Premium
Synthesis and Fluorescent Properties of Chiral Polymer Complexes Incorporating Bipyridine and Eu(III) or Gd(III)
Author(s) -
ZONG Lili,
MIAO Qian,
LIU Yan,
XU Jinqian,
HUANG Xiaobo,
CHENG Yixiang
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990198
Subject(s) - chemistry , fluorescence , polymer , moiety , polymerization , conjugated system , trifluoromethyl , polymer chemistry , bipyridine , photochemistry , crystallography , 2,2' bipyridine , stereochemistry , organic chemistry , crystal structure , physics , alkyl , quantum mechanics
Chiral polymer P‐1 was synthesized by the polymerization of ( R )‐5,5′‐dibromo‐6,6'‐di(4‐trifluoromethyl‐ phenyl)‐2,2′‐bisoctoxy‐1,1'‐binaphthyl ( R ‐M‐1 ) with 5,5′‐divinyl‐2,2′‐bipyridine ( M‐2 ) via Pd‐catalyzed Heck reaction. The polymer complexes P‐2 and P‐3 could be obtained by the bipyridyl coordination of P‐1 with Eu(TTA) 3 ·2H 2 O and Gd(TTA) 3 ·2H 2 O (TTA − =1‐(2‐thenoyl)‐3,3,3‐trifluoroacetonate). The chiral polymer P‐1 shows strong blue fluorescence due to the extended ‐electronic structure between the chiral repeating unit ( R )‐6,6'‐di(4‐trifluoromethyl‐phenyl)‐2,2′‐bisoctoxy‐1,1'‐binaphthyl and the conjugated linker 2,2′‐bipyridyl (bpy) group via vinylene bridge. The Eu(III)‐containing polymer complex P‐2 can not only emit the polymer fluorescence, but also have the characteristic fluorescence of Eu(III) ( 5 D 0 → 7 F 2 ) under different exciting wavelengths. The Gd(III)‐containing polymer complex P‐3 only emits the polymer fluorescence. Based on the fluorescent properties of the polymer and RE(III)‐containing polymer complexes, it can be concluded that the chiral polymer does not transfer energy to Eu(III) or Gd(III) complex moiety but emits its own fluorescence.