Optimization of ligand structure in late transition-metal complexes immobilized into clay mineral interlayer as highly active catalysts for ethylene oligomerization

通过将异亚胺基吡啶铁(III)和α-二亚胺镍(II)络合物固定在粘土矿物层间，如氟四硅云母和蒙脱石中间层，制备了多相乙烯齐聚催化剂。在乙烯齐聚反应中，粘土矿物固载的双(亚氨基)吡啶铁(III)络合物表现出极高的活性，生成了高选择性的线性α-烯烃，可作为润滑油和表面活性剂的原料。同时，在降低多相α-二亚胺镍络合物中配体的空间位阻的同时，产物的相对分子质量也显著降低。此外，我还通过在配体的亚氨基苯基上添加氟原子实现了催化活性的提高。

Heterogeneous ethylene-oligomerization catalysts were developed by immobilizing is(imino)pyridineiron(III) and alfa-diiminenickel(II) complexes into interlayer of clay minerals such as fluorotetrasilicic mica and montmorillonite interlayers. During the ethylene oligomerization, the clay mineral-immobilized bis(imino)pyridineiron(III) complexes showed extremely high activity and produced linear alfa-olefins as useful raw materials of lubricants and surfactants with high selectivity. Meanwhile, on decreasing the steric hindrance of the ligand in heterogeneous alfa-diiminenickel complexes, the molecular weight of the products dramatically decreased. Moreover, I achieved the increase of the catalytic activity by adding fluorine atoms on iminophenyl groups of the ligand.