Three rare-earth incorporating 6-peroxotantalo-4-selenates and catalytic activities for imidation reaction

Abstract

Functionalization with belt lanthanide groups allows for crystallization and structural characterization of homometallic selenotantalates, CsK[Ln(H2O)6Se4(TaO2)6(OH)3O18]∙nH2O (Ln = Eu/Gd, n = 14 (STD-Eu, STD-Gd) and Ln = Lu, n = 12...

Recent advances in lanthanide-based POMs for photoluminescent applications

“…notably V V , Mo VI , W VI , Nb V , and Ta V ). [1][2][3][4][5][6] POM materials with abundant structural units and chemical versatility are compellingly appealing [7][8][9][10] and are widely recognized as the preferred choice in functional, magnetism, and catalysis materials. [11][12][13][14][15] Under certain conditions, condensation reactions are triggered between the MO x components, in which the MO x octahedrons are structurally assembled in the form of typically symmetrical assemblies via edge-, corneror face-sharing linkages.…”

Two binuclear Ni-inserted polyoxotantalates based on {NiTa10O32} units with catalytic activity

“…In 1953, the first POTa {Ta 6 O 19 } was reported by Lindqvist, 8 and then, a few other POTas were obtained by Nyman, Casey, Liu, Su, Hu and Zheng's groups, such as {Re(CO) 3 Ta 6 O 19 }, {Mn(CO) 3 Ta 6 O 19 }, 9 {Ta 10 O 28 }, 10 {Ti 2 Ta 8 O 28 }, {Ti 12 Ta 6 O 44 }, 11 {P 8 W 60 Ta 12 (H 2 O) 4 (OH) 8 O 236 }, {P 2 W 15 O 59 (TaO 2 ) 3 }, 12 {Ta 18 P 12 W 90 (OH) 6 (H 2 O) 2 O 360 }, 13 {[Cu(en) 2 ] 4 Ta 6 O 19 }, 14 {[Cu(en) 2 ] 3 [Cu(en)(H 2 O) 2 Cu(en)(Ta 6 O 19 )] 2 }, 15 and {[Cu(cyclam)] 2 Ta 6 O 19 }. 16 Our group has also explored the chemistry of POTas and discovered a series of structurally novel compounds such as {P 4 (TaO 2 ) 6 O 25 }, 17 {Se 4 (TaO 2 ) 6 (OH) 4 O 17 }, 18 {Ln(H 2 O) 6 H 4 (TaO 2 ) 6 As 4 O 24 }, 19 {CoTa 6 O 19 }, {[Co(en)] 2 Ta 12 O 38 }, 20 {Co 8 Ta 24 O 80 }, 21 {Cu 4 (bipy) 6 Ta 6 O 19 }, and {Cu 4 (phen) 6 Ta 6 O 19 }. 22 In these compounds, transition-metal or lanthanide clusters serve as pendants that decorate the surface of the POTas skeleton or act as connectors that bridge POTas units to form large aggregations.…”

Oxalate-assisted assembly of two polyoxotantalate supramolecular frameworks with proton conduction properties

“…13 With this strategy, some transition-metal incorporated and p -block element incorporated POTas have been developed. 14–17 For example, William H. Casey and coworkers have developed two new transition-metal incorporated POTas of [Ti 2 Ta 8 O 28 ] 8− and [Ti 12 Ta 6 O 44 ] 10− by using titanium isopropoxide to react with the tantalate precursor. 14 Besides, a family of brand-new POTas with catalytic activity were obtained when p -block elements including phosphorus, arsenic, and selenium were introduced.…”

“…14 Besides, a family of brand-new POTas with catalytic activity were obtained when p -block elements including phosphorus, arsenic, and selenium were introduced. 15–17 However, it is noteworthy that the use of specific organic molecules to pursue new POTas remains unexplored. Organic ligands have been proven to play a key role in the construction of a variety of POM architectures with typical functions such as templates, 18,19 bridging linkers, 20 chiral centers, 21 and so on.…”