A 2D Zinc Coordination Polymer Built from the Mono‐deprotonated 4, 4′‐Azobis(3, 5‐dimethyl‐1H‐pyrazole) Ligand. Issue 21 (22nd August 2018)

• Record Type: Journal Article
• Authors: Millan, Simon; Gil‐Hernández, Beatriz; Hastürk, Emrah; Schmitz, Alexa; Janiak, Christoph
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 644:Issue 21(2018)
• Page Start: 1311
• Page End: 1316
• Publication Date: 2018-08-22
• Subjects: Coordination polymer -- Bipyrazole -- Zinc -- Pyrazole‐pyrazolate -- Ethanol sorption -- Hysteresis; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201800286
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : 4, 4′‐Azobis(3, 5‐dimethyl‐1H‐pyrazole) (H2 azbpz) in its mono‐deprotonated form as a pyrazole‐pyrazolate ligand was assembled together with zinc(II) into the two‐dimensional coordination polymer [Zn(Hazbpz)NO3 ]· 1.25DMF withsql ‐a topology, constituted by the dinuclear {Zn2 (μ‐pz)2 (Hpz)2 } 2+ secondary building unit. The μ3 ‐ bridging mode of the ligand is in analogy to bridging modes observed for 4‐(4‐pyridyl)pyrazolates ligands. After the removal of the DMF solvent molecules, ethanol can be adsorbed up to a maximum uptake of 276 mg· g –1 at p/p 0 = 0.9 in an S‐shaped adsorption isotherm, corresponding to two ethanol molecules per [Zn(Hazbpz)NO3 ] formula unit. The desorption isotherm reveals that only one EtOH is desorbed until p/p 0 = 0.4 and the other one remains hydrogen‐bonded in the framework until very low pressures. Abstract :