Hyperbranched polyarylenes

Matthias Häußler; Jacky W.Y. Lam; Ronghua Zheng; Han Peng; Jingdong Luo; Junwu Chen; Charles C.W. Law; Ben Zhong Tang

doi:10.1016/j.crci.2003.06.003

Hyperbranched polyarylenes

Matthias Häußler, Jacky W.Y. Lam, Ronghua Zheng, Han Peng, Jingdong Luo, Junwu Chen, Charles C.W. Law, Ben Zhong Tang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

47 Citations (Scopus)

Abstract

Alkyne polycyclotrimerizations are effected by tantalum- and cobalt-based catalysts, giving soluble hyperbranched polyarylenes (HPAs) with high molecular weights (M_w up to~2 × 10⁵) in high yields (up to 99.9%). All the HPAs exhibit excellent thermal stability, losing little of their weights when heated to > 400 °C. The HPAs graphitize when pyrolyzed at 800 °C in high yields (up to 86%). Upon photoexcitation, the HPAs efficiently emit strong deep-blue and blue-green light with fluorescence quantum yields up to 98%. The HPAs strongly attenuate intense laser pulses, with their limiting performances being superior to that of C₆₀, a well-known optical limiter.

Original language	English
Pages (from-to)	833-842
Journal	Comptes Rendus Chimie
Volume	6
Issue number	8-10
DOIs	https://doi.org/10.1016/j.crci.2003.06.003
Publication status	Published - Aug 2003
Externally published	Yes

Research Keywords

alkyne polycyclotrimerization
hyperbranched polyarylenes
light emission
optical limiting
organometallic polymers
photoluminescence
thermal stability

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title = "Hyperbranched polyarylenes",

abstract = "Alkyne polycyclotrimerizations are effected by tantalum- and cobalt-based catalysts, giving soluble hyperbranched polyarylenes (HPAs) with high molecular weights (Mw up to~2 × 105) in high yields (up to 99.9%). All the HPAs exhibit excellent thermal stability, losing little of their weights when heated to > 400 °C. The HPAs graphitize when pyrolyzed at 800 °C in high yields (up to 86%). Upon photoexcitation, the HPAs efficiently emit strong deep-blue and blue-green light with fluorescence quantum yields up to 98%. The HPAs strongly attenuate intense laser pulses, with their limiting performances being superior to that of C60, a well-known optical limiter.",

keywords = "alkyne polycyclotrimerization, hyperbranched polyarylenes, light emission, optical limiting, organometallic polymers, photoluminescence, thermal stability",

author = "Matthias H{\"a}u{\ss}ler and Lam, {Jacky W.Y.} and Ronghua Zheng and Han Peng and Jingdong Luo and Junwu Chen and Law, {Charles C.W.} and Tang, {Ben Zhong}",

year = "2003",

month = aug,

doi = "10.1016/j.crci.2003.06.003",

language = "English",

volume = "6",

pages = "833--842",

journal = "Comptes Rendus Chimie",

issn = "1631-0748",

publisher = "Elsevier B.V.",

number = "8-10",

}

TY - JOUR

T1 - Hyperbranched polyarylenes

AU - Häußler, Matthias

AU - Lam, Jacky W.Y.

AU - Zheng, Ronghua

AU - Peng, Han

AU - Luo, Jingdong

AU - Chen, Junwu

AU - Law, Charles C.W.

AU - Tang, Ben Zhong

PY - 2003/8

Y1 - 2003/8

N2 - Alkyne polycyclotrimerizations are effected by tantalum- and cobalt-based catalysts, giving soluble hyperbranched polyarylenes (HPAs) with high molecular weights (Mw up to~2 × 105) in high yields (up to 99.9%). All the HPAs exhibit excellent thermal stability, losing little of their weights when heated to > 400 °C. The HPAs graphitize when pyrolyzed at 800 °C in high yields (up to 86%). Upon photoexcitation, the HPAs efficiently emit strong deep-blue and blue-green light with fluorescence quantum yields up to 98%. The HPAs strongly attenuate intense laser pulses, with their limiting performances being superior to that of C60, a well-known optical limiter.

AB - Alkyne polycyclotrimerizations are effected by tantalum- and cobalt-based catalysts, giving soluble hyperbranched polyarylenes (HPAs) with high molecular weights (Mw up to~2 × 105) in high yields (up to 99.9%). All the HPAs exhibit excellent thermal stability, losing little of their weights when heated to > 400 °C. The HPAs graphitize when pyrolyzed at 800 °C in high yields (up to 86%). Upon photoexcitation, the HPAs efficiently emit strong deep-blue and blue-green light with fluorescence quantum yields up to 98%. The HPAs strongly attenuate intense laser pulses, with their limiting performances being superior to that of C60, a well-known optical limiter.

KW - alkyne polycyclotrimerization

KW - hyperbranched polyarylenes

KW - light emission

KW - optical limiting

KW - organometallic polymers

KW - photoluminescence

KW - thermal stability

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-18144435463&origin=recordpage

U2 - 10.1016/j.crci.2003.06.003

DO - 10.1016/j.crci.2003.06.003

M3 - RGC 21 - Publication in refereed journal

SN - 1631-0748

VL - 6

SP - 833

EP - 842

JO - Comptes Rendus Chimie

JF - Comptes Rendus Chimie

IS - 8-10

ER -

Hyperbranched polyarylenes

Abstract

Research Keywords

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