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A Platform for Preparation of Monodispersed Fluorescent Conjugated Polymer Microspheres with Core‐Shell Structures
Author(s) -
Wang Shangli,
Zhao Wei,
Song Jing,
Cheng Si,
Fan LiJuan
Publication year - 2013
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.201200560
Subject(s) - fluorescence , polymer , materials science , thermal stability , conjugated system , chemical engineering , microsphere , core (optical fiber) , adsorption , polymer chemistry , spheres , shell (structure) , nanotechnology , chemistry , composite material , optics , physics , astronomy , engineering
A strategy to prepare stable monodispersed fluorescent microspheres is developed by modifying the Wessling method to synthesize poly(p‐phenylenevinylene) (PPV) on the surface of a highly crosslinked polymer core. The positively charged PPV polymer precursors (pre‐PPV) are adsorbed onto the core with negative charges on the surface and then the insoluble fluorescent PPVs form after thermal elimination. Each individual sphere is found to possess a very smooth surface with an even distribution of fluorescence by microscopic techniques. Very small coefficient of variance (CV) values of emission intensity (<4.0%) and size (<2.3%) are realized for microspheres prepared in the same batch. The spheres are demonstrated to have good thermal stability and photostability.