triangular macrocycles bearing three crown ether rings were synthesized by connecting three TPE crown ether units at the cis-position with three ethynylene bridging linkers. The macrocycles showed typical aggregation-induced emission (AIE) effect and a high fluorescence quantum yield up to 92%. They could exhibit both circular dichroism (CD) and circularly polarized luminescence (CPL) signals in the presence of enantiomers of chiral acids. Moreover, the chiroptical signals in a film became stronger with the increasing rigidity of the macrocycles. Exceptionally, the chiroptical signals of the macrocycles in solid were ascribed to the induced prevailing single-handed propeller-like conformations of TPE units rather than to the supramolecular helical micro-/nanofiber self-assembled structure.

中文翻译：

TPE三角大环冠醚的手性由手性酸引起的螺旋桨状手性†

本文中，通过在顺式连接三个TPE冠醚单元，合成了带有三个冠醚环的新型四苯基乙烯（TPE）三角大环。-位与三个乙炔桥键合接头。大环表现出典型的聚集诱导发射（AIE）效应和高达92％的高荧光量子产率。在手性酸对映异构体存在的情况下，它们可能同时表现出圆二色性（CD）和圆极化发光（CPL）信号。而且，随着大环刚性的增加，膜中的手性信号变得更强。例外地，固体中大环的手性信号归因于TPE单元的普遍存在的单手螺旋桨状构象，而不是超分子螺旋微/纳米纤维自组装结构。

更新日期：2018-03-05

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