Synthesis, Structures, and Magnetic Properties of
End-to-End Azide-Bridged Manganese(III) Chains: Elucidation of Direct
Magnetostructural Correlation
Jeong Hwa Song
Kwang
Soo Lim
Dae Won Ryu
Sung Won Yoon
Byoung Jin Suh
Chang Seop Hong
10.1021/ic500676k.s002
https://acs.figshare.com/articles/journal_contribution/Synthesis_Structures_and_Magnetic_Properties_of_End_to_End_Azide_Bridged_Manganese_III_Chains_Elucidation_of_Direct_Magnetostructural_Correlation/2268643
The
two one-dimensional chain compounds [Mn(<b>L1</b>)(N<sub>3</sub>)]·H<sub>2</sub>O (<b>1</b>·H<sub>2</sub>O; H<sub>2</sub><b>L1</b> = 2,2′-((1<i>E</i>,1′<i>E</i>)-ethane-1,2-diylbis(azan-1-yl-1-ylidene))bis(phenylmethan-1-yl-1-ylidene)diphenol)
and [Mn(<b>L2</b>)(N<sub>3</sub>)] (<b>2</b>; H<sub>2</sub><b>L2</b> = 2,2′-((1<i>E</i>,1′<i>E</i>)-2,2-dimethylpropane-1,3-diyl)bis(azan-1-yl-1-ylidene)-bis(phenylmethan-1-yl-1-ylidene)diphenol)
bridged by single end-to-end azides were prepared via a self-assembly
process. Each Mn(III) ion exhibits a characteristic Jahn–Teller
elongation along the chain direction. For both compounds, antiferromagnetic
interactions between Mn(III) spins within a chain are transmitted
through the azide ligands, together with the apparent occurrence of
spin canting at low temperatures. Remarkably, the coupling constants
(<i>J</i>) for <b>1</b> and <b>2</b> exceed
those reported for end-to-end azide-linked Mn(III) systems. A systematic
magnetostructural relationship based on the torsion angle is established
in terms of the torsion angle Mn–N<sub>ax</sub>···N<sub>ax</sub>–Mn (ax = axial) for the first time.
2014-08-04 00:00:00
chain compounds
2O
Magnetic Properties
Mn
azide ligands
chain direction
2L
Direct Magnetostructural CorrelationThe
magnetostructural relationship
torsion angle
antiferromagnetic interactions