Metal complexes derived from o-carboranes : synthesis, structures and versatile properties카보레인 함유 금속 착물의 합성, 구조 및 다양한 성질 연구

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dc.contributor.advisorDo, Young-Kyu-
dc.contributor.advisor도영규-
dc.contributor.authorHong, Eun-Kee-
dc.contributor.author홍은기-
dc.date.accessioned2011-12-13T04:28:09Z-
dc.date.available2011-12-13T04:28:09Z-
dc.date.issued1999-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=151516&flag=dissertation-
dc.identifier.urihttp://hdl.handle.net/10203/31507-
dc.description학위논문(박사) - 한국과학기술원 : 화학과, 1999.2, [ xi, 159 p. ]-
dc.description.abstractIn accordance with the recent needs for the development of new type of ancillary ligands particularly in metallocene chemistry, a set of new isopropyl bridged cyclopentadienyl ο-carboranyl ligands $CpHCMe_2CB_{10}H_{10}CR$ (R = H; 1, Me; 2) was prepared and their lithiation property was determined. Reaction systems of mono- or di-lithium salts of 1 and mono-lithiated 2 with group 4 halides or mono-$Cp^*$ Ti halides were investigated, leading to the preparation of several group 4 metal complexes including $rac-M(η^5:η^1-CpHCMe_2CB_{10}H_{10}C)_2$ (M = Ti; 3 Zr; 4, and Hf; 5), $Zr(η^5-CpHCMe_2CB_{10}H_{10}CR)_2$ (R=H; 6, Me; 7), $Zr(η^5:^1-CpHCMe_2CB_{10}H_{10}C)Cl_2$ (8), $Cp^*Ti(η^5-CpCMe_2CB_{10}H_{10}CR)Cl_2$(R = H; 9, Me; 11), $Cp^{*}Ti(η^5: ^1-CpCMe_2CB_{10}H_{10}C)Cl_2$ (10). For a given single crystals of 3, 4, and 5, the X-ray analysis reveals that only one form of racemic conformer exists. The variable temperature $^{11}B{^1H$} NMR Spectra of 4, reveal that this complex goes through the racemization, moving from one racemic conformer to the other by flipping the ligands in THF solution. Complex 4 is active for the polymerization of methyl methacrylate (MMA) without the presence of co-catalyst in THF solution. Complex 4, 6, and 7 with MMAO produced low molecular weight products in ethylene or propylene polymerization. Complex 5 showed photoluminescence (PL) at 420 nm. A new optical analysis system for the detection of mechanoluminescence (ML) determined the wavelength of complex 5 at 435 nm. The electroluminescence (EL) of green light was observed in the complex 5 blended with poly (N-vinylcabazole) (PVH) system. Maximum luminescence of 47 Cd/㎠ was achieved at 30 V at 530 nm. Complex 9 and 11 is active for the polymerization of ethylene and propylene with MMAO in Toluene. In the polymerization of ethylene, these system act like conventional metallocene catalysts, from a point of view of molecular weight(MW) and molecular weight distribution(MWD), and p...eng
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectMechanoluminescence-
dc.subjectCatalyst-
dc.subjectMetallocene-
dc.subjectCarborane-
dc.subjectElectroluminescence-
dc.subject전기발광-
dc.subject역학광-
dc.subject촉매-
dc.subject메탈로센-
dc.subject카보레인-
dc.titleMetal complexes derived from o-carboranes : synthesis, structures and versatile properties-
dc.title.alternative카보레인 함유 금속 착물의 합성, 구조 및 다양한 성질 연구-
dc.typeThesis(Ph.D)-
dc.identifier.CNRN151516/325007-
dc.description.department한국과학기술원 : 화학과, -
dc.identifier.uid000945484-
dc.contributor.localauthorDo, Young-Kyu-
dc.contributor.localauthor도영규-
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