Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (2): 407-412.doi: 10.3866/PKU.WHXB201611032

• ARTICLE • Previous Articles     Next Articles

Chiral Luminescent Liquid Crystal Material Based on Europium-Substituted Polyoxometalate

Hong YUAN1,3,Jing ZHANG1,*(),Xue-Hong WEI3,*(),Hui-Min FANG3,Shi-Fang YUAN1,Li-Xin WU2,*()   

  1. 1 Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, P. R. China
    2 State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China
    3 College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P. R. China
  • Received:2016-09-23 Published:2017-01-12
  • Contact: Jing ZHANG,Xue-Hong WEI,Li-Xin WU E-mail:jingzhang@sxu.edu.cn;xhwei@sxu.edu.cn;wulx@jlu.edu.cn
  • Supported by:
    the National Key Basic Research Program of China (973)(2013CB834503);National Natural Science Foundation of China(21502107,21574057,21101101);Natural Science Foundation of Shanxi Province, China(2014021019-5);Scientific Research Start-up Funds of Shanxi University, China(020451801001);Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province, China(2016118);National Training Programs of Innovation and Entrepreneurship for Undergraduates, China and Scientific Instrument Center of Shanxi University, China(201610108010)

Abstract:

The incorporation of europium-substituted polyoxometalate (PM) into chiral amphiphiles is attractive for the fabrication of multifunctional chiral luminescent liquid crystalline materials. Chiral amphiphiles acted as good promoters to trigger the achiral PM to show induced supramolecular chirality through electrostatic interactions, as illustrated by circular dichroism (CD) spectra. Differential scanning calorimetry (DSC), polarized optical microscopy (POM), and temperature-dependent X-ray diffraction (XRD) analysis confirmed that the organic/inorganic hybrid polyoxometalate complex exhibited thermotropic mesomorphic behaviors. In a cast film, the complex displayed intrinsic luminescence that could be adjusted by accurately controlling the temperature. The electrostatic encapsulation of PM with chiral mesomorphic promoters provides an effective method for constructing PM-based chiral luminescent liquid crystalline materials.

Key words: Polyoxometalate, Optical activity, Liquid crystal, Luminescence, Supramolecular selfassembly, Surfactant

MSC2000: 

  • O644