Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 19, Issue 40, Pages 13504-13510Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201301221
Keywords
coordination polymers; gadolinium; magnetic properties; magnetocaloric effect; succinate
Categories
Funding
- 973 Project [2012CB821704]
- NSFC [91122032, 21121061, J1103305]
- Slovak Research and Development Agency [APVV 013211]
- program of Czech Research Infrastructures [LM2011025]
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Two kinds of inorganic gadolinium(III)-hydroxy ladders, [2xn] and [3xn], were successfully trapped in succinate (suc) coordination polymers, [Gd-2(OH)(2)(suc)(2)(H2O)](n) 2nH(2)O (1) and [Gd-6(OH)(8)(suc)(5)(H2O)(2)](n)4nH(2)O (2), respectively. Such coordination polymers could be regarded as alternating inorganic-organic hybrid materials with relatively high density. Magnetic and heat capacity studies reveal a large cryogenic magnetocaloric effect (MCE) in both compounds, namely (H=70kG) 42.8Jkg(-1)K(-1) for complex 1 and 48.0Jkg(-1)K(-1) for complex 2. The effect of the high density is evident, which gives very large volumetric MCEs up to 120 and 144mJcm(-3)K(-1) for complexes 1 and 2, respectively.
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