A 2-D metal-organic framework of the iron-based 18-metallacrown-6 with N-(methyl-maleamic ester) terminal ligand

An 18-membered complex, [Fe(MMSHZ)(DMF)]6 (1) [MMSHZ = N-(methyl-maleamic ester)acylsalicylhydrazine] was synthesized and structurally characterized. There are not only particular geometry configurations of N-terminal groups which result in the unique shape of the centric cavity, but also inter- and intra-molecular interactions assembling adjacent molecules into 2-D framework in complex 1. Temperature-dependent magnetic susceptibility measurements indicate that this complex exhibits significantly antiferromagnetic coupling among the metal centers.

Graphical abstractAn 18-membered complex, [Fe(MMSHZ)(DMF)]6 (1) [MMSHZ = N-(methyl-maleamic ester)acylsalicylhydrazine] was reported. The complex 1 exhibits not only unique coordination configurations of N-terminal groups resulting in the particular shape of the cavity in complex 1, but also inter- and intra-molecular interactions assembling this complex into the first 2-D framework via intermolecular EF stacking interactions and C–H⋯O hydrogen-bond interactions.Figure optionsDownload full-size imageDownload as PowerPoint slide