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Bimodal magneto-luminescent dysprosium (DyIII)-potassium (KI)-oxalate framework: magnetic switchability with high anisotropic barrier and solvent sensing

Mohapatra, Sudip, Rajeswaran, Bharath, Chakraborty, Anindita, Sundaresan, A. and Maji, Tapas Kumar 2013, Bimodal magneto-luminescent dysprosium (DyIII)-potassium (KI)-oxalate framework: magnetic switchability with high anisotropic barrier and solvent sensing, Chemistry of materials, vol. 25, no. 9, pp. 1673-1679, doi: 10.1021/cm400116h.

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Title Bimodal magneto-luminescent dysprosium (DyIII)-potassium (KI)-oxalate framework: magnetic switchability with high anisotropic barrier and solvent sensing
Formatted title Bimodal magneto-luminescent dysprosium (DyIII)-potassium (KI)-oxalate framework: magnetic switchability with high anisotropic barrier and solvent sensing
Author(s) Mohapatra, Sudip
Rajeswaran, Bharath
Chakraborty, Anindita
Sundaresan, A.
Maji, Tapas Kumar
Journal name Chemistry of materials
Volume number 25
Issue number 9
Start page 1673
End page 1679
Total pages 7
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2013-03-24
ISSN 0897-4756
1520-5002
Keyword(s) metal−organic framework
photoluminescence
ferromagnetism
antiferromagnetism
magnetic phase transition
slow magnetic relaxation
sensor
Summary We report synthesis, characterization, and properties of a multifunctional oxalate framework, {KDy(C2O4)2(H2O)4}n (1) (C2O42- = oxalate dianion) composed of two absolutely different metal ions in terms of their size, charge, and electronic configuration. Dehydrated framework (1′) exhibits permanent porosity and interesting solvent (H2O, MeOH, CH3CN, and EtOH) vapor sorption characteristics based on specific interactions with unsaturated alkali metal sites on the pore surface. Compound 1 shows solvent responsive bimodal magnetic and luminescence properties related to the DyIII center. Compound 1 exhibits reversible ferromagnetic to antiferromagnetric phase transition upon dehydration and rehydration, hitherto unknown for any lanthanide based coordination polymer or metal-organic frameworks. Both the compounds 1 and 1′ exhibit slow magnetic relaxation with very high anisotropic barrier (417 ± 9 K for 1 and 418 ± 7 K for 1′) which has been ascribed to the single ion magnetic anisotropy of the DyIII centers. Nevertheless, compound 1 shows a metal based luminescence property in the visible region and H2O molecules exhibit the strongest quenching effect compared to other solvents MeOH, MeCN, and EtOH, evoking 1′ as a potential H2O sensor.
Language eng
DOI 10.1021/cm400116h
Field of Research 030199 Analytical Chemistry not elsewhere classified
030299 Inorganic Chemistry not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30089939

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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