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Updated: Feb 1, 2026

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
Published on: June 2, 2017
Synthesis of Negative-Charged Metal-Containing Cyclomatrix Polyphosphazene Microspheres Based on Polyoxometalates and
Junping Zhang1, Zhiliang Miao1, Jing Yan1
1Department of Applied Chemistry, School of Science MOE Key Lab for Materials Physics and Chemistry Extraordinary Condition, Northwestern Polytechnical University, Xi'an, 710129, Shaanxi, China.
Abstract:
A negative-charged, metal-containing cyclomatrix polyphosphazene microsphere (MCPM) is synthesized using the strategy of precipitation polymerization of di-functionalized polyoxometalates (POMs) and hexachlorocyclotriphosphazene. The chemical structure of these MCPMs is well characterized by 13 C MAS NMR and 31 P MAS NMR, as well as FT-IR, electron microscopy, and X-ray photoelectron spectroscopy. The covalent grafting of the rigid POMs clusters into the framework of these microspheres prevents the collapsing of the pores, making these MCPMs porous materials. Taking advantage of the porous structure and the negative charges in the frameworks, these materials show interesting charge-selective adsorption properties, as demonstrated by the selective adsorption of positive-charged dyes in comparison with negative-charged dyes.
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