Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (5): 20260051.doi: 10.7503/cjcu20260051

• Article • Previous Articles     Next Articles

In situ Multiple Optical Monitoring of Bulk Polymerization

ZHANG Ruiqing, YIN Kuo, CHEN Yanjie, GU Fan, LIU Jian(), MA Xiang   

  1. School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China
  • Received:2026-01-28 Online:2026-05-10 Published:2026-03-10
  • Contact: LIU Jian E-mail:liujianecust@ecust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22125803);the National Natural Science Foundation of China(22308102);the National Natural Science Foundation of China(T2488302);the Guangxi Department of Science and Technology, China(AA23062016)

Abstract:

Optical visualization provides a highly sensitive, non-invasive, and straightforward approach for the in situ monitoring of bulk polymerization processes. This paper synthesized a 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine(DPAC)-based molecule, whose distinct excited-state conformational responses under different micro- environments enabled the monitoring of microscopic dynamic changes within the system. During the polymerization of methyl methacrylate(MMA), the system transfer from a liquid monomer to a solid polymer. Accompanying this process, the fluorescence of DPAC shifts from red to blue, reflecting the increase in local viscosity and the restriction of molecular motion. Subsequently, the gradual enhancement of phosphorescence and the extension of its lifetime indicate the rising rigidity of the polymer network. Through dual-channel monitoring based on ratio-metric fluorescence and phosphorescence, this strategy makes the visual tracking of bulk polymerization feasible.

Key words: In situ monitoring, Bulk polymerization, Vibration-induced emission

CLC Number: 

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