Five compounds based on [TeMo₆O₂₄]⁶⁻ and [β-Mo₈O₂₆]⁴⁻ anions synthesized by using different symmetrical and asymmetric N-donor ligands

Abstract

Five polyoxometalate-based compounds were synthesized under hydrothermal conditions, namely [Cu3(OH)4(Ptla)2(H4TeMo6O24)]·3H2O (1), [Cu2(talm)2(H6TeMo6O24)]·6H2O (2), {Cu2(OH)(Ptep)2[H(β-Mo8O26)]}·2H2O (3), [Cu(bimeb)(H2O)2][(β-Mo8O26)0.5] (4), [Cu5(OH)2(Ptpi)2(H2O)6][H4(TeMo6O24)2] (5) (Ptla = 2-(3-Pyridin-4-yl-[1,2,4]triazol-4-yl)-ethylamine, talm = Tris(2-aminoethyl)amine, Ptep = 1-[2-(3-Pyridin-4-yl-[1,2,4]triazol-4-yl)-ethyl]-piperazine, bimeb =...

A series of isopolymolybdate–viologen hybrids with photo-, thermo- and electro-chromic properties

“…In the CV curves of compounds 1–4 (20 mV s −1 ), there are four pairs of reversible redox peaks, with the first two pairs (I–I′ and II–II′) corresponding to the redox of Mo (from VI to IV) in the Mo8 units and the last two pairs (III–III′ and IV–IV′) corresponding to the redox of the bipyridine group in viologen ligands. 33,34 The results indicate that both the bipyridine group and the POMs group of compounds 1–4 have electrochemical activities in the redox process (Fig. S24–S27†).…”

Key-to-Lock Halogen Bond-Based Tetragonal Pyramidal Association of Iodonium Cations with the Lacune Rims of Beta-Octamolybdate

“…[34][35][36][37][38][39] ), we [40][41][42][43][44] and other groups [45][46][47] previously employed these species as receptors in the recognition systems. In the chemistry of polyoxomolybdates, the [β-Mo8O26] 4anion is a widely used tecton for chemical engineering and design of new compounds; 38,[48][49][50][51][52][53] it contains two lacunes that can function as "locks" for various electrophilic "keys" (Figure 1A). Particularly, we reported on the employment of beta-octamolybdate anion (Figure 1) as a ligand or "lock" for Ag + , which function as "key".…”

Two New Compounds Based on Bi-Capped Keggin Polyoxoanions and Cu-Bpy Cations Contain Both CuII and CuI Complexes: Synthesis, Characterization and Properties

“…The number of POMs hybrids is also increasing exponentially with the improvement of characterization means and structural analysis techniques. In recent years, the design and synthesis of self-assembled POMs-based hybrid materials formed by combining POMs and transition metal complexes (TMCs) have turned out to be a hot topic in the field of POMs chemistry [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ].…”