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A 2D Zinc Coordination Polymer Built from the Mono‐deprotonated 4,4′‐Azobis(3,5‐dimethyl‐1H‐pyrazole) Ligand
Author(s) -
Millan Simon,
GilHernández Beatriz,
Hastürk Emrah,
Schmitz Alexa,
Janiak Christoph
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800286
Subject(s) - pyrazole , deprotonation , chemistry , zinc , molecule , ligand (biochemistry) , solvent , desorption , adsorption , ethanol , hydrogen bond , coordination polymer , crystallography , polymer , medicinal chemistry , inorganic chemistry , polymer chemistry , organic chemistry , ion , biochemistry , receptor
4,4′‐Azobis(3,5‐dimethyl‐1H‐pyrazole) (H 2 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)NO 3 ] · 1.25DMF with sql ‐ a topology, constituted by the dinuclear {Zn 2 (μ‐pz) 2 (Hpz) 2 } 2+ secondary building unit. The μ 3 ‐ 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)NO 3 ] 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.