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A Hexameric Cationic Copper(II) Metallacrown as a Pertechnetate and Perrhenate Scavenger
Author(s) -
RodríguezHermida Sabina,
Lago Ana Belén,
PinoCuevas Arantxa,
Hagenbach Adelheid,
CañadillasDelgado Laura,
Carballo Rosa,
Abram Ulrich,
VázquezLópez Ezequiel M.
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201504315
Subject(s) - perrhenate , perchlorate , chemistry , cationic polymerization , copper , inorganic chemistry , tetraphenylborate , aqueous solution , tetrafluoroborate , polymer chemistry , rhenium , ion , organic chemistry , ionic liquid , catalysis
Materials based on the cationic copper(II) hexanuclear 18‐membered metallacrown [18‐MCCuII - N ( 2 ph )‐6] 6+ (2phH=2‐piconyl hydrazide) and tetrafluoroborate, perchlorate, nitrate, sulfate, and perrhenate anions were prepared by an easy method in aqueous medium. Single‐crystal X‐ray characterization of six members of this new family of complexes showed that the anions are attached to the metallacrown by direct coordination to a copper cation or by hydrogen‐bonding interaction with the center of the hexamer. The stable cationic nature of the complexes and their ability to bind different anions allows them to adsorb and immobilize environmentally relevant anions such as MO 4 − (M=Tc, Re). The MO 4 − trapping capacities suggest that these materials would be useful in the treatment of oxoanionic contaminants in water.