Synthesis and catalytic application of bimetallic-MOFs in synthesis of new class of phenylnicotinonitriles

Abstract

Today, the development of porous catalysts for catalytic purposes is being targeted. Herein, this goal was pursued by using the porous substrate of the metal–organic frameworks (MOFs). First, MIL-88B(Fe₂/Co)-TPA-Cu(OAc)₂ as a new catalyst containing copper complex based on Fe and Co-based bimetallic-MOFs was synthesized by using back-to-back solvothermal and reflux methods. The structure of the catalyst was investigated and proved using different methods such as FT-IR, XRD, SEM, EDX, Elemental mapping, XPS, BET/BJH and TGA/DTG. The catalytic activity of the target structure was studied in the preparation of new phenylnicotinonitriles. The results of various investigations showed that MIL-88B(Fe₂/Co)-TPA-Cu(OAc)₂ has good activity in the synthesis of phenylnicotinonitriles and performs these reactions in green and mild conditions. The last step of synthesis has proceeded via a cooperative vinylogous anomeric based oxidation. The structure of the synthesized compounds was identified and confirmed using melting point, FT-IR, ¹H-NMR and ¹³C-NMR techniques. The recyclability of the catalyst was also investigated and good results were obtained. The mentioned properties of this prepared catalyst make it a suitable porous catalyst.