• 대한화학회지
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• 제41권2호
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• pp.88-97
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• 1997

실릴트리플레이트$(Ph_{3-n}SiH(OTf)_n))$는 낮은 온도에서 트리펜일실란과 트리플산$(CF_3SO_3H)$의 반응에 의해 형성되며 이러한 화합물은 새로운 기능성 실란 유도체의 제조에 이용되고 있다. 실릴트리플레이트와 알캔일-, 알킨일마그네슘 브롬아이드 그리고 유기리티움 화합물과의 반응에 의해 새로운 실란 화합물 Ph_2SiHR(R=C{\equiv}(CPh,\;CH=CH_2,\;CH_2CH=CH_2,\;(CH_2)_2CH=CH_2,\;(CH_2)_3CH=CH_2)$을 높은 수율로 얻었다. 합성된 알켄일-, 알킨일실란은 백금촉매 하에서 카보실란 고분자$((Ph_2Si(CH_2)m)n;\;m=2∼4,\;n\le10)$5~6환고리 화합물을 형성하였다. 모든 생성물들은 NMR, UV, IR, 질량분석, 그리고 원소분석법에 의해 확인되었다.

• Bulletin of the Korean Chemical Society
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• 제30권4호
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• pp.873-881
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• 2009

Bis(phenylethynyl)dimethylsilane is branched by the hydrosilation of the phenylethynyl group with dichloromethylsilane, and then the resulting chlorosilane is reacted with lithium phenylacetylide to give the $1^{st}$ generation. The same hydrosilation and alkynylation are repeated to obtain the $7^{th}$ generation. In addition peripheral Si-Cl moiety of the seven kind generation dendrimers are reacted with alcoholic moiety of 9-hydroxymethylanthracene and 2-(2-hydroxyphenyl)benzoxazole group in the presence of TMEDA. Then three kinds of carbosilane dendrimers are prepared from the $1^{st}$ to the $7^{th}$ generations, the $7^{th}$ generation of each dendrimer has 256 phenylethynyl, 256 9-anthracenylmethoxy, or 128 2-(2-phenoxy)benzoxazole groups. Each synthesized dendrimer is unequivocally characterized by $^1H\;and\;^{13}C\;NMR$, elemental analysis, MALDI-MS, GPC, and PL (photoluminescence). Characteristically PDI (Polydisperse Index) values of the dendrimers’ peak in GPC are in the range of $1.00{\sim}1.07$, which indicates that each generation of carbosilane is in unified distribution. PL spectra of phenylethynyl and 9- anthracenemethoxy group substituted dendrimers show no significant change with increasing the generation from the $1^{st}$ to the $7^{th}$. However, the PL spectra of 2-(2-phenoxy)benzoxazole group substituted dendrimers show a blue-shift trend with increasing the generation from the $1^{st}$ to the $7^{th}$.

• Bulletin of the Korean Chemical Society
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• 제28권11호
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• pp.1963-1966
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• 2007

Carbosilane dendrimers with silafluorenyl groups on the periphery were prepared by the reaction of 2,2'- dilithiumbiphenyl and dichlorosilyl groups on the carbosilane dendrimers at low temperature. The 1st to 4th generation of dendrimers with silafluorenyl groups were obtained with high yields and the products were purified by column chromatography. The unified properties of the dendrimers were measured by gel permeation chromatography (GPC) and displayed very low and regular polydispersity index (PDI) value. The silafluorenyl moieties on dendritic periphery accepted the potassium fluoride ions which were stabilized by criptand [222], and it proved strong photoluminescent properties.

• 통합자연과학논문집
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• 제2권1호
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• pp.1-12
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• 2009

This miniaccount presents the selective examples of our recent discoveries in the photopolymerization of vinyl monomers using the organic initiators such as hydrosilanes, poly(hydroarylsilane)s, benzoin silyl ethers, and thianthrene cation radical. In the photopolymerization of vinyl monomers with silanes polysilanes, while the polymerization yields and polymer molecular weights of the poly(MMA)s containing the silyl moieties decreased, the TGA residue yields and intensities of SiH stretching IR bands increased as the mole ratio of the silanes over MMA increased. The hydroarylsilane and poly(hydroarylsilane) seemed to influence strongly on the photopolymerizaiton of olefinic monomers as both chain initiation and chain transfer agents. For the photohomopolymerization and photocopolymerization of MA and AA, the similar trends were observed. Benzoin silyl ethers and thianthrene cation radical also exhibit the photoinitiating ability in the photopolymerization of MMA.

• 대한화학회지
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• 제40권5호
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• pp.347-356
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• 1996

트리플산에 의한 phenylsilane 의 선태적 분해반응에서는 silyltriflate ester 결합을 형성하였다. 1 혹은 2당량배의 트리플산에 의한 $Ph_3SiH$과 carbosilane 고분자$(Ph_2SiCH_2CH_2CH_2)n$의 Ph기 치환반응에서는 1 혹은 2치환 silyltriflate ester 결합을 형성하였으며 이들과 allylmagnesium bromide와의 반응에 의해 이에 상응되는 화합물을 높은 수율로 얻었다. Carbosilane 고분자의 나무가지꼴 실란거대분자를 allylation 과 hydrosilation법에 의해 제3세대(G3)까지 합성하였다.