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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

942
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
942

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Fluorescence Self-Reporting Precipitation Polymerization Based on Aggregation-Induced Emission for Constructing

Guan Wang1, Liangyu Zhou1, Pengfei Zhang2

  • 1Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Materials Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Chaoyang District, Beijing, 100029, China.

Angewandte Chemie (International Ed. in English)
|December 13, 2019
PubMed
Summary

A new fluorescence method using aggregation-induced emission (AIE) monitors precipitation polymerization in real time. This allows for better understanding and creation of tunable polymeric fluorescent particles (PFPs) for biomedical uses.

Keywords:
aggregation-induced emissionfluorescenceoptical nanoagentsphoto-controllable immunotherapyprecipitation polymerization

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Precipitation polymerization is crucial for energy, environmental, and biomedical applications.
  • Understanding the polymerization mechanism is key to optimizing its use.
  • Current methods lack real-time mechanistic insights.

Purpose of the Study:

  • To develop a real-time monitoring method for precipitation polymerization.
  • To elucidate the nucleation, growth, and phase-separation dynamics.
  • To synthesize tunable polymeric fluorescent particles (PFPs) using this method.

Main Methods:

  • Utilized a fluorescence self-reporting approach based on aggregation-induced emission (AIE).
  • Monitored the copolymerization of a vinyl-modified AIEgen, styrene, and maleic anhydride.
  • Tracked fluorescence changes to discern phase-separation and dynamic hardening.

Main Results:

  • Successfully monitored nucleation and growth processes in real time.
  • Clearly discerned phase-separation and dynamic hardening through fluorescence tracking.
  • Obtained uniform and tunable polymeric fluorescent particles (PFPs) in a self-stabilized manner.

Conclusions:

  • The AIE-based fluorescence method provides mechanistic insights into precipitation polymerization.
  • PFPs synthesized show promise for biolabeling and photosensitizing applications.
  • These PFPs are effective optical nanoagents for photo-controllable immunotherapy, highlighting biomedical potential.