Anion-Templated Formation of Supramolecular Multinuclear Assemblies

作者：Wezenberg Sander J; Escudero Adan Eduardo C; Benet Buchholz Jordi; Kleij Arjan W^*

来源：Chemistry - A European Journal, 2009, 15(23): 5695-5700.

DOI：10.1002/chem.200900528

• anions
• N,O ligands
• self-assembly
• template-directed synthesis
• zinc

The use of anions as supramolecular building motifs is reported herein. The interaction of various anions with [Zn(salphen)] complexes (salphen-NM-phenylenebis(salicylideneimine)) has been studied, with a particular focus on assembly formation in the presence of acetate anions. Strong association of the latter with the Zn metal centre of the salphen complex was quantified by UV/Vis titration studies. The [Zn(salphen)]-OAc assemblies were further characterized by NMR spectroscopy and X-ray analysis and revealed that the acetate anions can function as bridging modules between two [Zn(salphen)] units. The binding strength of a second complex to the acetate anion may be regulated by the substitution pattern of the salphen ligand. The anion-templated assembly formation was further demonstrated by the supramolecular synthesis of a trinuclear Zn(3) assembly. These results hold promise for the directed assembly formation of [Zn (salphen)] complexes with biologically relevant carboxylates, such as amino acids, and potentially new bio-sensing materials.

• 出版日期2009