Ladder-like [CrCu] coordination polymers containing unique bridging modes of [Cr(C2O4)3]3− and Cr2O72−

Scientific paper - Original scientific paper

• Author: Lidija Kanižaj
• Author: Krešimir Molčanov
• Author: Filip Torić
• Author: Damir Pajić
• Author: Ivor Lončarić
• Author: Ana Šantić
• Author: Marijana Jurić
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Author's institution: University of Zagreb; Faculty of Science; (Department of Chemistry)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract (english)

Three heterometallic one-dimensional (1D) coordination polymers {A[CrCu2(bpy)2(C2O4)4]·H2O}n [A = K+ (1) and NH4+ (2) ; bpy = 2, 2’-bipyridine] and [(Cr2O7)Cu2(C2O4)(phen)2]n (3 ; phen = 1, 10- phenanthroline) with uncommon topology have been synthesized using a building block approach and characterized by single-crystal X- ray diffraction, IR and impedance spectroscopies, magnetization measurements, and DFT calculations. Due to the partial decomposition of the building block [Cr(C2O4)3]3−, all three compounds contain oxalate-bridged [Cu2(L)2(μ-C2O4)]2+ units [L = bpy (1 and 2) and phen (3)]. In compounds 1 and 2 these cations are mutually connected through oxalate groups from [Cr(C2O4)3]3−, thus forming ladderlike topologies. Unusually, three different bridging modes of the oxalate ligand are observed in these chains. In compound 3 copper(II) ions from cationic units are bridged through the oxygen atoms of Cr2O72− anions in a novel ladder-like mode. Very strong antiferromagnetic coupling observed in all three compounds, determined from the magnetization measurements and confirmed by DFT calculations (J = −343, −371 and −340 cm−1 for 1, 2 and 3, respectively), appears between two copper(II) ions interacting through the oxalate bridge.

• Keywords (english): coordination polymers; bridging oxalate; bridging dichromate; ladder-like topology; antiferromagnetic interaction
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Accepted version
• Journal title: Dalton Transactions
• Numbering: vol. 48, no. 22, pp. 7891-7898
• p-ISSN: 1477-9226
• e-ISSN: 1477-9234
• DOI: https://doi.org/10.1039/C9DT01195A
• URN:NBN: urn:nbn:hr:217:689517
• Publication: 2019
• Project: Number: UIP-2014-09-8276; Title (croatian): Magnetoelektrični multiferoični sustavi; Acronym: FerMaEl; Leader: Damir Pajić; Jurisdiction: Croatia; Funding stream: UIP
• Project: Number: IP-2014-09-4079; Title (croatian): Novi metal-organsi sustavi s oksalatnim i kinoidnim ligandima s podešenim svojstvima pogodnim za primjenu; Title (english): Novel metal-organic systems based on the oxalate and quinoid ligands with tuned properties suitable for applications; Acronym: NMOSBOQLWTPSFP; Leader: Krešimir Molčanov; Jurisdiction: Croatia; Funding stream: IP
• Document URL: http://xlink.rsc.org/?DOI=C9DT01195A
• Type of resource: Text
• Access conditions: Open access
• Created on: 2021-11-18 21:22:26