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3D Coordination Polymer of [HW 7 O 24 ] 5– Stabilized by a Copper(II) Complex and Sodium Cations: Structure, Solid‐State Stability, and Aqueous Solution Behavior
Author(s) -
Wang XinFang,
Cao Jie,
Huang KunLin,
Xu YanQing,
Chi YingNan,
Hu ChangWen
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200810
Subject(s) - chemistry , polyoxometalate , aqueous solution , copper , crystallography , solvation , inorganic chemistry , ligand (biochemistry) , crystal structure , ion , organic chemistry , catalysis , biochemistry , receptor
Compound Na[Cu(en) 2 ] 2 [HW 7 O 24 ] · 5H 2 O ( 1 , en = ethanediamine), as the first example of a heptatungstate polymer, has been synthesized in H 2 O/dmso and characterized by single‐crystal X‐ray diffraction, IR, UV/Vis, and ESI‐MS. The [HW 7 O 24 ] 5– cluster in 1 , as an inorganic hexadentate ligand, coordinates to two Na + and four [Cu(en) 2 ] 2+ cations to construct a 3D extended structure. The solid‐state stability of 1 at room temperature was proven by X‐ray powder diffraction and digital camera techniques. The electrospray mass spectra suggest that most of the [HW 7 O 24 ] 5– dissociates into relatively more stable [W 6 O 19 ] 2– species in aqueous solution because the coordination bonds around the [HW 7 O 24 ] 5– anions are broken by the solvation effect of water on the the copper cation. These results demonstrate that a transition‐metal‐complex cation plays an important role in the isolation and stabilization of a highly charged polyoxometalate anion.