Syntheses, structures and properties of two Keggin polyoxometalates [H5PCo(4,4′-bipy)Mo11O39][H3PMo12O40]·3.75(4,4′-bipy)·1.5H2O and [H3PMo12O40]·2(4,4′-bipy)·1.5H2O

Hybrid Organic−Inorganic Polyoxometalate Compounds: From Structural Diversity to Applications

“…The crystal structures of three monovacant silicotungstate derivatives have been reported: (i) [SiW 11 O 39 Ru III (dmso)] 5− , isolated by heating the aquo derivative with a large excess of dmso, (ii) [SiW 11 O 39 M II (im)] 6− (M = Mn, Co; im = imidazole), cocrystallizing with the aquo derivative, and (iii) [SiW 11 O 39 Co II (4,4′-bpy)] 6− . Hydrothermal conditions have also been used to crystallize insoluble salts with [PW 11 O 39 Co II (pbpy)] 5− (pbpy =5-phenyl-2-(4-pyridinyl)pyridine) or [PMo 11 O 39 Co II (4,4′-bipy)] 5− POMs . The Keggin-type organoimido derivative [PW 11 O 39 {Re V NC 6 H 5 }] 4− and the ruthenium−phosphiniminato derivative [PW 11 O 39 {Ru V NPPh 3 }] 3− have also been characterized.…”

Monolacunary Germanomolybdates Binding with Transition‐Metal Ions (CoII, NiII, and MnII) in Aqueous Solution: Synthesis, Crystal Structures, and Magnetic Properties

“…They are very active towards substitution in which one or more of the addend ions can be substituted by other transition‐metal ions. By virtue of their multiple coordination requirements and stronger oxophilicity, transition‐metal cations can be incorporated into monolacunary heteropolymolybdates to form new classes of materials with unique functions, such as magnetic and catalytic properties 8–11. During the last few years, a growing number of polyoxometalates composed of monovacant Keggin heteropolytungstates and transition metals have been extensively studied 12–14.…”

Hydrothermal synthesis and crystal structure of a 1D fourfold-chain polyoxometalate-based complex [Cu(4,4′-bipy)]2[SiW12O40{Cu(4,4′-bipy)}4]·(OH)2·H2O

“…Since the first Keggin heteropolyanion-supported TM complex [Ni(2,2 0 -bipy) 3 [12] has been reported, a large number of efforts have been given to this field [13]. Up to date, several Keggin structure supported zero dimensional compounds have been reported [14][15][16][17], but the one dimensional chainlike compounds are still limited. Owing to the deficient charge density on the surface oxygen atoms of many Keggin-type POMs, the number of transition metal complexes that are supported on this kind of POMs rarely exceeds two or more [18] to four copper-bipy complex fragments [Cu(4,4 0 -bipy)] + by way of W-Ot-Cu bridges.…”