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

通过将亚胺吡啶铁（III）和α -二亚胺镍（II）配合物固定在氟四硅云母和蒙脱土等粘土矿物的夹层中，开发了非均相乙烯低聚催化剂。在乙烯低聚过程中，黏土矿物-固定化双（亚胺）吡啶铁（III）配合物表现出极高的活性，并以高选择性生产出线性α -烯烃作为润滑剂和表面活性剂的有用原料。同时，在非均相α -二亚胺镍配合物中，降低配体的位阻，产物的分子量显著降低。此外，我通过在配体的亚苯基上加入氟原子，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.