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Deep‐Blue Fluorescent Particles via Microwave Heating of Polyacrylonitrile Dispersions
Author(s) -
Go Dennis,
Jurásková Alena,
Hoffmann Andreas,
Kapiti Gent,
Kuehne Alexander J. C.
Publication year - 2017
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600775
Subject(s) - polyacrylonitrile , fluorescence , conjugated system , materials science , polymer , microwave , photochemistry , dielectric , intramolecular force , chemical engineering , polymer chemistry , nanotechnology , optics , optoelectronics , chemistry , organic chemistry , composite material , physics , quantum mechanics , engineering
This study presents a new method to produce fluorescent particles. Established methods are based on the incorporation of conjugated dye molecules into dielectric polymer matrices or preparation of colloids, which are composed of fluorescent conjugated polymer. By contrast, this study presents a method where dielectric polyacrylonitrile is exposed to microwave radiation leading to an intramolecular cyclization reaction producing π‐conjugated segments, which fluoresce blue. During this conversion, the particles shrink in diameter but as an ensemble they retain their monodispersity. This work investigates the optimal reaction conditions and characterizes the optical properties.