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Effect of nanoscale confinement on fluorescence of MEH‐PPV/MCM‐41 composite
Author(s) -
Telbiz German M.,
Posudievsky Oleg Yu.,
Dementjev Andrei,
Kiskis Juris,
Gulbinas Vidmantas,
Valkunas Leonas
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201026151
Subject(s) - fluorescence , nanoscopic scale , composite number , materials science , exciton , kinetics , diffusion , polymer , relaxation (psychology) , phenylene , photochemistry , chemical engineering , analytical chemistry (journal) , nanotechnology , chemistry , composite material , optics , condensed matter physics , organic chemistry , thermodynamics , psychology , social psychology , physics , quantum mechanics , engineering
Fluorescence spectra and kinetics of poly(2‐methoxy‐5‐(2′‐ethylhexyloxy)‐1,4‐phenylene vinylene) (MEH‐PPV)/MCM41 silica composite have been analyzed at different temperatures and compared with fluorescence properties of MEH‐PPV solutions and spin coated films. As follows from this comparison, the composite possesses significantly wider fluorescence spectra, longer fluorescence relaxation and weaker temperature dependence of its intensity. These peculiarities are explained in terms of the reduced exciton diffusion and an increased torsional disorder of polymer chains embedded in pores.