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Dimensionality controlled by light exposure: 1D versus 3D oxalate-bridged [CuFe] coordination polymers based on [Fe(C2O4)3]3− metallotecton


Kanižaj, Lidija; Androš Dubraja, Lidija; Torić, Filip; Pajić, Damir; Molčanov, Krešimir; Wenger, Emmanuel; Jurić, Marijana
Dimensionality controlled by light exposure: 1D versus 3D oxalate-bridged [CuFe] coordination polymers based on [Fe(C2O4)3]3− metallotecton // Inorganic Chemistry Frontiers, 6 (2019), 3327-3335 doi:10.1039/C9QI00926D (međunarodna recenzija, članak, znanstveni)


Naslov
Dimensionality controlled by light exposure: 1D versus 3D oxalate-bridged [CuFe] coordination polymers based on [Fe(C2O4)3]3− metallotecton

Autori
Kanižaj, Lidija ; Androš Dubraja, Lidija ; Torić, Filip ; Pajić, Damir ; Molčanov, Krešimir ; Wenger, Emmanuel ; Jurić, Marijana

Izvornik
Inorganic Chemistry Frontiers (2052-1553) 6 (2019); 3327-3335

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Coordination polymers ; oxalate-bridged ; ladder-like chains ; 3D network ; magnetization measurements

Sažetak
The heterodimetallic [CuIIFeIII] one-dimensional (1D) coordination polymers {; ; NH4[{; ; Cu(bpy)}; ; 2(C2O4)Fe(C2O4)3]·H2O}; ; n (1) and {; ; K[{; ; Cu(bpy)}; ; 2(C2O4)Fe(C2O4)3]·H2O}; ; n (2) (bpy = 2, 2'-bipyridine) were obtained using a building block approach by layering technique, from the reaction of aqueous solution of [Fe(C2O4)3]3– and methanol solutions of Cu2+ and bpy. In a test tube without the presence of light partial decomposition of the tris(oxalato)ferrate(III) anion occurred yielding oxalate-bridged dinuclear [Cu(bpy)(C2O4)Cu(bpy)]2+ units. These cationic species are mutually connected through oxalate groups from [Fe(C2O4)3]3–, thus forming ladder-like topologies in compounds 1 and 2. When the same reaction mixture was exposed to daylight, initial building block [Fe(C2O4)3]3– undergoes photoreduction producing [CuIIFeII] three-dimensional (3D) coordination polymer {; ; [Cu(bpy)3][Fe2(C2O4)3]·H2O}; ; n (3a). In addition, under hydrothermal conditions, the same reduction occurs giving compound {; ; [Cu(bpy)3][Fe2(C2O4)3]}; ; n (3b), that crystallizes without water molecule. The molecular structure of 3a and 3b consist of a 3D anionic network {; ; [Fe2(C2O4)3]}; ; n2n– and tris-chelated cations [Cu(bpy)3]2+ occupying the vacancies in the framework. Very strong antiferromagnetic coupling between two copper(II) ions from [Cu(bpy)(C2O4)Cu(bpy)]2+ species transferred through oxalate bridge was determined in 1 and 2 from the magnetization measurements. In 3a and 3b strong exchange interaction is present in Fe-oxalate network, {; ; [Fe2(C2O4)3]}; ; n2n–, and the ground state of compounds tends to zero-magnetization at the lowest temperature. Additionally, the ability of compound 3a (or 3b) to act as a single-source precursor for the formation of spinel oxide was investigated by thermal analysis (TG and DTA) and powder X-ray diffraction (PXRD).

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2014-09-4079 - Novi metal-organsi sustavi s oksalatnim i kinoidnim ligandima s podešenim svojstvima pogodnim za primjenu (Krešimir Molčanov, )
HRZZ-UIP-2014-09-8276 - Multiferični i magnetoelektrični sustavi (Damir Pajić, )

Ustanove
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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