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Abstract:

Self-assembled monolayers (SAMs) of amino-terminated alkanethiols on Au were characterized by a combination of electrochemical (LSV, CV, and EIS) and spectroscopic (XPS and SER) techniques. Clear correlations were obtained between the apparent surface pKa values determined by impedimetric titrations and order parameters such as the content of trans conformers in the SAMs. These results contrast with previous studies that exhibit dispersions of up to 6 pH units in the reported pKa values. In addition, we determined that inorganic and organic phosphate species bind specifically to these SAMs mediating adsorption and heterogeneous electron transfer of positively charged macromolecules such as cytochrome c. © 2013 American Chemical Society.

Registro:

Documento: Artículo
Título:Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
Autor:Marmisollé, W.A.; Capdevila, D.A.; De La Llave, E.; Williams, F.J.; Murgida, D.H.
Filiación:Departamento de Quimica Inorganica, Analitica y Quimica Fisica and INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET, pab. 2, piso 3, C1428EHA-Buenos Aires, Argentina
Palabras clave:Alkanethiols; Amino-terminated; Heterogeneous electron transfer; Order parameter; Organic phosphates; Positively charged; Specific adsorption; Surface pK; Adsorption; Self assembled monolayers; alkane; cytochrome c; gold; thiol derivative; adsorption; article; chemistry; electron transport; metabolism; pH; surface property; synthesis; Adsorption; Alkanes; Cytochromes c; Electron Transport; Gold; Hydrogen-Ion Concentration; Sulfhydryl Compounds; Surface Properties
Año:2013
Volumen:29
Número:17
Página de inicio:5351
Página de fin:5359
DOI: http://dx.doi.org/10.1021/la304730q
Título revista:Langmuir
Título revista abreviado:Langmuir
ISSN:07437463
CODEN:LANGD
CAS:cytochrome c, 9007-43-6, 9064-84-0; gold, 7440-57-5; thiol derivative, 13940-21-1; Alkanes; Cytochromes c, 9007-43-6; Gold, 7440-57-5; Sulfhydryl Compounds
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v29_n17_p5351_Marmisolle

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Citas:

---------- APA ----------
Marmisollé, W.A., Capdevila, D.A., De La Llave, E., Williams, F.J. & Murgida, D.H. (2013) . Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption. Langmuir, 29(17), 5351-5359.
http://dx.doi.org/10.1021/la304730q
---------- CHICAGO ----------
Marmisollé, W.A., Capdevila, D.A., De La Llave, E., Williams, F.J., Murgida, D.H. "Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption" . Langmuir 29, no. 17 (2013) : 5351-5359.
http://dx.doi.org/10.1021/la304730q
---------- MLA ----------
Marmisollé, W.A., Capdevila, D.A., De La Llave, E., Williams, F.J., Murgida, D.H. "Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption" . Langmuir, vol. 29, no. 17, 2013, pp. 5351-5359.
http://dx.doi.org/10.1021/la304730q
---------- VANCOUVER ----------
Marmisollé, W.A., Capdevila, D.A., De La Llave, E., Williams, F.J., Murgida, D.H. Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption. Langmuir. 2013;29(17):5351-5359.
http://dx.doi.org/10.1021/la304730q