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Rational Construction of Polymeric Cadmium(II) Benzimidazole for Transition Metal Ion Exchange
Author(s) -
Xiao Bo,
Li QianQian,
Wang YuTing,
Liu ChunSen,
Hu Min,
Fang ShaoMing
Publication year - 2011
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.201000190
Subject(s) - aqueous solution , ionic bonding , benzimidazole , ion exchange , chemistry , thermal stability , inorganic chemistry , perchlorate , metal ions in aqueous solution , qualitative inorganic analysis , ion , ionic radius , metal , cadmium , organic chemistry
Abstract A 1D double‐helical coordination polymer {[Cd(pbbm) 2 ] 2 (ClO 4 ) 4 (H 2 O) 2 } n ( 1 ) was successfully constructed by the reaction of Cd(ClO 4 ) 2 · 6H 2 O with 1,1′‐(1,5‐pentanediyl)bis‐1 H ‐benzimidazole (pbbm). Interestingly, polymer 1 exhibits highly selective capacity for the ionic exchange of Zn 2+ and Cu 2+ over Co 2+ and Ni 2+ ions in the crystalline solid state when the crystals of 1 are immersed in the aqueous solutions of the perchlorate salts of Cu 2+ , Zn 2+ , Co 2+ , and Ni 2+ ions, respectively, which indicates that central Cd II ion exchange might be considered as being dominated by the coordination ability of metal ions to free functional groups, ionic radii of exchanged metal ions, and the solution concentration of adsorbed metal salts. The parent material‐ and ion‐exchange‐induced products are identified by FT‐IR spectroscopy, PXRD patterns as well as SEM and EDS measurements. In addition, the thermal stability of 1 was also investigated.