基于不同电子和空间效应的膦配体L1～L4,合成了一系列新型铱配合物Ir-L1～Ir-L4,考察了配体在铱配合物催化水作氢源的氢甲酰化反应中的影响.研究表明,具有较强π-受电子能力的离子型双齿膦配体L4(1J31P-77nSe=781 Hz)修饰的铱配合物可以同时促进水煤气变换反应和烯烃氢甲酰化反应:以Ir-L4配合物为催化剂,1-己烯的转化率高达93％,产物醛(直链醛和支链醛)的收率为93％,1-己烯加氢副产物己烷的收率小于1％,表明水作氢源几乎完全抑制了烯烃加氢副反应.此外,Ir-L4催化体系结合离子液体([MePh3P]Br)还可实现催化剂的回收循环5次.“,”A series of novel Ir-complexes,namely Ir-L1,Ir-L2,Ir-L3 and Ir-L4,where L1～L4 represent phosphine ligands having different electronic and steric effects,were synthesized in this work.Then the effect of the as-synthesized phosphine ligands on the performance of the Ir(Ⅰ)-complexes catalysts was investigated for the hydroformylation reaction using H2O as the hydrogen source.It was found that the Ir-complex modified by the ionic bi-dentate phosphines L4 with a strong π-accepting ability (1J31P-nSe=781 Hz) can effectively promote water gas shift reaction (WGSR) and hydroformylation of olefins at the same time.As a result,a 1-hexene conversion of 93％ was obtained,and the total yields of the target (linear and branched) aldehydes were up to 93％ when using the Ir-L4 catalyst.Meanwhile,the yield of hexane from the hydrogenation of 1-hexene was less than 1％,showing that the side reaction of olefin hydrogenation can be almost completely inhibited when using H2O as the hydrogen source.Moreover,by using the ionic liquid of[MePb3P]Br as the solvent,Ir-L4 catalyst can be efficiently recovered for at least 5 times.