Sinteza și caracterizarea polimerilor coordinativi ai Zn(II) și Cd(II) în baza
liganzilor punte azinici și azometinicii
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StatusThe thesis was presented on the 18 June, 2021Approved by NCAA on the 22 December, 2021 Abstract – 3.46 Mb / in romanian – 3.52 Mb / in englishThesisCZU 544.23/.25.057:546.4(043.2)
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Summary
Thesis structure: The thesis was conducted at the Institute of Chemistry, in the
Coordination Chemistry laboratory. It is written in Romanian and consists of introduction, 4
chapters, general conclusions and recommendations, bibliography of 264 titles, 126 pages of
basic text, 103 figures and 4 tables. The obtained results were published in 27 scientific papers,
including: a patent application, 6 articles in peer-reviewed journals listed in the ISI and SCOPUS
database and 20 abstracts presented and published at National and International Conferences.
Keywords: synthesis, coordination polymers, azine and azomethine ligands, crystal
structure, spectroscopic characterization, photoluminescence.
The purpose of this thesis is synthesis and characterization of coordination polymers
based on Zn(II)/Cd(II) ions and azine/azomethine bridging ligands of N,N'-donor type and
additional various inorganic and organic ligands, study of photoluminescence and sorption
properties.
Research objectives: synthesis of coordination polymers based on Zn(II)/Cd(II) ions
using the technique of mixed coligands including azine and azomethine bridging ligands at type
N,N'-donors and various inorganic or organic anionic ligands; studying the crystal structure and
elucidation of the role of the anionic ligand and the solvent in the extension and modeling of the
polymeric structure; functionalization of the synthesized compounds by elimination or
substitution of the guest molecules; investigation of thermal and chemical stability; investigation
of structure-property relationship, especially in case of photoluminescence and sorption
properties.
Scientific novelty and originality: starting from inorganic salts of zinc(II) and
cadmium(II) and continuing with the substitution of the inorganic anion with organic anions, 42
coordination compounds were obtained based on azine and azomethine bridge ligands, of which
39 reveal 1D, 2D and 3D-dimensional polymeric structure.
The solved scientific problem consists in identifying materials with porous structure,
capable absorbing small molecules and having photoluminescent properties.
The theoretical significance consists in elucidating the way of self-assembly of
coordination polymers and establishing the role of anionic ligand and solvent in the extension
and modeling of coordination polymers. The structure-property correlation in the synthesized
compounds and the possibilities of adjusting the pore size depending on the used ligands have
been also elucidated.
The applicative value of the thesis consists in the extension of the range of substances
with porous structure based on coordination polymers of cadmium(II) and zinc(II) with
photoluminescent properties and capacity of sorption and exchange of small molecules.
Implementation of scientific results. The scientific results were partially used in the
instructive-educational process carried out at UST. The photoluminescent activity and the
absorption and exchange capacity of the guest molecules suggest the possibility of using
coordination compounds with porous structure as sensors for the detection of small molecules.
Oficial Reviewers
- Ion Bulhac
doctor habilitat, associate professor (docent), Institute of Chemistry of the ASM - Vasile Lozan
doctor habilitat, associate professor (docent) - Ion Bulimestru
doctor, associate professor (docent) - Silvia Melnic
doctor, associate professor (docent)
Council's Members
- Aurelian Gulea, president
doctor habilitat, professor, Moldova State University - Ion Bulhac,
doctor habilitat, associate professor (docent), Institute of Chemistry of the ASM - Vasile Lozan,
doctor habilitat, associate professor (docent) - Ion Bulimestru,
doctor, associate professor (docent) - Silvia Melnic ,
doctor, associate professor (docent) - Diana Dragancea, member
doctor, associate professor (docent) - Eduard Coropceanu, member
doctor, professor, Institute of Chemistry of the ASM - Marina Fonari, member
doctor, associate professor (docent), Institute of Applied Physics of the
Theses
