有机改性纳米二氧化硅和介孔SBA-15并固载钌配合物的表征与催化加氢性质

Catalytic hydrogenation properties and characterization of ruthenium complexes immobilized on the organic modified nano-SiO2 and mesoporous SBA-15 substrates

过渡金属钌配合物在均相和异相催化中,如加氢和加氢脱硫等方面具有广泛的应用.本研究主要从有机烯烃改性纳米二氧化硅和介孔SBA-15着手,将所合成的含有机硅基团配体的钌配合物有效地固载在改性的可溶性纳米二氧化硅和介孔SBA-15的表面,改性后固载型催化剂在有机相中具有良好的分散性,形成一个均相化的异相催化分子固载中心,并探究了其在烯烃加氢中的催化效果.研究结果表明,有机硅基团改性后的固载型钌催化剂具有较高及较稳定的催化效率,即常规烯烃在0.1 MPa压力下的催化加氢转化率可达到70%,而且具有较好的多次循环使用的绿色催化效果,这在分子催化方面具有非常好的潜在应用前景.

Transition metal ruthenium compounds have a wide range of applications in homogeneous and heterogeneous catalysis such as in hydrogenation and hydrodesulfurization aspects.This research mainly started from organic olefin modified nano-SiO2 and mesoporous SBA-15,and the ruthenium complexes containing ligands with silicone groups could be immobilized effectively on the surface of modified soluble nano-SiO2 and mesoporous SBA-15,which could form an immobilized center of heterogeneous catalytic molecules solid immobilized center.The immobilized catalysts had good solubility in organic phase and the catalytic effect in the hydrogenation of olefins was also investigated.The results showed that the immobilized catalysts containing organic silicon groups had good and stable catalytic activity,and the olefin hydrogenation conversion rate could reach about ca.70%under 0.1 MPa.Furthermore,the immobilized catalysts could be reused many times as the green catalysts,which was very promising in molecular catalysis.