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김정균,박은미,강은주,Kim, Chungkyun,Park, Eunmi,Kang, Eunju 대한화학회 1995 대한화학회지 Vol.39 No.10
96개의 allyl기를 가진 나무가지꼴 실란 거대분자를 alkenylation 과 hydrosilylation의 반복된 과정을 경유하여 매우 높은 수율로 합성하였다. 이 두 과정을 통해서 나무가지꼴 거대분자는 크로마토그래피법을 이용한 정제법(silica hel, chloroform)에서 순수한 물질을 얻어졌음이 $/_1/H,\;/_13/CNMR$과 원소분석 등에 의해 확인되었다. Silane dendrimer with 96 allylic end groups has been synthesized in excellent yield using repetitive alkenylation-hydrosilylation cycles. Each of the two steps provided the products in almost quantitative yields. After a simple chromotograpic purification (silica gel, chloroform), pure dendrimers were obtained and their purity was checked with 1H, 13C NMR spectroscopic method and elemental analysis.
김정균,박은미,정인경,주광석,Kim, Chungkyun,Park, Eunmi,Jung, Inkyung,Joo, Kwangsuk 대한화학회 1995 대한화학회지 Vol.39 No.10
Silyltriflate는 phenyl기가 포함된 규소화합물을 $CF/_3/SO/_3/H$와 반응시켜 얻어진다. Silyltriflate와 allylmagnesium bromide와의 반응에서는 allyl기가 포함된 실란 유도체 $R/_2/SiHCH/_2/CH\;=\;CH/_2/(R\;=\;Me,Ph)$이 형성되었다. 이 화합물은 백금 촉매하에서 polycarbosilane을 형성하였으며 polycarbosilane의 Si-Ph 결합은 다시 트리플산에 의해 polycarbosilane의 triflat 유도체를 형성하였다. Silyltriflates are obtained by reaction of the corresponding phenyl derivatives with CF3SO3H. The reaction of silyltriflate with allylmagnesium bromide produced the allylated silane derivatives R2SiHCH2CH=CH2 (R=Me, Ph). They are formed under mild condition with Pt catalysis to polycarbosilane. The cleavage of silicon-phenyl bonds of polysilane by CF3SO3H leads to triflate derivatives of polycarbosilane.
김정균,성대동,정대일,박은미,강은주,Kim, Chungkyun,Sung, Dae-Dong,Chung, Dae-il,Park, Eunmi,Kang, Eunju 대한화학회 1995 대한화학회지 Vol.39 No.10
발산형 성장법에 의한 64개의 allyl기를 가진 나무가지꼴 실란 거대분자를 제조하였다. 그 제법은 alkenylation 과 hydrosilylation 반복되는 순환과정을 경유하였으며 각 과정은 NMR에 의해 확인되었다. 이 두 과정에서는 모두 정량적이며 순수한 나무가지꼴 고분자를 제공하였다. The silanedendrimer with 64 allylic end groups was prepared via a divergent growth approach. The reaction path of the repetitive alkenylation and hydrosilylation cycles was monitored by NMR spectroscopic analysis. Each of the two steps provided almost quantitative yields of pure dendrimers.
HOPG 기판 위에 누적된 Dendritic Silsesquioxane (G3-9Ph) LB 박막의 모폴로지 분석
성기찬(Gi-Chan Sung),이지윤(Ji-Yoon Lee),신대식(Dae-Sik Shin),김정균(Chungkyun Kim),권영수(Young-Soo Kwon) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
The Langmuir-Blodgett (LB) method has been one of the most suitable techniques for fabricating organic thin films with well-controlled structures, compositions and thickness at the molecular level. We investigated the surface activity of dendrimer films at air-water interface by π-A isotherm. Also, we attempted to fabricate a G3-9Ph dendritic silsequioxane LB films. And their surface morphologies were observed by atomic force microscopy (AFM).
Silsesquioxane Dendrimer (G2-6Ph) LB막의 제작 및 전기전도 특성
성기찬(Gi-Chan Sung),박기훈(Ki-Hoon Park),김경철(Gyong-Chol Kim),신훈규(Hoon-Kyu Shin),김정균(Chungkyun Kim),권영수(Young-Soo Kwon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
The Langmuir-Blodgett (LB) method has been one of the most suitable techniques for fabricating organic thin films with well-controlled structures, compositions and thickness at the molecular level. We investigated the surface activity of dendrimer films at air-water interface by π-A isotherm. Also, we attempted to fabricate a G2-6Ph LB films. Their surface morphologies and electrical properties were observed by STM / STS (Scanning Tunneling Microscopy / Spectroscopy).
STM을 이용한 Siloxane Dendrimer(G1P-6CI) LB막의 모폴로지 특성 연구
성기찬(Gi-Chan Sung),이지윤(Ji-Yoon Lee),신대식(Dae-Sik Shin),김정균(Chungkyun Kim),권영수(Young-Soo Kwon) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
The Langmuir-Blodgett (LB) method has been one of the most suitable techniques for fabricating organic thin films with well-controlled structures, compositions and thickness at the molecular level. We investigated the surface activity of dendrimer films at air-water interface by π-A isotherm. Also, we attempted to fabricate a G1P-6CI siloxane dendrirner LB films. And their surface morphologies were observed by scanning tunneling microscopy (STM).