Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption

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...

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Autores principales: Marmisolle, Waldemar Alejandro, Capdevila, Daiana Andrea, De La Llave, Ezequiel Pablo, Williams, Federico Jose, Murgida, Daniel Horacio
Publicado: 2013
Materias:
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
Alkanes
Cytochromes c
Electron Transport
Gold
Hydrogen-Ion Concentration
Sulfhydryl Compounds
Surface Properties
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v29_n17_p5351_Marmisolle
http://hdl.handle.net/20.500.12110/paper_07437463_v29_n17_p5351_Marmisolle
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_07437463_v29_n17_p5351_Marmisolle
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spelling paper:paper_07437463_v29_n17_p5351_Marmisolle2023-06-08T15:45:01Z Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption Marmisolle, Waldemar Alejandro Capdevila, Daiana Andrea De La Llave, Ezequiel Pablo Williams, Federico Jose Murgida, Daniel Horacio 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 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. Fil:Marmisollé, W.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capdevila, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:De La Llave, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Williams, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Murgida, D.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v29_n17_p5351_Marmisolle http://hdl.handle.net/20.500.12110/paper_07437463_v29_n17_p5351_Marmisolle
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Marmisolle, Waldemar Alejandro
Capdevila, Daiana Andrea
De La Llave, Ezequiel Pablo
Williams, Federico Jose
Murgida, Daniel Horacio
Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
topic_facet 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
description 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.
author Marmisolle, Waldemar Alejandro
Capdevila, Daiana Andrea
De La Llave, Ezequiel Pablo
Williams, Federico Jose
Murgida, Daniel Horacio
author_facet Marmisolle, Waldemar Alejandro
Capdevila, Daiana Andrea
De La Llave, Ezequiel Pablo
Williams, Federico Jose
Murgida, Daniel Horacio
author_sort Marmisolle, Waldemar Alejandro
title Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
title_short Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
title_full Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
title_fullStr Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
title_full_unstemmed Self-assembled monolayers of NH2-terminated thiolates: Order, pKa, and specific adsorption
title_sort self-assembled monolayers of nh2-terminated thiolates: order, pka, and specific adsorption
publishDate 2013
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v29_n17_p5351_Marmisolle
http://hdl.handle.net/20.500.12110/paper_07437463_v29_n17_p5351_Marmisolle
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