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Precursors and new materials based on Bismuth(III) heteronuclear compounds with some 3d elements

Author: Ion Bulimestru
Degree:doctor of chemistry
Speciality: 02.00.01 - Inorganic chemistry
Scientific adviser: Aurelian Gulea
doctor habilitat, professor, Moldova State University
Scientific council:


The thesis was presented on the 15 March, 2007
Approved by NCAA on the 19 April, 2007


Adobe PDF document0.93 Mb / in romanian


CZU C.Z.U.: 541.49 + 546.87 +546.73’56

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118 pages


heteronuclear coordination compounds, aminepolycarboxylic and salicylic acids, organic bases, bismuth, cobalt, copper, vanadium, chromium, precursors, materials, mixed oxides, dielectrics, catalysts, anticancer agents


The dissertation is devoted to the synthesis and investigation of bismuth(III) heterometallic coordination compounds with some 3d metals as materials with catalytic, electric or biologic properties as well as suitable precursors to mixed-oxide systems.

The synthesis methods of 34 new bismuth(III) heterometallic compounds with cobalt(II), cobalt(III), copper(II), oxovanadium(IV), chromium(III) and bi-, tri or polydentate organic ligands have been elaborated or improved.

By means of element and thermogravimetric analyses, IR and NMR spectroscopies and single crystal X ray diffraction the composition of all and structure of ten synthesized compounds have been established.

Different powder X ray diffraction techniques have been applied in order to identify the inorganic residues resulted from thermal treatment of the obtained heterometallic compounds. Some Bi(III)-Cu(II) and Bi(III)-VO(II) coordination complexes have been found to be convenient molecular precursors for Bi2CuO4 and Bi4V2O11 or BiVO4 mixed-oxide systems. Heterometallic coordination compounds of bismuth(III) and copper (II) with salicylaldehyde thiosemicarbazone of 1·10-6 mol/l concentration are capable to effectively inhibit human leukemia (HL-60) cells growth.

The compound [Cu(H2O)6][Bi(edta)]2·3H2O displays high catalytic activity in hydrogen emission process through radiolytic water decomposition, meanwhile the complexes from Co(III)- Bi(III)-dtpa series proved to be dielectric materials with high values of specific resistance.

The results of this work have been published in the shape of 4 articles, 3 patents and 16 abstracts at different local and international conferences.