Synthesis of a Heterometallic [Zn2Ca] Pinwheel Array Stabilized by Amide-Amide Synthons

The rational design of heterometallic compounds bearing s-block metal ions have been a difficult task for chemists owing to their lack preferential geometries. However, some strategies, such as the coordinating pockets with different sizes and/or donor atoms, offered great results. In this work, strategy has tested using Ca(II) an ion and compound previously obtained by our group formula [Zn3(μ-ACA)6(4-phpy)2], which contains tetrahedral N,O- octahedral O-coordinating model structure. From corresponding [Zn2Ca(μ-ACA)6(4-phpy)2]·EtOH (1) successfully synthesized, fully characterized, its crystal structure elucidated. Furthermore, we compiled all structures containing [Zn2M] pinwheel secondary building units (SBUs), where M stands ion, observed tendencies, well promising applications template SBUs preparation 1D–3D coordination polymers, discussed. Finally, solid-state UV-Vis photoluminescence recorded compared homometallic [Zn3(μ-ACA)6(4-phpy)2] compound.