LINEAR AND HYPERBRANCHED POLYMERS WITH HIGH THERMAL STABILITY AND LUMINESCENCE EFFICIENCY

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LINEAR AND HYPERBRANCHED POLYMERS WITH HIGH THERMAL STABILITY AND LUMINESCENCE EFFICIENCY

Papers | Updated：2021-06-21

- LINEAR AND HYPERBRANCHED POLYMERS WITH HIGH THERMAL STABILITY AND LUMINESCENCE EFFICIENCY
- Vol. 19, Issue 6, Pages: 585-590(2001)
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- Published：20 December 2001
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LINEAR AND HYPERBRANCHED POLYMERS WITH HIGH THERMAL STABILITY AND LUMINESCENCE EFFICIENCY[J]. 2001, 19(6): 585-590.
DOI：

LINEAR AND HYPERBRANCHED POLYMERS WITH HIGH THERMAL STABILITY AND LUMINESCENCE EFFICIENCY[J]. 2001, 19(6): 585-590. DOI：

摘要

New acetylene monomers

6-{[(1-naphthylethynyl-4-phenyl)carbonyl]oxy}-1-pheny-1-hexyne (1)

5-diethynyl-thiophene (3)

and 4

4'-diethynylbiphenyl(6) were synthesized. Homopolymerization of 1 and copolycyclotrimerizations of 3and 6 with 1-heptyne and 1-octyne have been achieved with WCl6- and TaCl5-Ph4Sn catalysts

respectively

giving solublelinear disubstituted polyacetylene (2) and hyperbranched polyarylenes (5 and 8) with high molecular weights (up to 1.2×105) in high yields (up to 98%).The structures and properties of the polymers are characterized and evaluated by IR

NMR

TGA

photoluminescence(PL)

and electroluminescence (EL) analyses.All the polymers possess high thermal stability and emit strong blue light upon photoexcitation.The intensity of the emitted light is greater than that of poly(1-phenyl-1-octyne)

a well-known highly luminescent disubstituted polyacetylene.Little aggregation-induced red shift in the PL was observed in the thin films of the polymers.By constructing a multi-layer EL device

high EL quantum yield (0.18%) has been achieved in 2

which are the best results for substituted polyacetylenes attainable so far.

Abstract

New acetylene monomers

6-{[(1-naphthylethynyl-4-phenyl)carbonyl]oxy}-1-pheny-1-hexyne (1)

5-diethynyl-thiophene (3)

and 4

4'-diethynylbiphenyl(6) were synthesized. Homopolymerization of 1 and copolycyclotrimerizations of 3and 6 with 1-heptyne and 1-octyne have been achieved with WCl6- and TaCl5-Ph4Sn catalysts

respectively

NMR

TGA

photoluminescence(PL)

a well-known highly luminescent disubstituted polyacetylene.Little aggregation-induced red shift in the PL was observed in the thin films of the polymers.By constructing a multi-layer EL device

high EL quantum yield (0.18%) has been achieved in 2

which are the best results for substituted polyacetylenes attainable so far.

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