Synthesis, characterization and optical properties of a novel Si-containing σ-π-conjugated hyperbranched polymer

Giseop Kwak; Toshio Masuda

doi:10.1002/1521-3927(20020101)23:1<68::AID-MARC68>3.0.CO;2-Z

Synthesis, characterization and optical properties of a novel Si-containing σ-π-conjugated hyperbranched polymer

Giseop Kwak, Toshio Masuda

Kyoto University

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The polymerization of bis(4-ethynyl-phenyl)methylsilane catalyzed by RhI(PPh₃)₃ afforded a regio- and stereoregular hyperbranched polymer, hb-poly[(methylsilylene)bis(1,4-phenylene-trans-vinylene] (poly(1)), containing 95% trans-vinylene moieties. The weight loss of this polymer at 900°C in N₂ was 9% Poly(1) displayed an absorption due to π-π* transition around 275 nm as a shoulder and a weak absorption around 330 nm due to π-to-σ charge transfer, which was hardly seen in the corresponding linear polymer.

Original language	English
Pages (from-to)	68-72
Number of pages	5
Journal	Macromolecular Rapid Communications
Volume	23
Issue number	1
DOIs	https://doi.org/10.1002/1521-3927(20020101)23:1<68::AID-MARC68>3.0.CO;2-Z
State	Published - 9 Jan 2002

Keywords

Hyperbranched
Optical properties
Silicon-containing polymers
Stereoregular polymers
Thermal properties

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10.1002/1521-3927(20020101)23:1<68::AID-MARC68>3.0.CO;2-Z

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abstract = "The polymerization of bis(4-ethynyl-phenyl)methylsilane catalyzed by RhI(PPh3)3 afforded a regio- and stereoregular hyperbranched polymer, hb-poly[(methylsilylene)bis(1,4-phenylene-trans-vinylene] (poly(1)), containing 95% trans-vinylene moieties. The weight loss of this polymer at 900°C in N2 was 9% Poly(1) displayed an absorption due to π-π* transition around 275 nm as a shoulder and a weak absorption around 330 nm due to π-to-σ charge transfer, which was hardly seen in the corresponding linear polymer.",

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AB - The polymerization of bis(4-ethynyl-phenyl)methylsilane catalyzed by RhI(PPh3)3 afforded a regio- and stereoregular hyperbranched polymer, hb-poly[(methylsilylene)bis(1,4-phenylene-trans-vinylene] (poly(1)), containing 95% trans-vinylene moieties. The weight loss of this polymer at 900°C in N2 was 9% Poly(1) displayed an absorption due to π-π* transition around 275 nm as a shoulder and a weak absorption around 330 nm due to π-to-σ charge transfer, which was hardly seen in the corresponding linear polymer.

KW - Hyperbranched

KW - Optical properties

KW - Silicon-containing polymers

KW - Stereoregular polymers

KW - Thermal properties

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Synthesis, characterization and optical properties of a novel Si-containing σ-π-conjugated hyperbranched polymer

Abstract

Keywords

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