Properties of homo- and heterometallic complexes prepared using tris(oxalato)chromate(III) and tris(oxalato)ferrate(III) building blocks with alkyl-ammonium cations

Lozančić, Ana (2025) Properties of homo- and heterometallic complexes prepared using tris(oxalato)chromate(III) and tris(oxalato)ferrate(III) building blocks with alkyl-ammonium cations. Doctoral thesis, Sveučilište u Zagrebu, Prirodoslovno-matematički fakultet.

PDF (Doctoral thesis) - Published Version - other Download (13MB)

Abstract

By reacting aqueous solutions of the building blocks [M(C2O4)3]3– (M = Cr3+, Fe3+) containing cations (CH3)2(C2H5)NH+ or (CH3)(C2H5)2NH+ with simple salts of transition metals (Cu2+, Mn2+ or Co2+), with the addition of N-donor ligands, 23 new compounds with incorporated alkyl-substituted cations were prepared. 13 heterometallic (8 [MnIICrIII], 3 [CoIICrIII], 1 [MnIIFeII] and 1 [CoIIFeIII]) and 10 homometallic (7 [CrIII], 2 [FeIII] and 1 [MnII]) compounds with different nuclearity and dimensionality were isolated. The properties of the prepared compounds were investigated by IR and UV/Vis spectroscopy, thermal analysis, single-crystal and powder X-ray diffraction and magnetization measurements. The electrical properties of selected compouns were investigated using impedance spectroscopy by measuring the dependence of conductivity on relative humidity and temperature. Three selected heterometallic compounds were investigated as molecular precursors for the preparation of pure oxide phases with spinel structure by thermal decomposition in one step. Four spinel oxides were obtained by pyrolysis of a mixture of two or three oxalate complexes in a suitable ratio. The (micro)structural, optical and photocatalytic properties in the degradation of the organic dyes under visible irradiation without and with addition of H2O2 were investigated for all oxides, as well as the magnetic and electrical properties for selected oxides.

Item Type:	Thesis (Doctoral thesis)
Uncontrolled Keywords:	tris(oxalato) building blocks; homo- and heterometallic compounds; molecular precursors; mixed metal oxides; proton conductivity; photocatalytic activity
Subjects:	NATURAL SCIENCES > Chemistry > Inorganic Chemistry
Divisions:	Division of Materials Chemistry
Depositing User:	Ana Lozančić
Date Deposited:	05 Feb 2025 10:29
URI:	http://fulir.irb.hr/id/eprint/9540

Actions (login required)

View Item