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A New Poly(fluorene‐ co ‐carbazole) with a Large Substituent Group at the 9‐Position of the Carbazole Moiety: An Efficient Blue Emitter
Author(s) -
Du Junping,
Fang Qiang,
Bu Dongsheng,
Ren Shijie,
Cao Amin,
Chen Xiaoyao
Publication year - 2005
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.200500460
Subject(s) - carbazole , fluorene , substituent , moiety , anthracene , photochemistry , materials science , quantum yield , chemistry , organic chemistry , fluorescence , polymer , physics , quantum mechanics
Summary: A new poly(fluorene‐ co ‐carbazole) (PFC‐1) with a large substituent group (ADN, a naphthalene‐anthracene derivative moiety) at the 9‐position of carbazole was synthesized. Compared with poly(fluorene‐ co ‐carbazole)s that have an alkyl substituent group at the 9‐position of the carbazole, the UV‐vis absorption (or photoluminescent emission) peaks of PFC‐1 are in almost the same position both in solution and in the solid state, whereas films of the former give peaks at longer wavelengths than those in solution. The photoluminescent (PL) spectra of PFC‐1 indicate that the attachment of ADN to the poly(fluorene‐ co ‐carbazole)s gives rise to an efficient blue emission from non‐aggregated ADN. There is no difference evident between PFC‐1 and other reported poly(fluorene‐ co ‐carbazole)s in PL quantum yield, thermostability, and electrochemical behavior, which suggests that PFC‐1 is an efficient blue emitter.UV‐Vis spectra of the poly(fluorene‐ co ‐carbazole) (PFC‐1), with a large substituent group (ADN, a naphthalene‐anthracene derivative moiety) at the 9‐position of carbazole, in toluene and in the film.