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Structure and Magnetocaloric Effect of Two Kinds of Ln–Mn II Heterometallic Coordination Polymers Produced by Fractional Crystallization
Two series of Ln–Mn II heterometallic coordination polymers (HCPs), [Ln 8 Mn 3 (µ 3 ‐OH) 8 (IN) 14 Cl 6 (H 2 O) 16 ] n (OH) 2 n · 5 n DMF · 8 n H 2 O {Ln = Gd ( 1 ); Ln = Dy ( 2 )} and [Ln 2 Mn(IN) 6 Cl 2 (H 2 O) 4 ] n · 2 n DMF {Ln = Gd ( 3 ); Ln = Dy ( 4 ), IN = isonicotinic cation}, were synthesi...
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| Published in: | European journal of inorganic chemistry 2016-08, Vol.2016 (24), p.3969-3977 |
|---|---|
| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | Two series of Ln–Mn
II
heterometallic coordination polymers (HCPs), [Ln
8
Mn
3
(µ
3
‐OH)
8
(IN)
14
Cl
6
(H
2
O)
16
]
n
(OH)
2
n
·
5
n
DMF
·
8
n
H
2
O {Ln = Gd (
1
); Ln = Dy (
2
)} and [Ln
2
Mn(IN)
6
Cl
2
(H
2
O)
4
]
n
·
2
n
DMF {Ln = Gd (
3
); Ln = Dy (
4
), IN = isonicotinic cation}, were synthesized by using fractional crystallization and structurally characterized. Polymers
1
and
2
are isostructural and form a 2D double layer of [Ln
4
(µ
3
‐OH)
4
] cubane and Mn(IN)
4
Cl
2
units, whereas
3
and
4
are isomorphic and form a four‐connected
cds
‐type 3D framework assembled from paddle‐wheel binuclear Ln
2
(COO)
4
units and planar Mn(IN)
4
Cl
2
units. Polymers
1
–
4
exhibited large magnetic entropy changes of 42.0, 16.7, 31.5, and 16.6 J kg
–1
K
–1
, respectively (Δ
H
= 7 T). In addition, compounds
2
and
4
displayed field‐induced slow magnetic relaxation behavior. |
|---|---|
| ISSN: | 1434-1948 1099-0682 |
| DOI: | 10.1002/ejic.201600302 |