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Synthesis of Cobalt Containing Block Copolymers Via Ring Opening Metathesis Polymerizastion (ROMP)

Journal of Rare Earths 2004年第Z2期22卷 145-152页

作者： bongjin moon minhyuk kang Departmen of Chemistry Sogang UniversityShinsoo-Dong 1-1Mapo-GuSeoul121-742Korea Departmen of ChemistrySogang UniversityShinsoo-Dong 1-1Mapo-GuSeoul121-742Korea

In order to realize a metal containing nano-structure, a block-copolymer containing alkynyl groups in one block was designed and synthesized by living ring opening metathesis polymerization (ROMP) technique. The newly developed bis-3-bromopyridine complex of Grubbs catalyst was employed in the series of polymerization and it yielded the desired polymers with great molecular weight control and narrow polydispersities. The characteristics of the block copolymers were investigated by gel permeation chromatography, H- and 13H- NMR spectroscopy. Complexation of the alkynyl group containing block copolymers by treatment with dicobalt octacarbonyl occurred smoothly in 5 min at room temperature. GPC analysis before and after cobalt complexation indicated a significant increase of the hydrodynamic volume. AFM images of the films before and after the complexation also showed a noticeable change in its morphology where grain sizes become smaller and more regular upon complexation.

关键词： ring opening metathesis polymerization (ROMP) metal containing block copolymer polynorbornene derivative

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Synthesis of Cobalt Containing Block Copolymers Via Ring Opening Metathesis Polymerizastion （ROMP）

Synthesis of Cobalt Containing Block Copolymers Via Ring Ope...

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The 8th China-Korea Workshop on Advanced Materials

作者： bongjin moon minhyuk kang Departmen of Chemistry Sogang UniversityShinsoo-Dong 1-1Mapo-GuSeoul 121-742Korea Departmen of Chemistry Sogang UniversityShinsoo-Dong 1-1Mapo-GuSeoul 121-742Korea

＜正＞ In order to realize a metal containing nano-structure, a block-copolymer containing alkynyl groups in one block was designed and synthesized by living ring opening metathesis polymerization （ROMP） technique. The newly developed bis-3-bromopyridine complex of Crubbs catalyst was employed in the series of polymerixation and it yielded the desired polymers with great molecular weight control and narrow polydispersities. The characteristics of the block copolymers were investigated by gel permeation chromatography, H- and 13H- NMR spectroscopy. Complexation of the alkynyl group containing block copolymers by treatment with dicobalt octacarbonyl occurred smoothly in 5 min at room temperature. GPC analysis before and after cobalt complexation indicated a significant increase of the hydrodynamic volume. AFM images of the films before and after the complexation also showed a noticeable change in its morphology where grain sizes become smaller and more regular upon complexation.

关键词： ring opening metalhesis polymerization (ROMP) metal containing block copolymer polynorbornene

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