Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2154
Title: A discrete Cu-6(II) cluster and a 3D Mn-II-Cu-II framework based on assembly of Mn2Cu4 clusters: synthesis, structure and magnetic properties
Authors: Chakraborty, Anindita
Escuer, Albert
Ribas, Joan
Maji, Tapas Kumar
Keywords: Chemistry
Single-Molecule Magnet
Copper Inverse-9-Metallacrown-3 Compounds
Crystal-Structures
Magnetostructural Correlations
Partial Transformation
Carboxylate Chemistry
Di-2-Pyridyl Ketone
Spin Frustration
Metal-Complexes
Trinuclear
Issue Date: 2016
Publisher: Royal Society of Chemistry
Citation: Chakraborty, A.; Escuer, A.; Ribas, J.; Maji, T. K., A discrete Cu-6(II) cluster and a 3D Mn-II-Cu-II framework based on assembly of Mn2Cu4 clusters: synthesis, structure and magnetic properties. Dalton Transactions 2016, 45 (39), 15523-15531 http://dx.doi.org/10.1039/c6dt03094g
Dalton Transactions
45
39
Abstract: The synthesis, single-crystal structure characterization and detailed magnetic study of a homometallic hexanuclear Cu-II cluster [Cu-6(mu(3)-OH)(2)(ppk())6(H2O)2(NO3)(4)] (1) and a three-dimensional (3D) compound [{MnCu2(dpkO(2)H)(2)(dpkO(2))N-3}center dot(NO3)center dot H2O](n) (2) (ppk = phenyl-2-pyridyl ketoxime; dpk = di-2-pyridyl ketone) consisting of heterometallic Mn-II-Cu-II hexanuclear cores as secondary building units are reported in this paper. In compound 1, two symmetry-related Cu-3 triangles consisting of a hydroxido-bridged trinuclear unit, [Cu-3(mu(3)-OH)(ppk)(3)(H2O)(NO3)](+), are assembled through nitrate bridging giving rise to the homometallic Cu-6 cluster. Compound 2 contains heterometallic {(Mn2Cu4II)-Cu-II} cores, which are further connected to each other through an azido bridging ligand in all the crystallographic directions, resulting in a 3D metal-organic framework. Construction of such a heterometallic 3D framework from {(Mn2Cu4II)-Cu-II} units is until now, unknown. Magnetic studies of both 1 and 2 were performed in detail and both compounds show dominant antiferromagnetic interaction in the respective clusters. Compound 1 reveals significant spin frustration and anti-symmetric exchange interaction in the trinuclear cores, with a significantly high value of Jav (-655 cm(-1)). Furthermore, compound 2 exhibits a dominant antiferromagnetic interaction, which is also supported by an extensive magneto-structural correlation which considers the different magnetic pathways
Description: Restricted Access
URI: http://hdl.handle.net/10572/2154
ISSN: 1477-9226
Appears in Collections:Research Articles (Tapas Kumar Maji)

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