Imidazolium Dicarboxylate Based Metal–Organic Frameworks Obtained by Solvo‐Ionothermal Reaction. Issue 32 (22nd October 2015)

• Record Type: Journal Article
• Authors: Farger, Pierre; Guillot, Régis; Leroux, Fabrice; Parizel, Nathalie; Gallart, Mathieu; Gilliot, Pierre; Rogez, Guillaume; Delahaye, Emilie; Rabu, Pierre
• Is Part Of: European journal of inorganic chemistry. Issue 32(2015)
• Page Start: 5342
• Page End: 5350
• Publication Date: 2015-10-22
• Subjects: Metal–organic frameworks -- Luminescence -- Magnetic properties -- NMR spectroscopy; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201500825
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Solvo‐ionothermal reactions were run between cobalt acetate or zinc acetate and 1, 3‐bis(carboxymethyl)imidazolium chloride ([(MimCO2 H)2 ][Cl]). These reactions led to two isostructural metal–organic frameworks (MOFs). These two compounds, [(MimCO2 )2 ]2 Co and [(MimCO2 )2 ]2 Zn, were obtained as single crystals, and their structures were determined by single‐crystal X‐ray diffraction. These two analogs have a 2D framework consisting of the stacking of layers formed by interconnection of rings containing ligands and metal ions. The structural and thermal properties were analyzed by means of ancillary techniques encompassing FTIR, UV/Vis, NMR spectroscopy, and TGA/TDA measurements. In addition, magnetic and EPR spectroscopic measurements on [(MimCO2 )2 ]2 Co showed that the Co 2+ ions are in a high‐spin configuration with a large magnetic anisotropy relying on a rather unusual distorted tetrahedral coordination. The investigation of the optical properties revealed the photoluminescence of [(MimCO2 )2 ]2 Zn. Abstract : The synthesis and characterization of a metal–organic framework (MOF) based on tetrahedral Co 2+ ions and imidazolium dicarboxylate is reported. The Co 2+ MOF is compared to the isostructural Zn 2+ MOF.