Tab. 14.1.
The nanocosmos of molybdenum oxide clusters formulated
according to metal-based building blocks especially {(Mo)Mo 5
}. This important unit
which is found in all molybdenum-based nanoarchitectures (Figure
14.3), has a pentagonal {MoO 7
} bipyramid in the centre while the Mo atoms in all other
building blocks, like {Mo 1
} or {Mo 2
}, have Mo in an octahedral environment. Building blocks,
like {Mo 1
}, can show different ligand dispositions. (References
are based mainly on our earlier reviews.)
Cluster Figure Formulation Based
on Largest
Building Blocks
Smaller Building Blocks of the
Larger Groups
Associated Counterions/Ligands References
{Mo 36
} –
{Mo 17
} 2
{Mo 1
} 2
{Mo 17
}
¼ {(Mo)Mo 5
} 2
{Mo 1
} 5
**
7
{Mo 57
M 6
} 14.1 {Mo 17
} 3
{Mo 2
} 3
M 6
(M
¼ Fe
III
, V
IV
) { M o 17
}
¼ {(Mo)Mo 5
} 2
{Mo 1
} 5
**
3a
{Mo 63
M 6
} –
{Mo 17
} 3
{Mo 2
} 3
{Mo 1
} 6
M 6
* {
M
o 17
}
¼ {(Mo)Mo 5
} 2
{Mo 1
} 5
**
3a
{Mo 146
} 14.8 {Mo 8
} 16
{Mo 2
} 9
{Mo 8
}
¼ {(Mo)Mo 5
}{Mo 1
} 2
16 SO 4
2À
, 16 K
þ
10
{Mo 154
} –
{Mo 8
} 14
{Mo 2
} 14
{Mo 1
} 14
{Mo 8
}
¼ {(Mo)Mo 5
}{Mo 1
} 2
3a, 3b, 6
{Mo 176
} 14.4 {Mo 8
} 16
{Mo 2
} 16
{Mo 1
} 16
{Mo 8
}
¼ {(Mo)Mo 5
}{Mo 1
} 2
3a, 6
{Mo 248
} 14.9 {Mo 8
} 16
{Mo 2
} 16
{Mo 1
} 16
{Mo 36
} 2
{Mo 36
}
¼ {Mo 8
} 2
{Mo 8
}
0
2
{Mo 2
} 2
3a, 12a
{Mo 75
V 20
} –
{(Mo)Mo 5
} 10
{Mo 5
} 2
{Mo 5=2
} 2
V 20
{Mo 5=2
}
¼ 5{Mo x
} (x
¼ 0:2–0.8) 10 SO 4
2À
, 10 Na
þ
3a
{Mo 102
} –
{(Mo)Mo 5
} 12
{Mo 1
} 30
12 CH 3
COO
À
***
{Mo 132
} 14.2 {(Mo)Mo 5
} 12
{Mo 2
} 30
30 CH 3
COO
À
3a
{Mo 72
M 30
} 14.2, 14.11 {(Mo)Mo 5
} 12
M 30
(for example with
M
¼ Fe
III
)
12 CH 3
COO
À
3a, 14
{Mo 368
} 14.5 {(Mo)Mo 5
}
0
8
{(Mo)Mo 5
}
00
32
{Mo 2
}
0
16
{Mo 2
}
00
8
{Mo 2
}
000
8
{Mo 1
} 64
48 SO 4
2À
4
* Exist with different metal centres.
** Other possible tilings: {Mo 17
}
¼ {Mo 8
} 2
{Mo 1
} and
{Mo 8
}
¼ {(Mo)Mo 5
}{Mo 1
} 2
.
*** A. Mu
¨ller, S. Q. N. Shah, H. Bo
¨gge et al., Thirty Electrons
‘‘Trapped’’ in a Spherical Matrix: A Molybdenum
Oxide-Based
Nanostructured Keplerate Reduced by 36 Electrons,
Angew. Chem. Int.
Ed. Engl.
2000,
39, 1614–1616.
14.2 Sizes, Shapes, and Complexity of Nano-objects are Determined by the Nature 455