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Structural features of selenate based {Mo} keplerate capsules
New nanosized keplerate [{Mo 6 O 21 (H 2 O) 6 } 12 {Mo 2 O 4 (SeO 4 )} 30 ] 72− was prepared by ligand substitution in the corresponding acetate complex in the presence of ammonium selenate. Three novel keplerate-type compounds (NH 4 ) 72 [{Mo 6 O 21 (H 2 O) 6 } 12 {Mo 2 O 4 (SeO 4 )} 30 ]·250H 2 O...
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| Published in: | CrystEngComm 2022-01, Vol.24 (2), p.321-329 |
|---|---|
| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | New nanosized keplerate [{Mo
6
O
21
(H
2
O)
6
}
12
{Mo
2
O
4
(SeO
4
)}
30
]
72−
was prepared by ligand substitution in the corresponding acetate complex in the presence of ammonium selenate. Three novel keplerate-type compounds (NH
4
)
72
[{Mo
6
O
21
(H
2
O)
6
}
12
{Mo
2
O
4
(SeO
4
)}
30
]·250H
2
O (
2
), [C(NH
2
)
3
]
72
[{Mo
6
O
21
(H
2
O)
6
}
12
{Mo
2
O
4
(SeO
4
)}
30
]·250H
2
O (
3
) and (NH
4
)
36
(NMe
2
H
2
)
36
[{Mo
6
O
21
(H
2
O)
6
}
12
{Mo
2
O
4
(SeO
4
)}
30
]·250H
2
O (
4
) have been isolated and characterized by single crystal X-ray diffraction (SCXRD). The detailed structural analysis revealed the presence of the inverted {Mo
6
O
21
(H
2
O)
6
} pentagonal building blocks in all structures. The pore blocking effect
via
coordination of guanidinium cations was demonstrated by
77
Se NMR and UV-vis spectroscopy in solution and by X-ray analysis in the structure of
3
. All compounds were characterized by IR and Raman spectroscopy and elemental analysis.
A new structural feature and significant stabilizing effect were found for keplerate-type nanospherical polyoxometalates. |
|---|---|
| ISSN: | 1466-8033 1466-8033 |
| DOI: | 10.1039/d1ce01121a |