NDLI: Silsesquioxane organofunctionalized with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole: Preparation and subsequent reaction with silver and potassium hexacyanoferrate(III) for detection of L-cysteine.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Do Carmo, Devaney R. Silvestrini, Daniela R. da Silveira, Tayla F. S. Cumba, Loanda R. Dias Filho, Newton L. Soares, Layciane A.
Description	Author Affiliation: do Carmo DR ( Departamento de Física e Química, Universidade Estadual Paulista 'Júlio de Mesquita Filho' - UNESP, Avenida Brasil, 56, CEP 15.385-000 Ilha Solteira, SP, Brazil. Electronic address: docarmo@dfq.feis.unesp.br.); Silvestrini DR ( Departamento de Física e Química, Universidade Estadual Paulista 'Júlio de Mesquita Filho' - UNESP, Avenida Brasil, 56, CEP 15.385-000 Ilha Solteira, SP, Brazil.); da Silveira TF ( Departamento de Física e Química, Universidade Estadual Paulista 'Júlio de Mesquita Filho' - UNESP, Avenida Brasil, 56, CEP 15.385-000 Ilha Solteira, SP, Brazil.); Cumba LR ( Departamento de Física e Química, Universidade Estadual Paulista 'Júlio de Mesquita Filho' - UNESP, Avenida Brasil, 56, CEP 15.385-000 Ilha Solteira, SP, Brazil.); Dias Filho NL ( Departamento de Física e Química, Universidade Estadual Paulista 'Júlio de Mesquita Filho' - UNESP, Avenida Brasil, 56, CEP 15.385-000 Ilha Solteira, SP, Brazil.); Soares LA ( Departamento de Física e Química, Universidade Estadual Paulista 'Júlio de Mesquita Filho' - UNESP, Avenida Brasil, 56, CEP 15.385-000 Ilha Solteira, SP, Brazil.)
Abstract	The octakis(3-chloropropyl)octasilsesquioxane (SS) was organofunctionalized with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (Purpald). The functionalized silsesquioxane with Purpald (SP) was characterized by Fourier transform infrared spectroscopy (FT-IR), and nuclear magnetic resonance (NMR). After functionalized, silsesquioxane can interact with silver nitrate and subsequently with potassium hexacyanoferrate (III) (AgHSP). The novel hybrid composite formed (AgHSP) was characterized by Fourier transform infrared spectra, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). AgHSP was electrochemically characterized by cyclic voltammetry (CV) using graphite paste electrode. The AgHSP incorporated into a graphite paste electrode (20% w/w) was tested for detection of l-cysteine. The modified electrode showed a linear response from 9.0 × 10(-5) to 5.0 × 10(-3)mol L(-1) with the corresponding equation Y(A)=0.01315+1.865 [l-cysteine], and a correlation coefficient of r(2)=0.9995. The method showed a detection limit of 1.76×10(-4)mol L(-1) with a relative standard deviation of ± 2% (n=3) and amperometric sensitivity of 1.865 A/mol L(-1).
File Format	HTM / HTML
ISSN	09284931
Volume Number	57
e-ISSN	18730191
Journal	Materials Science and Engineering: C
Language	English
Publisher	Elsevier
Publisher Date	2015-12-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Subject Keyword	Discipline Materials Science Conductometry Instrumentation Cysteine Analysis Ferricyanides Chemistry Nanocomposites Organosilicon Compounds Silver Equipment Design Equipment Failure Analysis Ultrastructure Reproducibility Of Results Sensitivity And Specificity Sulfhydryl Compounds Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Biomaterials Condensed Matter Physics Bioengineering Mechanical Engineering

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