Template Assembly of Metal Aggregates by Imino-Carboxylate Ligands

Abstract

Lanthanide, main group, and transition metal ion templates provide different polynuclear cages from [M(L)] (M=Ni, Mn; (L)2−=CH2[CH2N=C(CH3)COO−]2). Templating with lanthanum results in a 12‐coordinate LaIII ion encapsulated by six [Ni(L)] units, whereas with sodium four Na+ ions are trapped inside a tricapped trigonal prismatic [{Ni(L)}9] cage. With manganese, an octahedrally coordinated MnII ion is surrounded by six [Mn(L)] fragments in a twisted trigonal‐prismatic configuration (see picture).

Crystal structure of (µ2-5-bromoisophthalate-κ2O:O’)bis(2-methyl-4Himidazole- κN)cobalt(II), C16H15BrCoN4O4

“…Metal-organic coordination polymers have attracted considerable attention because of their potential applications as functional materials as well as their structure diversity and intriguing variety of topologies [1,2].The diversity in the framework structures of such materials greatly depends on the metal centers and the structure of thespacer ligands, as well as on the reaction pathway [3]. Although alarge number of polycarboxylate based coordination polymers have been synthesized, systematic investigation of external physical or chemical stimuli effects on the structures of polycarboxylate based coordination polymers remains rare [4][5][6][7].Itisnoteworthy that imidazole and isophthalic acid have been widely used to prepare suchh ybridc omplexes.…”