Biomimetics with a self-assembled monolayer of catalytically active tethered isoalloxazine on au

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A new biomimetic nanostructured electrocatalyst comprised of a self-assembled monolayer (SAM) of flavin covalently attached to Au by reaction of methylformylisoalloxazine with chemisorbed cysteamine is introduced. Examinations by Fourier transform infrared spectroscopy and scanning tunneling microsc...

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Detalles Bibliográficos
Autor principal: Calvo, E.J
Otros Autores: Rothacher, M.S, Bonazzola, C., Wheeldon, I.R, Salvarezza, R.C, Vela, M.E, Benitez, G.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2005
Acceso en línea:Registro en Scopus
DOI
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Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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003 AR-BaUEN
005 20230518203330.0
008 190411s2005 xx ||||fo|||| 00| 0 eng|d
024 7 |2 scopus  |a 2-s2.0-33748308861 
024 7 |2 cas  |a gold, 7440-57-5; mercaptamine, 156-57-0, 27761-19-9, 60-23-1; nicotinamide adenine dinucleotide, 53-84-9; Cysteamine, 60-23-1; Flavins; Gold, 7440-57-5; Membranes, Artificial; NAD, 53-84-9; methylformylisoalloxazine 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
030 |a LANGD 
100 1 |a Calvo, E.J. 
245 1 0 |a Biomimetics with a self-assembled monolayer of catalytically active tethered isoalloxazine on au 
260 |c 2005 
270 1 0 |m Calvo, E.J.; Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, AR-1428 Buenos Aires, Argentina; email: calvo@qi.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a A new biomimetic nanostructured electrocatalyst comprised of a self-assembled monolayer (SAM) of flavin covalently attached to Au by reaction of methylformylisoalloxazine with chemisorbed cysteamine is introduced. Examinations by Fourier transform infrared spectroscopy and scanning tunneling microscopy (STM) show that the flavin molecules are oriented perpendicular to the surface with a 2 nm separation between flavin molecules. As a result of the contrast observed in the STM profiles between areas only covered by unreacted cysteamine and those covered by flavin-cysteamine moieties, it can be seen that the flavin molecules rise 0.7 nm above the chemisorbed cysteamines. The SAM flavin electrocatalyst undergoes fast electron transfer with the underlying Au and shows activity toward the oxidation of enzymatically active β-NADH at pH 7 and very low potential (-0.2 V vs Ag/AgCl), a requirement for use in an enzymatic biofuel cell, and a 100-fold increase in activity with respect to the collisional reaction in solution. © 2005 American Chemical Society.  |l eng 
593 |a Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, AR-1428 Buenos Aires, Argentina 
593 |a Instituto National de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Casilla de Correo 16, Suc. 4, 1900 La Plata, Argentina 
690 1 0 |a COLLISIONAL REACTION 
690 1 0 |a CYSTEAMINE MOIETIES 
690 1 0 |a FLAVIN ELECTROCATALYSTS 
690 1 0 |a FLAVIN MOLECULES 
690 1 0 |a CATALYSIS 
690 1 0 |a ENZYMES 
690 1 0 |a FOURIER TRANSFORM INFRARED SPECTROSCOPY 
690 1 0 |a GOLD 
690 1 0 |a MONOLAYERS 
690 1 0 |a PH EFFECTS 
690 1 0 |a REACTION KINETICS 
690 1 0 |a SCANNING TUNNELING MICROSCOPY 
690 1 0 |a SELF ASSEMBLY 
690 1 0 |a SEPARATION 
690 1 0 |a BIOMIMETIC MATERIALS 
690 1 0 |a GOLD 
690 1 0 |a MERCAPTAMINE 
690 1 0 |a METHYLFORMYLISOALLOXAZINE 
690 1 0 |a NANOMATERIAL 
690 1 0 |a NICOTINAMIDE ADENINE DINUCLEOTIDE 
690 1 0 |a RIBOFLAVIN DERIVATIVE 
690 1 0 |a ARTICLE 
690 1 0 |a ARTIFICIAL MEMBRANE 
690 1 0 |a BIOMIMETICS 
690 1 0 |a CATALYSIS 
690 1 0 |a CHEMICAL STRUCTURE 
690 1 0 |a CHEMISTRY 
690 1 0 |a ELECTROCHEMISTRY 
690 1 0 |a INFRARED SPECTROSCOPY 
690 1 0 |a OXIDATION REDUCTION REACTION 
690 1 0 |a SCANNING TUNNELING MICROSCOPY 
690 1 0 |a SENSITIVITY AND SPECIFICITY 
690 1 0 |a SURFACE PROPERTY 
690 1 0 |a BIOMIMETICS 
690 1 0 |a CATALYSIS 
690 1 0 |a CYSTEAMINE 
690 1 0 |a ELECTROCHEMISTRY 
690 1 0 |a FLAVINS 
690 1 0 |a GOLD 
690 1 0 |a MEMBRANES, ARTIFICIAL 
690 1 0 |a MICROSCOPY, SCANNING TUNNELING 
690 1 0 |a MOLECULAR STRUCTURE 
690 1 0 |a NAD 
690 1 0 |a NANOSTRUCTURES 
690 1 0 |a OXIDATION-REDUCTION 
690 1 0 |a SENSITIVITY AND SPECIFICITY 
690 1 0 |a SPECTROSCOPY, FOURIER TRANSFORM INFRARED 
690 1 0 |a SURFACE PROPERTIES 
700 1 |a Rothacher, M.S. 
700 1 |a Bonazzola, C. 
700 1 |a Wheeldon, I.R. 
700 1 |a Salvarezza, R.C. 
700 1 |a Vela, M.E. 
700 1 |a Benitez, G. 
773 0 |d 2005  |g v. 21  |h pp. 7907-7911  |k n. 17  |p Langmuir  |x 07437463  |t Langmuir 
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856 4 0 |u https://doi.org/10.1021/la050695n  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_07437463_v21_n17_p7907_Calvo  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v21_n17_p7907_Calvo  |y Registro en la Biblioteca Digital 
961 |a paper_07437463_v21_n17_p7907_Calvo  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
963 |a VARI 
999 |c 64945 

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