Synthesis of poly(phenylacetylene)-based polydendrons consisting of a phenyleneethynylene repeating unit, and oxygen/nitrogen permeation behavior of their membranes
✍ Scribed by Takashi Kaneko; Kazuto Yamamoto; Motohiro Asano; Masahiro Teraguchi; Toshiki Aoki
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 375 KB
- Volume
- 278
- Category
- Article
- ISSN
- 0376-7388
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✦ Synopsis
Monodendrons consisting of m-linked phenyleneethynylene repeating unit with trimethylsilyl-, pentamethyldisiloxanyl-and nonamethyltetrasiloxanyl-peripheral groups were synthesized using the convergent approach. The focal point of monodendrons, terminal acetylene, was polymerized with rhodium catalyst to yield corresponding polydendrons with a high molecular weight. The polydendrons were solubile in common organic solvents, and readily formed membranes. Oxygen permselectivity was improved in the polydendrons with a space-persistent dendritic crowd. It was found that the well-defined dendritic and rod-like structure of the polydendrons was useful for pemselective membrane. Oxygen permselectivity was increased in polydendrons with a trimethylsilyl group compared to the corresponding zero generation poly(phenylacetylene) derivatives.