A new series of (bpy)Ni(II) grafted Ni-SBA-15 catalysts was prepared from treating well-defined mesoporous silica SBA-15 (4 nm in diameter) with various concentrations of bpy based ligand (L1) followed by metalation with NiCl₂ for ethylene oligomerization. These new heterogeneous catalysts displayed outstanding catalytic activity depending on the loading density of Ni on SBA-15. In other words, 4 (0.21 wt% of Ni) showed much better intrinsic activity towards butene (IA = 3605 ± 28 mol_Product/mol_Nih) than that of 1 (2.25 wt% of Ni; IA = 911 ± 28 mol_Product/mol_Nih), suggesting that the formation of higher molecular weight side products was successfully inhibited by reducing the local concentration of catalyst on mesoporous silica SBA-15.

制备一系列新的（bpy）Ni（II）接枝的Ni-SBA-15催化剂，方法是使用各种浓度的bpy基配体（L1）处理定义明确的中孔二氧化硅SBA-15（直径4 nm ），然后用NiCl ₂用于乙烯低聚。这些新的非均相催化剂显示出出色的催化活性，这取决于Ni在SBA-15上的负载密度。换句话说，4（Ni的0.21 wt％）对丁烯的固有活性（IA = 3605±28 mol_产品/ mol _Ni h）比1（Ni的2.25 wt％; IA = 911±28 mol_产品）表现出更好的固有活性。/摩尔_镍h），表明通过降低中孔二氧化硅SBA-15上催化剂的局部浓度，成功抑制了较高分子量副产物的形成。