Título: | STUDY OF THE ELECTROCHEMICAL BEHAVIOR OF SAME CALIXARENES IN THE PRESENT OF IONS METALS | ||||||||||||||||||||||||||||||||||||
Autor: |
MARISTELA DE CASTRO REZENDE |
||||||||||||||||||||||||||||||||||||
Colaborador(es): |
PERCIO AUGUSTO MARDINI FARIAS - Orientador JOSINO COSTA MOREIRA - Coorientador |
||||||||||||||||||||||||||||||||||||
Catalogação: | 27/OUT/2005 | Língua(s): | PORTUGUESE - BRAZIL |
||||||||||||||||||||||||||||||||||
Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
||||||||||||||||||||||||||||||||||||
Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=7366&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=7366&idi=2 |
||||||||||||||||||||||||||||||||||||
DOI: | https://doi.org/10.17771/PUCRio.acad.7366 | ||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||
The study of the electrochemical behavior of electrodes of
carbon paste
chemically modified with the following calixarenes: 4-sulf-
calix[4]arene and 4-terc-butilcalix[4,6,8]arene was investigated in the
present of cations (Sb3+, Se4+, Mn2+, Cd2+, Zn2+, Cu2+, Pb2+, V4+ and V5+)
using differential pulse , square wave and cyclical voltammetry. Other
electrochemical studies for each cited calixarene was investigated.
Successive voltammograms in the way had been made differential pulse
voltammetric and sweepings linear (cyclic) under different scan rates
and observed that in the oxidation of the 4-sulf-calix[4]arene and 4-terc-
butilcalix[4,8]arene passivation and accumulation in the surface of exactly. In
the study of the electrochemical process observed in the presence of eight
cations (Sb3+, Se4+, Mn2+, Cd2+, Zn2+, Cu2+, Pb2+, V4+ and V5+) the
following electrodes of work was used: carbon paste modified with 4-terc-butilcalix
[4]arene, electrode carbon and unmodified carbon paste electrode.
Considerable attention was dedicated to the study of the behavior of
the 4-sulfcalix[4]arene in the present of V4+ and V5+ using as work
electrode the carbon and carbon paste modified with 4-terc-butil-calix[4]
areno and unmodified. It was observed, in presence of this ion
metallic, the appearance in the voltammogram of new peaks related to the
formation of complexes. An analytical useful voltammetric current was
gotten for oxidation of complex (calixarene / vanadium). The
interference of some cations (Sb3+, Se4+, Mn2+, Cd2+, Zn2+, Cu2+, Pb2+) in the
V4+ analysis in presence of 4-sulf-calix[4]areno was studied. Calibration
curve gotten in presence of V4+ had been constructed with
carbon paste modified with 4-terc-butilcalix[4]arene, unmodified carbon paste electrode
and carbon electrode in the presence of 4-sulfcalix[4]areno.
|
|||||||||||||||||||||||||||||||||||||
|