3D oxalate-based coordination polymers: Relationship between structure, magnetism and color, studied by high-field ESR spectroscopy

High field electron spin resonance (HF-ESR) study of three 3D oxalate-based coordination polymers, supported by crystallographic, photoluminescence (PL), elemental (EDX) and X-band ESR analysis. [Display omitted] The detailed high field electron spin resonance (HF-ESR) study of three 3D oxalate-base...

Full description

Saved in:

Bibliographic Details
Published in:	Polyhedron Vol. 126; pp. 120 - 126
Main Authors:	Žilić, D., Molčanov, K., Jurić, M., Habjanič, J., Rakvin, B., Krupskaya, Y., Kataev, V., Wurmehl, S., Büchner, B.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 18-04-2017
Subjects:	Coordination polymer ESR High field High frequency Mn(II) High field Mn(II) High frequency ESR Coordination polymer
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	High field electron spin resonance (HF-ESR) study of three 3D oxalate-based coordination polymers, supported by crystallographic, photoluminescence (PL), elemental (EDX) and X-band ESR analysis. [Display omitted] The detailed high field electron spin resonance (HF-ESR) study of three 3D oxalate-based coordination polymers with antiferromagnetic ordering below 13K, supported by crystallographic, photoluminescence (PL), elemental (EDX) and X-band ESR analysis, is presented. Two of the investigated compounds are described by the same chemical formula {[Cu(bpy)3][Mn2(C2O4)3]·H2O}n, both exhibit PL but have different colors: green–blue and red–pink (CuMn2-Green and CuMn2-Red, respectively) while {[Co(bpy)3][Mn2(C2O4)3]·H2O}n is yellow (CoMn2-Yellow) without PL. Despite different colors of CuMn2-Green and CuMn2-Red, X-ray diffraction, EDX, as well as X-band ESR, could not reveal any difference between these compounds. Therefore, detailed temperature dependent multifrequency HF-ESR experiments were performed. Owing to very high resolution of HF-ESR, two different Mn(II) centers in CuMn2-Green and CoMn2-Yellow compounds could be resolved, while in CuMn2-Red only one Mn(II) center is detected. A possible difference in the ligand coordination of Mn(II) ions in the oxalate-networks of CuMn2-Green and CuMn2-Red, that gives rise to slightly different g-factors, is discussed with respect to the different colors of these compounds.
ISSN:	0277-5387
DOI:	10.1016/j.poly.2017.01.009