Dithallium(III)-Containing 30-Tungsto-4-phosphate, [Tl₂Na₂(H₂O)₂(P₂W₁₅O₅₆)₂]^16–: Synthesis, Structural Characterization, and Biological Studies

Abstract

Here we report on the synthesis and structural characterization of the dithallium(III)-containing 30-tungsto -4-phosphate [TlNa(HO){PWO}] (1) by a multitude of solid-state and solution techniques. Polyanion 1 comprises two octahedrally coordinated Tl ions sandwiched between two trilacunary {PW} Wells-Dawson fragments and represents only the second structurally characterized, discrete thallium-containing polyoxometalate to date. The two outer positions of the central rhombus are occupied by sodium ions. The title polyanion is solution-stable as shown by P andTl NMR. This was also supported by Tl NMR spectra simulations including several spin systems of isotopologues with half-spin nuclei (Tl, Tl,P, W).Na NMR showed a time-averaged signal of the Na counter cations and the structurally bonded Na ions. Tl NMR spectra also showed a minor signal tentatively attributed to the trithallium-containing derivative [TlNa(HO)(PWO)], which could also be identified in the solid state by single-crystal X-ray diffraction. The bioactivity of polyanion 1 was also tested against bacteria and Leishmania.

Indium in Polyoxopalladate(II) Chemistry: Synthesis of All-Acetate-Capped [InPd12O8(OAc)16]5– and Controlled Transformation to Phosphate-Capped Double-Cube and Monocube

“…The results were calculated by a nonlinear parameter fitting using TopSpin 3.2 software. Typical parameters used were TD = 4 K, p1 = 17.0 μs (90°), and d1 = 0.02 s. The 31 P 2D DOSY experiments and data evaluation were performed as described in our recent paper . The IR spectra of K-InPd 12 Ac 16 , Na-In 2 Pd 23 P 13 , and Na-InPd 12 P 8 were recorded on KBr disks using a Nicolet-Avatar 370 spectrometer between 400 and 4000 cm –1 .…”

“…Typical parameters used were TD = 4 K, p1 = 17.0 μs (90°), and d1 = 0.02 s. The 31 P 2D DOSY experiments and data evaluation were performed as described in our recent paper. 7 The IR spectra of K-InPd 12 Ac 16 , Na-In 2 Pd 23 P 13 , and Na-InPd 12 P 8 were recorded on KBr disks using a Nicolet-Avatar 370 spectrometer between 400 and 4000 cm −1 . Elemental analyses on Na-In 2 Pd 23 P 13 and Na-InPd 12 P 8 were performed by Crealins, Villeurbanne, France and for K-InPd 12 Ac 16 at Debrecen University, Hungary.…”

Lanthanide Squarate Complexes Containing Mono- and Trivalent Thallium

“…Additionally, the reduction potential for Tl 3+ is dependent on both the pH and the complexing ligands . While structures containing trivalent thallium are knownsuch as some polyoxometalates (POMs), , superconductors, perovskites, , and a few standalone structures − they are overshadowed by their monovalent counterparts. The chemistry of monovalent thallium most closely resembles that of the later alkaline metals and silver due to its similar ionic radius (1.54 vs 1.44, 1.58, and 1.27 Å for K + , Rb + , and Ag + , respectively) .…”

Application of polyoxometalates in photocatalytic degradation of organic pollutants

“…[40] Apart from the structural diversity and convenient synthesis methods, POMs with excellent physicalchemical properties have broad applications in photo-/electrocatalysis, pharmacy, magnetism, and energy storage/conversion. [41][42][43][44] In recent studies, POMs are regarded as promising candidates for the efficiently photocatalytic degradation of organic pollutants because of their semiconductor-like properties. [45][46][47][48] .…”