有机化学 ›› 2013, Vol. 33 ›› Issue (08): 1828-1833.DOI: 10.6023/cjoc201212041 上一篇    下一篇

研究简报

6-苯并咪唑基-2-芳亚胺乙基吡啶锌配合物的合成及其对苯乙烯聚合的催化性能

肖立伟, 景学敏, 孔洁   

  1. 廊坊师范学院化学与材料科学学院 廊坊 065000
  • 收稿日期:2012-12-24 修回日期:2013-02-25 发布日期:2013-04-07
  • 通讯作者: 肖立伟 E-mail:xiaoliwei2000@sina.com
  • 基金资助:

    河北省自然科学基金(Nos. B2013408014, B2012408006)和廊坊师范学院博士基金(No. LSEB201103)资助项目.

Synthesis and Catalytic Behaviors toward Styrene Polymerization of Zinc Complexes Bearing 6-Benzimidazolyl-2-aryliminoethyl Pyridine

Xiao Liwei, Jing Xuemin, Kong jie   

  1. Faculty of Chemistry and Material Science, Langfang Teachers College, Langfang 065000
  • Received:2012-12-24 Revised:2013-02-25 Published:2013-04-07
  • Supported by:

    Project supported by the Natural Science Foundation of Hebei Province (Nos. B2013408014, B2012408006) and the Doctoral Foundation of Langfang Teacher’s College (No. LSEB201103).

合成了三种不同取代的6-苯并咪唑基-2-芳亚胺乙基吡啶化合物3a3c及相应的锌配合物6-苯并咪唑基-2-芳亚胺乙基吡啶氯化锌4a4c, 产物经过核磁共振、红外光谱及元素分析等方法进行了表征, 其中配合物4a的分子结构得到X射线单晶衍射的进一步确证. 4a的晶胞参数为a=9.2524(17) Å, b=16.958(3) Å, c=16.661(3) Å, β=103.089(3)°, 属于单斜晶系, P2(1)/n空间群. 所得锌配合物对苯乙烯聚合具有中等催化活性, 探讨了影响催化活性的各种因素, 活性最高可达1.33×105 g·mol-1(Zn)·h-1. 采用凝胶渗透色谱、核磁共振谱、红外光谱、X射线粉末衍射等表征了所得聚苯乙烯的相对分子量(Mn)为1~2万, 分子量分布较窄(Mw/Mn<1.8), 属于无规聚苯乙烯.

关键词: 苯并咪唑类化合物, 锌配合物, 催化, 苯乙烯聚合

Three substituted 6-benzimidazolyl-2-aryliminoethyl pyridine derivatives 3a3c and the corresponding zinc complexes 6-benzimidazolyl-2-aryliminoethyl pyridine zinc dichlorides 4a4c were synthesized. The products were evidenced by NMR, IR, elemental analysis and molecular structures of complex 4a has been characterized by X-ray diffraction. The unit cell parameters was a=9.2524(17) Å, b=16.958(3) Å, c=16.661(3) Å, β=103.089(3)°, monoclinic, P2(1)/n space group. The zinc complexes exhibited moderate catalytic activities for styrene polymerization. Influencing factors for catalytic activities were investigated and the highest activities reached 1.33×105 g·mol-1(Zn)·h-1. Characterized with GPC, NMR, IR and XRD, the obtained polystyrene was in atactic microstructure, moderate molecular weight (Mn, 1×104~2×104) and narrow molecular weight distrbution (Mw/Mn<1.8).

Key words: benzoimidazole derivative, zinc complex, catalysis, styrene polymerization