高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (1): 134.

• 研究论文 • 上一篇    下一篇

β-二亚胺基Ni(Ⅱ)配合物的合成及其催化乙烯聚合研究

高伟1, 母瀛1,2, 李光华3, 刘晓明1, 苏清1, 姚伟1, 冯守华3   

  1. 1. 吉林大学化学学院;
    2. 吉林大学超分子结构与材料教育部重点实验室;
    3. 吉林大学无机合成与制备国家重点实验室,长春 130012
  • 收稿日期:2003-12-10 出版日期:2005-01-10 发布日期:2005-01-10
  • 通讯作者: 母 瀛(1958年出生),男,博士,教授,博士生导师,从事有机和金属有机化合物的合成及催化研究.E-mail:ymu@emai.ljlu.edu.cn E-mail:ymu@emai.ljlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20374023,29734143)资助

Synthesis, Characterization of β-Diketoiminato Ni(Ⅱ) Complexes and Its Catalytic Performance in Polymerization of Ethylene

GAO Wei1, MU Ying1,2, LI Guang-Hua3, LIU Xiao-Ming SU Qing1, YAO Wei1, FENG Shou-Hua1   

  1. 1. College of Chemistry;
    2. Key Laboratory for Supramolecular Structure and Materials of the Ministry of Education;
    3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China
  • Received:2003-12-10 Online:2005-01-10 Published:2005-01-10

摘要: 合成了一系列带有不同取代基的β-二亚胺配体及其Ni(Ⅱ)的配合物.利用核磁共振谱、元素分析和单晶X射线衍射等手段对配体及配合物进行了表征.元素分析和单晶结构分析表明,在相同的实验条件下苯基取代的β-二亚胺配体锂盐与NiCl2反应只能得到双配体化合物1;而2,6-二甲基苯基及2,6-二异丙基苯基取代的配体锂盐与NiCl2反应得二聚的单氯化物2和3,2个Ni原子通过双氯桥连接在一起.配合物2和3经烷基铝活化后催化乙烯聚合可得到高分子量聚乙烯,活性可达到2.0×105gPE/(molcat·h),分子量最高可达到100万以上.

关键词: &beta, -二亚胺, 后过渡金属催化剂, 乙烯聚合

Abstract: A series of β-diketoiminato ligands with different phenyl substituents and their Ni(Ⅱ) complexes were synthesized. The ligands and the Ni(Ⅱ) complexes were characterized by elemental analysis, 1H NMR and X-ray crystallography. The reaction of NiCl2 with lithium salt of the ligand and phenyl substituents in THF gives bis(β-diketoiminato) Ni(Ⅱ) complex 1, while the reactions with lithium salt of the ligand with 2,6-Me2C6H3 or 2,6-iPr2C6H3 substituents produce dimeric β-diketoiminato Ni(Ⅱ) chloride complexes 2 and 3. When activated by AlR3, complexes 2 and 3 exhibit high catalytic activities for ethylene polymerization, and polyethylenes with a high molecular weight were abtained.

Key words: Dikeotiminate, Late transition metal catalyst, Ethylene polymerization

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