An unprecedented organic–inorganic hybrid based on the first {Nb₁₀V₄O₄₀(OH)₂}¹²⁻clusters and copper cations

Abstract

An unprecedented organic-inorganic hybrid {[Cu(6)L(6)(H(2)O)(3)][Nb(10)V(4)O(40)(OH)(2)]}(2)·13H(2)O (1) (L = 1,10-phenanthroline) containing the unreported {Nb(10)V(4)O(40)(OH)(2)}(12-) building blocks has been successfully synthesized and its photoluminescent properties, IR spectra, thermogravimetric analyses and single-crystal X-ray diffraction were investigated.

A {Co4O4} Cubane Incorporated within a Polyoxoniobate Cluster

“…3 Generally, the synthetic strategy utilized to obtain TM‐containing PONbs has involved choosing a metal that is base‐soluble or protected by chelating ligands 2b. 4 Examples of this interesting type of PONb include copper‐containing derivatives {Cu 24 Nb 56 }5 and {Cu 25.5 Nb 56 },5 {CuNb 11 },1b titanium‐containing derivatives {Ti 12 Nb 6 },6a {TiNb 9 },6b and {Ti 2 Nb 8 },6c and vanadium‐containing derivatives {V 4 Nb 6 },4a {V 4 Nb 10 },7a {V 3 Nb 12 },4c, 7b {PV 2 Nb 12 },7c {V 8 Nb 8 },7d {PV 6 Nb 12 },7e and {VNb 14 } 7f. Some other TM‐containing PONbs are also known, such as {MNb 9 } (M=Co, Cr, Mn, Fe, Ni),8a,b {Cr 2 Nb 10 },8c {MnNb 10 },8d {MNb 12 } (M=Co, Mn, Ni),9a,b and {Co 14 Nb 36 } 4b.…”

Two Members of the {X4Nb16O56} Family (X = Ge, Si) Based on [(GeOH)2Ge2Nb16H2O54]12– and [K(GeOH)2Ge2Nb16H3O54]10–

“…Subsequently, the Nyman and Cronin groups have reported many heteropolyoxoniobate compounds, such as K 12 2 ]}·17H 2 O (en = ethylenediamine). [6,[9][10][11][12][13][14][15][16][17] Our group has also recently made a deeper study on the reactivity of polyoxoniobates in acidic solutions and obtained some mixed-addendum heteropolyniobates. [18] Furthermore, Ge IV -containing polyoxometalates have been known for several decades, and most of the published work was based on the Keggin-type germanotungstates [GeW 12 O 40 ] 4-and its lacunary derivatives.…”

High‐dimensional Polyoxoniobates Constructed from Lanthanide‐incorporated High‐nuclear {[Ln(H2O)4]3[Nb24O69(H2O)3]2} Secondary Building Units

“…The characteristic 5 D 0 → 7 F 1 transition is too weak to be observed, because it is forbidden by J selection rules owing to the mixing with excited geometries with opposite parity in the non‐symmetric low crystal field. Generally, the intensity of 5 D 0 → 7 F 2 transition enhances when the configuration symmetry of Eu 3+ ion decreases . While, the impact of configuration symmetry on 5 D 0 → 7 F 1 is negligible.…”

“…For example, some novel organic‐inorganic hybrid high‐dimensional frameworks constructed from various PONb SBUs have been successfully prepared and characterized . Representative examples include 3‐D frameworks [Cu(1,2‐dap) 2 ] 4 [H 2 V 4 Nb 6 O 30 ] ⋅ 16H 2 O, {V(H 2 O) 6 } 0.5 {Co(en) 2 } 4 {SNb 8 VI V 8 V V 1.25 O 45.25 }(OH) 4.25 ⋅ 3H 2 O, {[Cu 6 L 6 (H 2 O) 3 ] [Nb 10 V 4 O 40 (OH) 2 ]} 2 ⋅ 13H 2 O, and [Cu(enMe) 2 ] 4 [PNb 12 O 40 (VO) 6 ](OH) 5 ⋅ 6H 2 O, etc. Notably, the nuclearity of PONb SBUs in above high‐dimensional frameworks is in the range of only six to twelve, and the variety of PONb SBUs is still very limited.…”