A Tellurium-Substituted Heteropolyniobate with Unique π–π Stacking and Ionic Conduction Property

Abstract

A tetratellurium-substituted heteropolyoxoniobate with the formula K2H­[Cu­(phen)­(H2O)]4[Cu­(phen)]2[(LiNb8Te4O40)]·34H2O (1; phen = 1,10-phenanthroline) was hydrothermally prepared and structurally characterized. The compound represents the first hexavalent tellurium-substituted Keggin-type polyoxometalate (POM) so far. What is more, the POM cluster in 1 can elaborately self-assemble into a stable supramolecular framework with an ion conduction property through unique intermolecular π–π stacking.

A Rhombus-Like Tetrameric Vanadoniobate Containing Pseudo-Sandwich-Type {Li ⊂ V2O8(Nb5O14)2} and Its Electrocatalytic Activity for the Selective Oxidation of Benzyl Alcohol

“…The central atoms of POMs play a key role during the assembly process and are commonly from main group elements, late transition metals, and alkali/alkaline earth metal ions. Thereinto, the Li ion is less used as a central atom and the reported cases include {LiNb 8 Te 4 O 40 }, {Li 8 ⊂ Nb 114 O 316 }, and {Li 3 K ⊂ Nb 81 O 225 } . In this work, the central Li + serves as a template cation with an average Li–O length of 2.111 Å and O–Li–O angles ranging from 80.25 to 100.31°.…”

Assembly of a Hexameric Cluster of Polyoxomolybdotriphosphonate Builts from [Zn(H2O){TeMo6O21}{N(CH2PO3)3}]6– Subunits and Its Optical and Catalytic Properties

“…Polyoxometalates (POMs), as anionic transition-metal (e.g., Mo, W, V, Nb, Ta) oxygen-rich clusters, have been investigated not only because of their captivating structural and compositional diversity but also because of their potential applications in spectroscopy, biomedicine, magnetism, materials science, and nanotechnology. − In the last few decades, we have seen the tremendous development of POMs. − It is worth mentioning that organic–inorganic POMs, as a branch of POMs, have attracted much attention because they possess distinct structural characteristics and new properties: for example, as sorbents, ion exchangers, ionic conductors, nonlinear optical materials, sensors, catalysts, and so on. − The organic or organometallic ligands inserted into POM building blocks (such as organotin, carboxylic acid, alkoxy, organosilicon, and organophosphonate) have achieved a dominant position. − Within this field, great effort has been made and considerable attention has been given to organophosphonate-based POM derivatives, which have been developed largely by Zubieta, , Dolbecq, , Kortz, , and Mialane …”

A lanthanide–tellurium heterometal encapsulated sandwich-type heteropolyoxoniobate with a 3D pcu-type hydrogen-bonded network

“…As far as we know, there are no more than seven telluroniobates, [H 2 TeNb 5 O 19 ] 5− , [H 2 Te 2 Nb 24 O 72 ] 14− , [{Cu(phen)} 6 (H 2 O)–(Te 5 Nb 15.5 Cu 0.5 O 57 )] 3.5− , [H 8 SiTe 8 Nb 15 O 64 ] 9− , [LiNb 8 Te 4 O 40 ] 15− , [H 3 Te 15 Nb 21 Cu 3 O 96 ] 18− , and [Te 10 Nb 14 Na 2 (OH) 2 O 61 ] 12− , which were reported by Casey, Niu, and our groups, respectively. 24–29 The incorporation of TeO 3 2− anions into polyoxoniobates has generated novel subunits and various fascinating HPONb architectures.…”

“…8 , which were reported by Casey, Niu, and our groups, respectively. [24][25][26][27][28][29] The incorporation of TeO 34 In 2020, Hu and co-workers reported three types of Ln-containing tellurotungstates, abbreviated as {Ln 2 Te 2 W 34 }, {LnTeW 17 }, and {LnTeW 6 }, respectively. 35 Although researchers have made some progress on lanthanidecontaining tellurotungstate chemistry, lanthanide-incorporated telluroniobates are still in their infancy.…”