Citation: YUAN Hong, ZHANG Jing, WEI Xue-Hong, FANG Hui-Min, YUAN Shi-Fang, WU Li-Xin. Chiral Luminescent Liquid Crystal Material Based on Europium-Substituted Polyoxometalate[J]. Acta Physico-Chimica Sinica, ;2017, 33(2): 407-412. doi: 10.3866/PKU.WHXB201611032 shu

Chiral Luminescent Liquid Crystal Material Based on Europium-Substituted Polyoxometalate

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 Date: 23 September 2016
Revised Date: 2 November 2016

Fund Project: The project was 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), and National Training Programs of Innovation and Entrepreneurship for Undergraduates, China (201610108010) and Scientific Instrument Center of Shanxi University, China.

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.
- Polyoxometalate,
- Optical activity,
- Liquid crystal,
- Luminescence,
- Supramolecular selfassembly,
- Surfactant
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