Coordination architectures and luminescent properties of 5-(pyrimidyl)tetrazolate (Hpmtz) with group 2 metal ions

Abstract

Four alkaline earth metal-organic frameworks, [Mg(H 2 , were synthesized and characterized by elemental analysis, IR spectroscopy, and X-ray crystallography. The crystal structures reveal that 1-3 are mononuclear while 4 displays a 2-D layer structure by bis(bidentate) bridging pmtz À . The luminescence properties of 1-4 were investigated in the solid state at room temperature.

Transformation of Mononuclear Plutonium(III) Tetrazolate Complexes into Dinuclear Complexes in the Solid State

“…Based on parallels between the ionic radii of nine-coordinate Pu III (1.165 ± 0.002 Å) and Nd III (1.163 Å) that are within error of one another, , one could use tetrazoles to delineate potential bonding differences between these cations. − To this end, we compare the solid-state chemistry and spectroscopy of two Pu III tetrazolate compounds with their isotypic Nd III complexes, as well to the other reported isotypic Ln III tetrazolate complexes, such as [Nd­(H 2 ibt)­(H 2 O) 7 ]­(H 2 ibt) 2 ·4­(H 2 O), [H 3 ibt = 4,5-bis­(tetrazol-5-yl)­imidazole], and [Nd­(hqt) 3 ]­K 3 [H 2 hqt = 2-(1H-tetrazol-5-yl)­quinoline-8-ol (8-hydroxyquinoline-2-tetrazole)] …”

Selective Crystallization for Green Separations of Lanthanides Using 5-(Pyrimidyl)Tetrazolate

“…Tetrazolate-derived ligands have attracted much attention in recent years because of their rich coordination chemistry that has provided a variety of structure types. − Specifically, 5-(pyrimidyl)­tetrazolate (pmtz) possesses six basic nitrogen atoms that may exhibit a wide diversity of potential coordination modes (as shown in Scheme ), such as [Cd­(pmtz) 2 ] n ,[Cd­(pmtz)­(μ-Cl) 0.5 (μ-N 3 ) 0.5 (H 2 O)] n , [Mg­(H 2 O) 6 ]­(pmtz) 2 , and [Dy 2 (pmtz) 4 (μ-pmtz)­(H 2 O) 6 ]­(pmtz)·6H 2 O. − Even more noteworthy is that pmtz salts are water-soluble. This makes it possible to use water as the solvent for the selective crystallization of lanthanide elements.…”