Fluorescence from Conjugated Polymer Aggregates in Dilute Poor Solution

Autor:	Shaw-An Chen, Jui-Hung Hsu, Wunshain Fann, Pei-Hsi Tsao, Kuen-Ru Chuang
Rok vydání:	1999
Předmět:	chemistry.chemical_classification chemistry.chemical_compound Quenching (fluorescence) Absorption spectroscopy Chemistry Emission spectrum Polymer Physical and Theoretical Chemistry Solubility Conjugated system Photochemistry Fluorescence Toluene
Zdroj:	The Journal of Physical Chemistry A. 103:2375-2380
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp983921t
Popis:	We examine a PPV derivative, viz. poly(2,5-dioctyloxy p-phenylene vinylene) (DOO−PPV) in poor solution. The solubility of DOO−PPV in toluene solution exhibits dramatic variation when cooled below room temperature. The fluorescence exhibits a characteristic red-shift emission spectrum during the cooling process. This fluorescence spectrum and the accompanying red-shift absorption spectrum suggest that the polymer forms dimer-like aggregates in dilute poor solution. The reduction in solubility also introduces a quenching effect. In comparing the photophysics of the film and the solutions, we can see that the films are comprised of individual polymer and interchain aggregates, but the fluorescence exhibits only the behavior of aggregates. At low temperature, additional light-emitting species result in spectral dynamics over several nanoseconds in the films. This indicates multiple emission species in polymer films.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::772dc5e1e4dfc29a40dcb700501ab228 https://doi.org/10.1021/jp983921t Zobrazit plný text záznamu