Rational Assembly of Three‐component Coordination Polymers as Heterogeneous Catalysts for CO2 Cycloaddition and Cyanosilylation Reactions

Four new coordination polymers based on 5‐(((1 H ‐imidazol‐2‐yl)methyl)amino) isophthalic acid (H 3 L ) and auxiliary ligands (1,10‐phenanthroline, 2,2′‐bipyridine, and 4,4′‐bipyridine), namely, {[Zn(H L )(phen)(H 2 O)] ⋅ 2H 2 O} n ( CP 1 ), {[Ni(H L )(phen)(H 2 O)]} n ( CP 2 ), {[Ni(H L )(2,2′‐bpy)(H 2 O)] ⋅ 2H 2 O} n ( CP 3 ) and {[Cd(H L )(4,4′‐bpy) 0.5 (H 2 O)] ⋅ 2H 2 O} n ( CP 4 ) were rationally assembled. Furthermore, these four CPs were screened as heterogeneous catalysts for CO 2 cycloaddition and cyanosilylation reactions under mild conditions. The catalytic experiments showed that CP 1 had the better catalytic performance, excellent substrate tolerance and recyclability for the above two reactions. It is speculated that the excellent activity of CP 1 may be due to the open Lewis base site and the Lewis acidic characteristics of the zinc (II) center. After five cycles, the catalytic activities of CP 1 did not significantly decrease, and the structures remained unchanged. Therefore, the CP 1 was considered efficient and stable heterogeneous catalysts for above the two reactions.