Construction of 3D metal–organic frameworks bearing heteropolyoxometalate units and multi-azole molecules and exploration of their photocatalytic activities
Taking advantage of multi-azole molecules as organic linkers, two novel 3D metal–organic frameworks consisting of heteropolyoxometalate building blocks, i.e. , [Cu 5 (1,4-ttb) 4 (CrMo 6 (OH) 6 O 18 )(H 2 O) 8 ]·10H 2 O ( 1 ) and [Cu 4 (1,4-ttb) 4 (SiW 12 O 40 )(H 2 O) 8 ]·4H 2 O ( 2 ) (1,4-ttb = 1-(...
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| Published in | RSC advances Vol. 7; no. 59; pp. 36860 - 36866 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
2017
|
| Online Access | Get full text |
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| Summary: | Taking advantage of multi-azole molecules as organic linkers, two novel 3D metal–organic frameworks consisting of heteropolyoxometalate building blocks,
i.e.
, [Cu
5
(1,4-ttb)
4
(CrMo
6
(OH)
6
O
18
)(H
2
O)
8
]·10H
2
O (
1
) and [Cu
4
(1,4-ttb)
4
(SiW
12
O
40
)(H
2
O)
8
]·4H
2
O (
2
) (1,4-ttb = 1-(tetrazo-5-yl)-4-(triazo-1-yl)benzene) have been fabricated and characterized
via
X-ray single-crystal diffraction, FT-IR spectroscopy, powder X-ray diffraction (PXRD) and TG analyses. Compounds
1
and
2
both possess pillared-layer 3D frameworks which were based on POM units and different Cu–tetrazolate motifs. Compound
1
is a (2,6,6)-connected 3D framework constructed from the 2D networks {Cu
5
(1,4-ttb)
4
(H
2
O)
8
}
n
through connected CrMo
6
polyoxoanions with (3
2
.4
2
.5
2
.6
8
.8)(3
4
.4
4
.5
4
.6
3
) topology. Compound
2
is a (2,3,5)-connected 3D framework constructed from the 2D wave layers {Cu
4
(1,4-ttb)
4
(H
2
O)
8
} through connected SiW
12
polyoxoanions with (4.8
2
)
2
(4
2
.6
4
.8
2
.10
2
)(8) topology. Magnetism studies of compound
1
reveal the dominant antiferromagnetic coupling between the Cu(
ii
) ions. The electrochemistry properties of compound
2
were studied. Intriguingly, compounds
1
and
2
display considerable photocatalytic activities for the degradation of several organic dyes. |
|---|---|
| ISSN: | 2046-2069 2046-2069 |
| DOI: | 10.1039/C7RA05210C |