Preparation and Luminescent Properties of Linear Multi-hydroxy Polyester

doi:10.19894/j.issn.1000-0518.200376

Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (8): 938-945.DOI: 10.19894/j.issn.1000-0518.200376

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Preparation and Luminescent Properties of Linear Multi-hydroxy Polyester

ZHANG Qiao-Feng, LI Guo^*, JIANG Jin-Qiang, LIU Zhao-Tie

Key laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China

Received:2020-12-14 Revised:2021-04-10 Published:2021-08-01 Online:2021-10-01

Abstract

Abstract: Recent studies on non-traditional luminescence compounds mainly focus on the hyperbranched polymers, while linear polymers are rarely investigated. As a linear polymer is simple in structure and the raw materials are cheap, a linear multi-hydroxy polyester, poly(glycerol ketoglutarate) (PGK), is designed and synthesized. First, ketoglutarate acid is esterified with epichlorohydrin to synthesize the intermediate; Second, two reactions coupling cycles, i.e. the synthesized intermediate generated closed loop by dehydrochloration and water is removed with sodium, are used to prepare the monomer; Finally, ketoglutarate acid is esterified again with the prepared monomer to produce the polymer. It was characterized through proton nuclear magnetic resonance spectroscopy (¹H NMR), Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), ultraviolet visible spectroscopy (UV-Vis), fluorescence spectrum, transmission electron microscopy (TEM), dynamic light scattering (DLS), transient/steady state fluorescence spectrum, et al. The results show that the polyester compounds have good and stable luminescence performance, and the luminescence intensity varies exponentially with concentrations of the polymer solution. Moreover, the induced luminescence efficiency could be significantly enhanced due to the clustering effect, showing good luminescence performance regulation behavior. The average fluorescence life and the fluorescence quantum yield is 5.28 ns and 10.7%, respectively.

Key words: Non-traditional luminescence, Multi-hydroxy polyester, Clustering-triggered emission, Luminescent material

CLC Number:

O633

ZHANG Qiao-Feng, LI Guo, JIANG Jin-Qiang, LIU Zhao-Tie. Preparation and Luminescent Properties of Linear Multi-hydroxy Polyester[J]. Chinese Journal of Applied Chemistry, 2021, 38(8): 938-945.

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Preparation and Luminescent Properties of Linear Multi-hydroxy Polyester

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