在相同的反应条件下,基于配体(Hpypymba=4-((3-(吡嗪-2-基)-1H-吡唑-1-基)甲基)苯甲酸)和过渡金属离子(Co(Ⅱ)、Cd(Ⅱ))合成同构金属掺杂材料[CoxCd1-x(pypymba)2]n(0≤x≤1)(配合物1~5),运用粉末X射线衍射(PXRD)、紫外等分析手段对其结构与形貌进行表征.将得到的MOFs作为催化剂载体负载Ag离子进行4-硝基苯酚的还原反应.研究表明含Co2+的化合物1是良好的催化剂载体,随着配合物中Cd2+比例的增加,反应速率下降,甚至对反应有一定的抑制效果.该MOFs对于Ag的最大负载量为47%(w/w),Ag@compound 1经4次循环后依然有96%的催化效率.
In the same reaction conditions,the isotactic metal-doped [CoxCd1-x(pypymba)2]n (0 ≤x ≤ 1) (compounds 1~5) were synthesized based on ligand (Hpypymba=4-((3-(pyrazin-2-yl)-1H-pyrazol-1-yl)-methyl)benzoic acid) and a transition metal ion (Co(Ⅱ),Cd(Ⅱ)).The structure and morphology were characterized by powder X-ray diffraction (PXRD) and UV-visible scanning.The obtained MOFs were used as a catalyst carrier to carry Ag ions to carry out a reduction reaction of 4-nitrophenol.The results showed that the Compound 1 which contained Co2+ was the better catalyst carrier.As the proportion of Cd2+ in compounds increased,the reaction rate decreased,and even the reaction has a certain inhibitory effect.The maximum loading of the MOFs for Ag was 47%(w/w),and 96% of the catalytic efficiency after 4 cycles.