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Coordination compounds of some 3d-metals with Schiff bases, obtained on the base of aromatic carbonyl compounds and hydrazides of carboxylic acids. Synthesis, structure, properties


Author: Danilescu Olga
Degree:doctor of chemistry
Speciality: 02.00.01 - Inorganic chemistry
Year:2019
Scientific adviser: Ion Bulhac
doctor habilitat, associate professor (docent), Institute of Chemistry of the ASM
Institution: Institute of Chemistry of the ASM

Status

The thesis was presented on the 12 June, 2019 at the meeting of the Scientific Council and now it is under consideration of the National Council.

Abstract

Adobe PDF document1.47 Mb / in romanian

Thesis

CZU 546.6:547.57(043.2)

Adobe PDF document 6.26 Mb / in romanian
160 pages


Keywords

coordination compounds, 3d-metals, Schiff bases, X-ray diffraction, IR spectroscopy, biological activity, adsorption

Summary

Thesis structure: introduction, 4 chapters, general conclusions and recommendations, literature containing 157 references, 4 attachments, 132 pages of basic text, 66 figures and 14 tables. The obtained results are published in 33 scientific publications.

The purpose of the thesis: synthesis and characterization of new coordination compounds with valuable properties for science and technology, as well as studying the influence of the nature of the metal and ligands on chemical composition, structure and properties of the complexes.

Research objectives: improvement of the synthesis strategy of new complexes on the base of aromatic hydrazones with some 3d metals; determination of chemical composition, molecular and crystal structure using modern methods of research; testing and establishing biologically and technologically valuable properties of the synthesized complexes.

Novelty and scientific originality consist in the synthesis of 53 new coordination compounds, which structures were determined by X-ray diffraction and IR spectroscopy.

Scientific problem solved: synthesis and characterization of the complexes with original structure (pentagonal-bipyramidal, macrocyclic) and valuable properties (biostimulating, inhibiting, antioxidative, adsorptive, luminescent) for microbiology and technology.

The obtained results that contribute to the solving of an important scientific problem in the thesis consist in the elaboration of the synthesis and research procedures of the new coordination compounds, which generated complexes with the original architecture, for later application in biology and technique.

Theoretical significance: the obtained compounds of Co(II), Fe(III), V(II), V(IV), Cu(II) and Zn(II) have original (pentagonal-bipyramidal, macrocyclic and polymer) structures.

Practical importance: the complexes reveal stimulating, inhibiting and antioxidative properties during cultivation of microorganisms Aspergillus niger, Nostoc linckia and Porphyridium cruentum.

Implementation of the scientific results: due to their biological activity, some ligands and complexes protected by Moldovan patents, can be used in agriculture for plant protection.