Publication Date:
2018-02-07
Description:
A series of 3D d-f heterometallic coordination polymers, {[Ln2Zn(Pzdc)4(H2O)6]*2H2O}n (Ln = La (1), Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), Tb (7), Dy (8), H2Pzdc = 2,3-pyrazine dicarboxylic acid), were synthesized by one-pot reaction under hydrothermal conditions. X-ray crystallographical analysis and powder X-ray diffraction analysis reveal that complexes 1-8 are isostructural and adopt a multi-parallel quadrilateral channel network structure with {4.6^2}2{4^2.6^2.8^2}{6^3}2{6^5.8}2 topology, in which the central Ln(III) ion is nine-coordinated by four oxygen atoms and two nitrogen atoms from four ligands and three oxygen atoms from three coordinated H2O molecules and the central Zn(II) ion is six-coordinated by four oxygen atoms and two nitrogen atoms from four ligands. Moreover, the photophysical properties related to the electronic transition for complexes 4, 5, 7, and 8 were investigated by the excitation and emission spectra as well as the emission lifetimes.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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