Successful three-dimensional bimetallic metal organic frameworks with different Cu/Cr ratios have been prepared under solvothermal conditions using chromium nitrate and copper nitrate as a bimetal and 1, 4 benzene dicarboxylic acid as an organic linker. Numerous techniques were used to characterize the resulting samples such as XRD, BET, SEM, TEM, SEM-EDS and FT-IR measurements. Combination of Cu and Cr in the same framework will cause some deformation in the structure and decrease in the surface area and pore size distribution. This decrease may be due to the incorporated copper have higher atomic weight than chromium ion. The acidic properties can be measured by non-aqueous titration. The catalytic performance of bimetallic MOFs was confirmed through the synthesis of 3, 4-dihydropyrimidin-2-one and 14-Phenyl-14H-dibenzo [a, j] xanthene. pure Cu-BDC and Cr-MIL-101 possesses a relatively lower surface acidity as well as lower catalytic activity. It surprising that, the combination between copper and chromium in the same framework can significantly enhance the acidity and catalytic activity of the as-synthesized catalysts which may be due to the synergetic effect.

在溶剂热条件下，使用硝酸铬和硝酸铜作为双金属，并用1,4苯二甲酸作为有机连接剂，制备了具有不同Cu / Cr比的成功的三维双金属金属有机骨架。使用多种技术来表征所得样品，例如XRD，BET，SEM，TEM，SEM-EDS和FT-IR测量。在同一框架中结合使用铜和铬会引起结构变形，并减少表面积和孔径分布。这种减少可能是由于引入的铜的原子量比铬离子的原子量高。酸性可以通过非水滴定来测量。通过合成3，4-二氢嘧啶-2-酮和14-苯基-14H-二苯并[a，j]氧杂蒽证实了双金属MOF的催化性能。纯Cu-BDC和Cr-MIL-101具有较低的表面酸度和较低的催化活性。令人惊讶的是，铜和铬在同一框架内的结合可以显着增强合成催化剂的酸度和催化活性，这可能是由于协同作用所致。