Publication Type Journal Article
Title Synthesis and Characterization of Perylenediimide Labeled Core-Shell Hybrid Silica-Polymer Nanoparticles
Authors Tânia Ribeiro Carlos Baleizão José Paulo Farinha
Groups
Journal JOURNAL OF PHYSICAL CHEMISTRY C
Year 2009
Month October
Volume 113
Number 42
Pages 18082-18090
Abstract We have successfully synthesized core-shell nanoparticles with a silica fluorescent core and a methacrylate shell for application in photoactive high performance coatings and paints. Silica core particles with diameters between 270 and 440 nm and low polydispersity were labeled with a perylenediimide derivate with two terminal alkoxysilyl groups. Pure silica nanoparticles with equivalent diameters were also synthesized and surface modified with a second perylenediimide derivative. The photophysical properties of both sets of nanoparticles were studied for polarity environment dependence and dye aggregation. The fluorescent silica nanoparticles were surface modified with 3-(trimethoxysilyl)propyl methacrylate and used as seeds ill the emulsion polymerization of a butyl or methyl methacrylate shell. Fluorescence correlation spectroscopy (FCS) was used to characterize the core-shell nanoparticles, using the fluorescent silica particles to calibrate the system. Films cast from water dispersions of clean core-shell nanoparticles are flexible, transparent, and exhibit fluorescence under appropriate excitation.
DOI http://dx.doi.org/10.1021/jp906748r
ISBN
Publisher
Book Title
ISSN 1932-7447
EISSN
Conference Name
Bibtex ID ISI:000270671100017
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