Details

Autor(en) / Beteiligte

• Abramov, Pavel A
• Davletgildeeva, Anastasiia T
• Moroz, Nikolay K
• Kompankov, Nikolay B
• Santiago-Schübel, Beatrix
• Sokolov, Maxim N

Titel

Cation-Dependent Self-assembly of Vanadium Polyoxoniobates

Ist Teil von

• Inorganic chemistry, 2016-12, Vol.55 (24), p.12807-12814

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Reaction of Na7H­[Nb6O19]·15H2O with NaVO3·2H2O at 220 °C in the presence of NaHCO3 gives new bicapped α-Keggin vana­dodo­deca­niobate [VNb12O40­{NbO­(CO3)}2]13–, isolated and structurally characterized as Na9H4­[VNb12O40­{NbO­(CO3)}2]·37H2O (1). According to 51V NMR and ESI-MS data, this anion equilibrates in solution with [VNb12­O40]15– and oligomeric species that result from dissociation of the {NbO­(CO3)}+ fragments. In the presence of potassium, the same reaction gives [V x Nb24­O76] n− (x = 4, n = 12 (2a); x = 3, n = 17 (2b)). The anions with x = 3 and 4 cocrystallize together, but exist as separate entities both in solid and in solution according to 51V MAS NMR and ESI-MS data.