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{La(pytza)3(H2O)2·2H2O}n derived from 5-(4-pyridyl)tetrazole-2-acetic acid (Hpytza) has been synthesized by a solvothermal reaction of Hpytza and La(NO3)3·6H2O. In this compound, neighboring La3+ i...

Mononuclear [Ce(pztza)2(H2O)6](pztza)·H2O (1) (pztza = 5-(2-pyrazinyl)tetrazole-2-acetato) has been prepared and characterized by IR, elemental analysis and single-crystal X-ray diffraction. PEG-5000 (poly(ethyleneglycol-5000)) coated [Ce(pztza)2(H2O)6](pztza)·H2O nanoparticles (NPs) can disperse into distilled water. In vitro study on Hela cells shows that Hpztza is nontoxic while [Ce(pztza)2(H2O)6](pztza)·H2O NPs show high toxicity with half-maximal inhibitory concentration (IC50) of 17 μg/mL (1.93 × 10−5 M). In addition, such NPs can inhibit the migration of Hela cells effectively.

Reaction of 5-[N-acetato(4-pyridyl)]tetrazolate (a4-ptz) potassium salt with lanthanide(III) chlorides, produced three new coordination compounds, [Ln(a4-ptz)2(H2O)4]·Cl·2H2O (Ln = La(1), Eu(2) and Tb(3)). These compounds were characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray diffraction. Complexes 1–3 displayed 1-D structures. Luminescences of 1–3 were investigated at room temperature in the solid state.

Four alkaline earth metal-organic frameworks, [Mg(H2O)6] · (pmtz)2 (1), [Ca(pmtz) 2(H2O)3] · H2O (2), [Sr(pmtz)2(H2O)4] (3), and [Ba(pmtz)2(H2O)2] · 4H2O (4) [pmtz = 5-(pyrimidyl)tetrazole anion], 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−. The luminescence properties of 1–4 were investigated in the solid state at room temperature.

Two yttrium(III) coordination compounds, [Y(a3-ptz)2(H2O)5]Cl · 4H2O (1) and [Y(atza)2(H2O)2(CH3OH)]Cl (2) [a3-ptz = 5-[N-acetato(3-pyridyl)]tetrazole; atza = 5-aminotetrazole-1-acetato], have been synthesized. Single-crystal X-ray diffraction analysis reveals that 1 has a distorted monocapped square-antiprism coordination geometry around YIII. Complex 2 is a distorted pentagonal bipyramid with coordination from four atza ligands, two waters, and one methanol; the coordination of atza in 2 leads to its 1-D polymeric chain structure. 1 and 2 are self-assembled to form 3-D supramolecular structures through hydrogen bonds. The luminescence properties of 1 and Ka3-ptz were investigated at room temperature in the solid state.

A U(VI) mononuclear coordination complex [UO2(a4-ptz)2·(H2O)3] (1) and a Zn(II) 1-D coordination polymer [Zn(a4-ptz)2·(H2O)2]·2H2O (2) have been synthesized with 5-[N-acetato(4-pyridyl)]tetrazolate (a4-ptz) as ligand. Complex 1 has a slightly distorted pentagonal bipyramid around each U center. Complex 2 is octahedral with four a4-ptz and two water ligands. Each Zn center is linked by carboxylate-O(1) and tetrazolate-N(2) of a4-ptz forming a 1-D polymeric chain. Complexes 1 and 2 are self-assembled to form 3-D supramolecular structures through hydrogen bonds. The luminescence properties of 1 and 2 were investigated at room temperature in the solid state. The results suggest that 1 and 2 may be useful as photoactive materials.