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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Voltammetric Behavior of a Chemically Modified Silsesquioxane with 4-Amino-5-Phenyl-4h-[1,2,4]-Triazole-3-Thiol and its Application for Detection of L-Dopamine

Author(s):
Silvestrini, Daniela Rodrigues [1] ; Serantoni da Silveira, Tayla Fernanda [1] ; Bicalho, Urquisa de Oliveira [1] ; do Carmo, Devaney Ribeiro [1]
Total Authors: 4
Affiliation:
[1] Univ Estadual Paulista, UNESP, Fac Engn Ilha Solteira, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: International Journal of Electrochemical Science; v. 10, n. 4, p. 2839-2858, APR 2015.
Web of Science Citations: 3
Abstract

A hybrid nanocomposite formed by interaction of a octakis(3-chloropropyl) octasilsesquioxane (SS) modified with 4-Amino-5-Phenyl-4H-1,2,4-Triazole-3-Thiol (APhTT), and its subsequent reaction with copper and hexacyanoferrate (III) (CuHSA) was incorporated into a graphite paste electrode and the electrochemical studies were conducted with cyclic voltammetry. The cyclic voltammogram of the graphite paste electrode modified with CuHSA, showed one redox couple with average potential E-theta = 0.71V (vs Ag/AgCl(sat.)), attributed to the (CuFeII)-Fe-II(CN)(6)/(CuFeIII)-Fe-II(CN)(6) process (20% w/w; v= 20 mV s(-1); KCl; 1.00 mol L-1) The graphite paste electrode modified with CuHSA allowed the electrocatalytic determination of L-Dopamine using electrochemical techniques such as, cyclic voltammetry and differential pulse voltammetry. Through differential pulse voltammetry was possible to evidence two linear regions in the studied concentration range and the detection limit obtained by this technique was lower than that obtained by the technique of cyclic voltammetry. (AU)

FAPESP's process: 13/08495-9 - Porous materials and composites chemically modified with zirconium (IV) and phosphoric acid: Preparation and electroanalytical applications.
Grantee:Tayla Fernanda Serantoni da Silveira
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 12/05438-1 - Development of novel nanostructured organically functionalized hybrid silsesquioxanes: preparation, characterization and its application as a sensor of compounds and ions of environmental and biological interest
Grantee:Devaney Ribeiro Do Carmo
Support Opportunities: Regular Research Grants
FAPESP's process: 12/11306-0 - Electrochemical quantification of analytes of environmental and biological interest, using new materials prepared from functionalized silsesquioxanes.
Grantee:Daniela Silvestrini Fernandes
Support Opportunities: Scholarships in Brazil - Doctorate