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A nickel(II)-manganese(II)-azido layered coordination polymer showing a three-dimensional ferrimagnetic order at 35 K

Abstract

The work in this report describes the synthesis, characterization, crystal structure and magnetic properties of a two-dimensional azido-bridged NiIIMnII heterometallic coordination polymer, [{(NiIILMnII)2(µ1,1,3-N3)2}(µ1,3-N3)2]n (1), in which H2L Schiff base is the [2+1] condensation product of 3-methoxysalicylaldehyde and 1,3-diaminopropane. In 1, two bis(µ-phenoxo)-µ1,1,3-azido-NiIIMnII dinuclear units are interlinked to form a dimer-of-dinuclear moiety {NiIIMnII}2; the {NiIIMnII}2 structural units are further interlinked each other by µ1,3-azido ligands to form the layered coordination polymer. Upon cooling, the χMT product slowly decreases from 300 K to about 100 K, then increases abruptly from 3.74 cm3 K mol–1 at 100 K to 113.2 cm3 K mol–1 at 30 K, indicating a ferrimagnetic behaviour; a three-dimensional magnetic order below 37 K was determined by the divergence in the ZFC-FC measurements and ac measurements, in which the peak temperature 35 K in the in-phase at different frequencies suggests the Curie temperature is 35 K, whereas the out-of-phase is somewhat frequency dependent, being ascribing to glassy magnet behaviour. The title compound is among the rare examples of metallo-organic systems having magnetic ordering Curie temperature above 30 K. Other interesting aspects in 1 regarding magnetic properties and structural features are discussed.

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Publication details

The article was received on 26 Oct 2017, accepted on 30 Nov 2017 and first published on 01 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT04032F
Citation: Dalton Trans., 2017, Accepted Manuscript
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    A nickel(II)-manganese(II)-azido layered coordination polymer showing a three-dimensional ferrimagnetic order at 35 K

    S. Ghosh, S. Roy, C. Liu and S. Mohanta, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT04032F

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