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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 42, Number 3
JKCSEZ 42(3)
June 20, 1998 

Preparation and Termination of Carbosilane Dendrimer Based on Siloxane Tetramer

실옥산테트라머를 이용한 나뭇가지꼴 실란거대분자의 제조와 정지반응
Chungkyun Kim, Eunmi Park

Siloxane tetramer(Me(CH2=CH)SiO)4를 중심분자로 한 나뭇가지꼴 거대분자(제1세대-제4세대)를 allylmagnesium bromide와 dichloromethylsilane를 이용한 alkenylation과 hydrosilation 반응를 통해 제조하였다. Dichlorosilyl기를 가진 G4세대와 p-bromophenol, p-phenylphenol, lithium phenylethynylide등과의 반응에서 특정기능을 가지는 G4P-BP(Mw: 16,300), G4P-PP(16,121), G4P-PA(11,764) 등이 합성되었다. 새롭게 형성된 나뭇가지꼴 거대분자는 NMR, UV, MALDI mass의 분석에 의해 균일한 구조를 가지고 있음이 확인되었다.

Dendritic macromolecules of the first to fourth generation were synthesized, using alkenylation and hydrosilation cycles with allylmagnesium bromide and dichloromethylsilane as building blocks and siloxane tetramer (Me(CH2=CH)SiO), as core molecule. By the reaction of the dichloromethylsilyl-capped generation (G4P) with p-bromophenol, p-phenylphenol and lithium phenyethynylide, dendrimers with specific functions (G4P-BP (Mw: 16,300), G4P-PP (16,121), and CAP-PA (11,764)) have been produced. Analysis of new dendrimers by NMR, UV and MALD1 mass spectrometry suggests that they are pure and unified.

277 - 284
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