Nanosheets of Two-Dimensional Magnetic and Conducting Fe(II)/Fe(III) Mixed-Valence Metal-Organic Frameworks

被引:99
作者
Benmansour, Samia [1 ]
Abherve, Alexandre [1 ]
Gomez-Claramunt, Patricia [1 ]
Valles-Garcia, Cristina [1 ]
Gomez-Garcia, Carlos J. [1 ]
机构
[1] Univ Valencia, Inst Ciencia Mol ICMol, Dept Quim Inorgan, Parque Cient,Catedrat Jose Beltran 2, Paterna Valencia 46980, Spain
关键词
anilato-type ligands; magnetic MOFs; metal-organic frameworks; multifunctional MOFs; nanostructures; ELECTRICAL-CONDUCTIVITY; COORDINATION POLYMERS; 2D; COMPLEXES; TRANSITION; FERROMAGNETISM; NANOMATERIALS; CHLORANILATE; FABRICATION; CHEMISTRY;
D O I
10.1021/acsami.7b08322
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We report the synthesis, magnetic properties, electrical conductivity, and delamination into thin nanosheets of two anilato-based Fe(II)/Fe(III) mixed-valence two-dimensional metal-organic frameworks (MOFs). Compounds [(H3O)(H2O)(phenazine)(3)] [(FeFeIII)-Fe-II(C6O4X2)(3)]center dot 12H(2)O [X = Cl (1) and Br (2)] present a honeycomb layered structure with an eclipsed packing that generates hexagonal channels containing the water molecules. Both compounds show ferrimagnetic ordering at ca. 2 K coexisting with electrical conductivity (with room temperature conductivities of 0.03 and 0.003 S/cm). Changing the X group from Cl to Br leads to a decrease in the ordering temperature and room temperature conductivity that is correlated with the decrease of the electronegativity of X. Despite the ionic charge of the anilato-based layers, these MOFs can be easily delaminated in thin nanosheets with the thickness of a few monolayers.
引用
收藏
页码:26210 / 26218
页数:9
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