|
Abstract
|
In this study, Co‑DAT‐MOF powder was prepared via the solvothermal method using 4, 6‑diamino‑2‑ thiopyrimidine as the organic linker and Co(NO3)2·6H2O. The synthesized catalysts are characterized using XRD, FT‑IR, TGA, SEM, BET, NH3‑TPD, and ICP‑OES techniques. SEM analysis clearly indicated the formation of nanosheet microspheres. NH3‑TPD‑MS was employed as a means of identifying the various strengths of acid sites and their relative abundance in an attempt to explain the effect of the catalyst surface acid sites. We identified a new acidic feature in Co‑DAT‐MOF catalyst, related to the presence of desorption peaks in the NH3‑TPD profiles. The activity of Co‑DAT‐MOF catalyst for the synthesis of multicomponent reactions correlates with lewis acidity. In addition, Co‑DAT‐MOF exhibited excellent performance for the synthesis of pyrroloacridine‑1(2H)‑one and chromeno [2, 3‑ d] pyrimidin‑8‑amines, as well as good reusability and recyclability.
|