TY - JOUR
T1 - Hyperbranched polyarylenes from copolycyclotrimerization
AU - Lin, Cheng
AU - Han, Peng
AU - Jing-dong, Luo
AU - Jacky W Y L , null
AU - Ben-zhong, Tang
PY - 2002/6
Y1 - 2002/6
N2 - High molecular weight hyperbranched polyarylenes were synthesized in high yields by one-pot copolycyclotrimerizations of 2,5-diethynylthiophene (1), 4,4′ -biphenyldiyne (2) and 2,7-diethynylfluorenes (3) with 1-heptyne (4) and 1-dodecyne (5) using TaCl5 · Ph4Sn catalysts in toluene. The structures and properties of the polymers were characterized and evaluated by IR, NMR, TGA, UV, fluorescence and optical limiting analyses. All the polymers possess high thermal stability and emit strong blue light upon UV irradiation, whose intensities are higher than that from poly (1-phenyl-1-octyne) (PPO), a well-known highly luminescent disubstituted polyacetylene. Little aggregation-induced red shift in the photoluminescence is observed in the thin films of the polymers.
AB - High molecular weight hyperbranched polyarylenes were synthesized in high yields by one-pot copolycyclotrimerizations of 2,5-diethynylthiophene (1), 4,4′ -biphenyldiyne (2) and 2,7-diethynylfluorenes (3) with 1-heptyne (4) and 1-dodecyne (5) using TaCl5 · Ph4Sn catalysts in toluene. The structures and properties of the polymers were characterized and evaluated by IR, NMR, TGA, UV, fluorescence and optical limiting analyses. All the polymers possess high thermal stability and emit strong blue light upon UV irradiation, whose intensities are higher than that from poly (1-phenyl-1-octyne) (PPO), a well-known highly luminescent disubstituted polyacetylene. Little aggregation-induced red shift in the photoluminescence is observed in the thin films of the polymers.
KW - Hyperbranched polyarylenes
KW - Light emission
KW - Light limiting
KW - Synthesis
UR - http://www.scopus.com/inward/record.url?scp=0036624644&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0036624644&origin=recordpage
U2 - 10.1007/BF02832631
DO - 10.1007/BF02832631
M3 - RGC 21 - Publication in refereed journal
SN - 1000-2413
VL - 17
SP - 86
EP - 89
JO - Journal Wuhan University of Technology, Materials Science Edition
JF - Journal Wuhan University of Technology, Materials Science Edition
IS - 2
ER -