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Three new lanthanide-organic frameworks {(Ln(L)(OClO 3 )(H 2 O))·0.5H 2 O} n (Ln=Sm (1), Eu (2), Er (3)) have been prepared by hydrothermal reactions of the corresponding lanthanide oxide (Ln 2 O 3 ), silver perchlorate (AgClO 4 ) and 5-(imidazol-1-ylmethyl)isophthalic acid. The complexes have been characterized by single-crystal and powder X-ray diffraction, IR spectroscopy, and elemental analyses. In 1-3, the metal centers are eight-coordinated to show polyhedral coordination geometries with an LnO 8 donor set. The imidazolyl groups are free of coordination, and the perchlorate and carboxylate groups bridge the Ln 3+ cations leading to the formation of wave-like layer structures containing metal-chains. The fluorescence properties of complex 2 were investigated.
Zeitschrift für Naturforschung B – de Gruyter
Published: Nov 1, 2013
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