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Title: Strategic Capture of the {Nb7} Polyoxometalate

Journal Article · · Chemistry - A European Journal

Abstract Group V Nb‐polyoxometalate (Nb‐POM) chemistry generally lacks the elegant pH‐controlled speciation exhibited by group VI (Mo, W) POM chemistry. Here three Nb‐POM clusters were isolated and structurally characterized; [Nb 14 O 40 (O 2 ) 2 H 3 ] 14− , [((UO 2 )(H 2 O)) 3 Nb 46 (UO 2 ) 2 O 136 H 8 (H 2 O) 4 ] 24− , and [(Nb 7 O 22 H 2 ) 4 (UO 2 ) 7 (H 2 O) 6 ] 22− , that effectively capture the aqueous Nb‐POM species from pH 7 to pH 10. These Nb‐POMs illustrate a reaction pathway for control over speciation that is driven by counter‐cations (Li + ) rather than pH. The two reported heterometallic POMs (with UO 2 2+ moieties) are stabilized by replacing labile H 2 O/HO−Nb=O with very stable O=U=O. The third isolated Nb‐POM features cis ‐yl‐oxos, prior observed only in group VI POM chemistry. Moreover, with these actinide‐heterometal contributions to the burgeoning Nb‐POM family, it now transects all major metal groups of the periodic table.

Research Organization:
Oregon State Univ., Corvallis, OR (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE
Grant/Contract Number:
SC0010802
OSTI ID:
1611515
Alternate ID(s):
OSTI ID: 1542479
Journal Information:
Chemistry - A European Journal, Vol. 25, Issue 45; ISSN 0947-6539
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

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