Abstract
An unreported inorganic–organic hybrid compound [{Cu2(phen)2(ina)2(H2O)}{Cu(phen)2}(H2P2W18O62)]·10H2O(1) (phen = 1,10-phenanthroline, ina = isonicotinate anion) was hydrothermally synthesized and characterized with elemental analysis, IR spectroscopy, thermal analysis, luminescent spectroscopy, UV/Vis diffuse reflection spectroscopy, magnetic measurement. The crystal structure was determined with X-ray single-crystal diffraction. [Cu(phen)2]2+and [Cu2(phen)2(ina)2(H2O)]2+ units are grafted on the Dawson anion [P2W18O62]6− via the terminal oxygen atoms of two WO6 octahedra. In [Cu2(phen)2(ina)2(H2O)]2+ unit Cu2+ ions displays a square-pyramidal geometry, and in [Cu(phen)2]2+ unit the geometry of Cu2+ ion is more close to triangle bipyramidal geometry including a terminal oxygen atom. Hydrogen bonds exist between the decorated Dawson anions and water molecules. The compound 1 has a narrow band gap of 2.05 eV and strong emission at 437 nm. Variable-temperature magnetic measurement of 1 shows a typical antiferromagnetic interaction in the 2–300 K temperature range.
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