Banca de DEFESA: ISABELLE KARINE VIEIRA GONÇALVES
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : ISABELLE KARINE VIEIRA GONÇALVES
DATA : 20/03/2020
HORA: 10:00
LOCAL: campus VI
TÍTULO:
Synthesis, structural and physical-chemical characterization of monomers and coordination polymers of copper containing isophthalate and N,N-donor ligants.
PALAVRAS-CHAVES:
2,2'-bipyridine, 1,10-phenanthroline, isophthalate, copper(II), coordination polymers.
PÁGINAS: 70
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Inorgânica
ESPECIALIDADE: Campos de Coordenação
RESUMO:
The study and preparation of new copper compounds have high scientific relevance, since they have a wide application area, such as magnetic characteristics, pharmacological potential, catalytic action, among other properties of technological interest. Copper compounds have great structural versatility being capable of forming mono and multinuclear complexes with different geometries and properties. The chemical reaction between copper(II) and the ligands isophthalate (ipa) and 1.10-phenanthroline (phen) by two different synthetic routes, led to the formation of two new compounds. One compound consisted of Polymer of coordination, {[Cu(ipa)(phen)(H2O)]‧DMF} n, in which the ligand ipa acts as a bridge between adjacent copper ions connecting to the metal centers in mono and bicoordinate way by the carboxylate groups. The other compound consisted of two cocrystallized monomers, [Cu(Hipa)(phen)(H2O)2] ClO4·[Cu(ipa)(phen)(H2O)2]‧2H2O, in which in one monomer the ligand ipa is found monoprotonated requiring a perchlorate as a counter-ion and in the other complex, the ipa is totally deprotonated, generating a neutral complex. On the other hand, replacing phen with the 2,2'-bipyridine (bpy) and following the same synthetic procedures is only formed a coordination polymer, {[Cu(ipa)(bpy)]‧2H2O}n, as a principal product independently of the adopted procedure. Interestingly, a copper(I) tetranuclear cluster, [Cu4(µ2-Cl)4(bpy)2], was formed as a by-product of the hydrothermal reaction to obtain {[Cu(ipa)(bpy)]‧2H2O}n. Although the cluster has been previously related, it was produced in the shortest reactive time than that listed in the literature. Moreover, the complex (Hampy)2[CuCl4], where ampy = 2-aminopyridine, was obtained by a distinct synthetic route that the reported in the literature. All prepared complexes were physical-chemical and structurally characterized by elemental analysis, atomic absorption, vibrational spectroscopy and X-ray diffraction by monocrystal.
MEMBROS DA BANCA:
Presidente - PRISCILA PEREIRA SILVA CALDEIRA
Interna - RAQUEL VIEIRA MAMBRINI
Externa ao Programa - IVINA PAULA DE SOUZA
Externa à Instituição - RENATA DINIZ - UFMG