Magnetic Core–Shell Nanoparticles as Carriers for Olefin Dimerization Catalysts
作者:Thomas M. Ruhland、Julian R. V. Lang、Helmut G. Alt、Axel H. E. Müller
DOI:10.1002/ejic.201201547
日期:2013.4.12
We report the covalent support of functionalized nickel complexes on magneticcore–shell hybrid particles γ-Fe2O3/SiO2. Two completely different ways of connecting the particle with these nickel complexes were carried out. The first approach used the hydrosilylation method between the alkene-substituted nickel complex and a silane. In a second approach, the particles were connected with the complexes
我们报告了功能化镍配合物在磁性核壳杂化颗粒 γ-Fe2O3/SiO2 上的共价支持。进行了将颗粒与这些镍配合物连接起来的两种完全不同的方式。第一种方法使用烯烃取代的镍络合物和硅烷之间的氢化硅烷化方法。在第二种方法中,粒子通过点击化学(铜催化的 Huisgen 1,3-偶极环加成)与复合物连接。为此,镍配合物被炔烃部分取代。透射和扫描电子显微镜、能量色散 X 射线衍射和 FTIR 光谱是用来表征镍配合物成功异质化的方法。
CATALYST COMPLEX AND PROCESS FOR PRODUCING MULTIMODAL MOLECULAR WEIGHT POLYOLEFINS
申请人:Palackal Syriac
公开号:US20100168351A1
公开(公告)日:2010-07-01
Multinuclear catalyst complex comprising two or more active metal centres and at least one phenoxyimine compound and at least one substituted cyclopentadienyl, indenyl or fluorenyl derivative, each phenoxyimine compound being bonded to a cyclopentadienyl, indenyl or fluorenyl derivative forming a ligand framework, the cyclopentadienyl, indenyl or fluorenyl derivative being coordinated with one of the metal centres and the phenoxyimine compound being coordinated with an active metal centre other than the metal centre the cyclopentadienyl, indenyl or fluorenyl derivative is coordinated with, and wherein the phenoxyimine compound has the formula
wherein R
1
is hydrogen, alkyl, cycloalkyl, aryl or aralkyl;
R
2
is hydrogen, halogen, alkyl, cycloalkyl, aryl, O-alkyl or aralkyl; and
R
3
is alkyl, cycloalkyl, aryl or aralkyl, process for preparing a multinuclear catalyst composition comprising the steps of bonding a substituted phenoxyimine compound to a substituted cyclopentadienyl, indenyl or fluorenyl derivative to obtain a ligand framework and reacting at least one ligand framework with an active metal component and process for the polymerization of olefins, in particular of ethylene and optionally one or more other a-olefins, wherein said multinuclear catalyst is applied.