Trisubstituted Heteropolytungstates as Soluble Metal-Oxide Analogs. Isolation and Characterization of [(C5Me5)Rh.cntdot.P2W15Nb3O62]7- and [(C6H6)Ru.cntdot.P2W15Nb3O62]7-, Including the First Crystal Structure of a Dawson-Type Polyoxoanion-Supported Organometallic Complex

Keggin POMs Modified by Bonding to Multitrack Cu(bipy) Chains through Linearly Arrayed Terminal and Bridging Oxygen Atoms of the M3O13 Triad

“…[10,11] Transition-metal ions can greatly influence the structural formation of materials. We found that when Cu(NO 3 …”

“…[18] The tetrahedrally coordinated Si is surrounded by four oxygen atoms with Si-O bonds ranging from 1.624 (7) 4-anion, which is similar to the coordination mode of {Cu 3 (4,4Ј-bpy) 3 [19] In this way, each 4,4Ј-bipy ligand links two symmetrical Cu I atoms into a one-dimensional Cu (Figure 3a), which is in the van der Waals interaction range. In this way, an interesting 2D structure is established in the manner of a "zipper" (Figure 3b).…”

“…[3] Recently, a number of Keggin POMs covalently modified by transition-metal complexes have been reported, such as the mixed-valent compounds [{Cu 4 (terpy) 4 4 )}]· 5H 2 O described by Zubieta et al, [4] [PW 12 O 40 ·Ni(2,2-bipy) 2 -(H 2 O)] 3-by Xu et al, [5] and (NH 4 [6] the controlled assembly from lacunary Keggin POMs has also been reported by Pope et al [7] and Gutiérrez-Zorrilla et al [8] All these compounds featured sufficient charge density on the Keggin anion surface atoms to coordinate the transition-metal complexes. It is believed that surface activation is achieved by reducing the metal centres or by replacing metal centre(s) with a high oxidation state by other lower-valence metal(s).…”

“…However, there are only a few examples of fully oxidized Keggin POMs modified by transition-metal complexes. These examples include the unsymmetrical discrete complex [{Cu 2 (O 2 CMe) 2 (5,5-dimethyl-2,2-bipy) 2 }{Cu(5,5Ј-dimethyl-2,2Ј-bipy) 2 }SiW 12 O 40 ], [9] the 1D framework [Ag 3 (2,4Ј-bipy) 3 -PMo 12 O 40 ], [10] the 3D framework complexes [Cu 3 (pz) 3 -(PW 12 O 40 )], [11] [Ag 3 (pz) 3 (PW 12 O 40 )], [11] [Ag(4,4-bipy)](OH)-[{Ag(4,4-bipy)} 2 {PAgW 12 O 40 }], [12] and KH 2 [(-C 5 H 8 NO 2 ) 4 -(H 2 O)Cu 3 ][BW 12 O 40 ]. [13] In the last framework, chirality was designed into the helical motif.…”

Hydrothermal Synthesis and Crystal Structure of Two New α-Keggin Derivatives Decorated by Transition Metal Complexes

“…However, a brandnew advance is the decoration of polyoxoanions with various organic and/or transition metal complex moieties in polyoxometalate chemistry. Such kinds of compounds can be molecularly fine-tuned and provide potentially new types of catalyst systems as well as interesting functional materials with optical, electronic and magnetic properties [9][10][11][12][13][14][15][16][17][18]. In the fields of modified POMs, a number of transition metal coordination complex-linking POMs with zero-, one-, two-and three-dimensional frameworks have been reported.…”