Premium
A new blue light‐emitting oligofluorene glass: synthesis, characterization and photophysical properties
Author(s) -
Belfield Kevin D.,
Bondar Mykhailo V.,
Morales Alma R.,
Yavuz Ozlem,
Przhonska Olga V.
Publication year - 2003
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.593
Subject(s) - chemistry , electroluminescence , chromophore , photochemistry , quantum yield , intramolecular force , glass transition , fluorescence , absorption (acoustics) , thermal stability , diamine , derivative (finance) , photoluminescence , emission spectrum , oligomer , analytical chemistry (journal) , spectral line , polymer chemistry , stereochemistry , optoelectronics , organic chemistry , polymer , materials science , optics , physics , layer (electronics) , economics , financial economics , composite material , astronomy
The synthesis, electrochemical, thermal and spectroscopic properties of the oligoaminofluorene derivative 9,9‐didecyl‐ N , N ‐bis(9,9‐didecyl‐7‐ N , N ‐diphenylaminofluoren‐2‐yl)‐ N , N ‐diphenylfluorene‐2,7‐diamine ( 4 ), an organic glass, were investigated in solvents of differing polarity at room and 77 K temperature, including quantum yield and lifetime. The oligomer exhibited a glass transition near room temperature and was thermally stable to ca 400 °C. Intramolecular interactions between the fluorenyl chromophores were investigated. The relatively complex nature of the emission band of 4 was characterized by reduced anisotropy and two components in its fluorescence decay at room temperature. Emission spectra of 4 at 77 K exhibited a single component in its fluorescence decay and a dependence on the excitation wavelength at the red edge of the absorption band. A spectroscopic model of 4 is proposed to explain the observed spectral behavior of this potentially important electroluminescent material. Copyright © 2003 John Wiley & Sons, Ltd.