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Structural Diversity and Dimensionality of Three Cu(II)-dpds-C5O52– Coordination Polymers Controlled by the Coordination Sphere of Cu(II) Centers and the Coordination Modes of C5O52– (dpds = 4,4′-Dipyridyldisulfide)
Three supramolecular architectures, [Cu 2 (dpds) 2 (C 5 O 5 ) 2 (H 2 O) 4 ]·3H 2 O ( 1 ), [Cu(dpds)(C 5 O 5 )]·3H 2 O ( 2 ), and [Cu 2 (dpds) 2 (C 5 O 5 ) 2 ]·9H 2 O·C 2 H 5 OH ( 3 ) (dpds = 4,4′-dipyridyldisulfide and C 5 O 5 2– (croconate) = dianion of 4,5-dihydroxycyclopent-4-ene-1,2,3-trione), h...
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| Published in: | ACS omega 2024-09, Vol.9 (39), p.40920-40931 |
|---|---|
| Main Authors: | , , , , , , , , |
| Format: | Article |
| Language: | English |
| Online Access: | Get full text |
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| Summary: | Three supramolecular
architectures, [Cu
2
(dpds)
2
(C
5
O
5
)
2
(H
2
O)
4
]·3H
2
O (
1
), [Cu(dpds)(C
5
O
5
)]·3H
2
O (
2
), and [Cu
2
(dpds)
2
(C
5
O
5
)
2
]·9H
2
O·C
2
H
5
OH (
3
) (dpds
= 4,4′-dipyridyldisulfide and C
5
O
5
2–
(croconate) = dianion of 4,5-dihydroxycyclopent-4-ene-1,2,3-trione),
have been synthesized and structurally characterized. Compound
1
contains two crystallographically independent Cu(II) ions,
which are both distorted octahedral geometry with elongation along
the croconate- and H
2
O-bound axial positions and bonded
with two N atoms of two dpds, two O atoms of one C
5
O
5
2–
, and two H
2
O molecules. Two
crystallographically independent dpds ligands, both adopting the bis-monodentate
bridging mode, connect two Cu(II) ions to form a one-dimensional zigzag
chain-like coordination polymer. In
2
and
3
, there are two and three crystallographically independent Cu(II)
ions, respectively, which are all distorted octahedral geometries
with elongation along the croconate-bound axial positions six-coordinated
and bonded with two N atoms of two dpds ligands in cis- or/and trans-forms
and four O atoms of two C
5
O
5
2–
ligands. The dpds ligands in
2
and
3
all
adopt the bis-monodentate bridging mode, and the C
5
O
5
2–
ligands act as bridging ligands with
bridging bis-bidentate through three C
5
O
5
2–
oxygen atoms in
2
and bridging bis-bidentate
through four adjacent C
5
O
5
2–
oxygen atoms in
3
, respectively, linking the Cu(II)
ions to generate a two-dimensional layered and a three-dimensional
metal–organic framework, respectively. The structural diversity
and dimensionality observed in
1
–
3
may be attributed to the cis- or/and trans-coordination sphere of
Cu(II) centers with two dpds ligands and the coordination modes of
croconate ligands. Thermal stability and in situ temperature-dependent
structural variations of
1
–
3
have
been verified by thermogravimetric analysis and powder X-ray diffraction
measurements. Compounds
1
and
3
both exhibit
water vapor capture behaviors with hysteresis isotherms. |
|---|---|
| ISSN: | 2470-1343 |
| DOI: | 10.1021/acsomega.4c06176 |