Chiroptical Property of TPE Triangular Macrocycle Crown Ethers from Propeller-Like Chirality Induced by Chiral Acids

May 24, 2018

Title

Chiroptical Property of TPE Triangular Macrocycle Crown Ethers from Propeller-Like Chirality Induced by Chiral Acids

Author

Yan-Song Zheng, Wei-Guo Qiao, Jia-Bin Xiong, Ying-Xue Yuan, Hong-Chao Zhang, Minghua Liu, Dong Yang

Year

2018

Journal

Journal of Materials Chemistry C

Abstract

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

Instrument

J-810

Keywords

Circular dichroism, Stereochemistry, Materials