Self-assembled monolayer of organic iodine on a Au surface for attachment of redox-active metal clusters

Ying Yu, Manish Dubey, Steven L. Bernasek, G Charles Dismukes

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The attachment of a bifunctional iodo-organo-phosphinate compound to gold (Au) surfaces via. chemisorption of the iodine atom is described and used to chelate a redox-active metal cluster via the phosphinate group. XPS, AFM, and electrochemical measurements show that (4-iodo-phenyl)phenyl phosphinic acid (IPPA) forms a tightly bound self-assembled monolayer (SAM) on Au surfaces. The surface coverage of an IPPA monolayer on Au was quantified by an electrochemical method and found to be 0.40 ± 0.03 nmol/cm 2, roughly corresponding to 0.4 monolayers. We show that the Au/IPPA SAM, but not the underivatized Au, adsorbs Mn 4O 4(Ph 2PO 2) 6 from solution by a phosphinate exchange reaction to yield Au/IPPA/Mn 4O 4(Ph 2PO 2) 5 SAM. The resulting SAM is firmly bound and not removed by sonication, as confirmed by manganese XPS (Mn 2p 1/2) and by AFM. Electrochemistry confirms that Mn 4O 4(Ph 2-PO 2) 6 is anchored on the Au/IPPA surface and that redox chemistry can be mediated between the electrode and the surface-attached complex. Mn 4O 4(Ph 2PO 2) 6 contains the reactive Mn 4O 4 6+ cubane core, a redox-active bioinspired catalyst.

Original languageEnglish
Pages (from-to)8257-8263
Number of pages7
JournalLangmuir
Volume23
Issue number15
DOIs
Publication statusPublished - Jul 17 2007

Fingerprint

Self assembled monolayers
metal clusters
Iodine
iodine
attachment
Metals
acids
Acids
Monolayers
X ray photoelectron spectroscopy
atomic force microscopy
cubane
Sonication
Electrochemistry
electrochemistry
Manganese
Chemisorption
chelates
Gold
chemisorption

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Self-assembled monolayer of organic iodine on a Au surface for attachment of redox-active metal clusters. / Yu, Ying; Dubey, Manish; Bernasek, Steven L.; Dismukes, G Charles.

In: Langmuir, Vol. 23, No. 15, 17.07.2007, p. 8257-8263.

Research output: Contribution to journalArticle

Yu, Ying ; Dubey, Manish ; Bernasek, Steven L. ; Dismukes, G Charles. / Self-assembled monolayer of organic iodine on a Au surface for attachment of redox-active metal clusters. In: Langmuir. 2007 ; Vol. 23, No. 15. pp. 8257-8263.
@article{aba09f7c4214439480879427ba12f2fe,
title = "Self-assembled monolayer of organic iodine on a Au surface for attachment of redox-active metal clusters",
abstract = "The attachment of a bifunctional iodo-organo-phosphinate compound to gold (Au) surfaces via. chemisorption of the iodine atom is described and used to chelate a redox-active metal cluster via the phosphinate group. XPS, AFM, and electrochemical measurements show that (4-iodo-phenyl)phenyl phosphinic acid (IPPA) forms a tightly bound self-assembled monolayer (SAM) on Au surfaces. The surface coverage of an IPPA monolayer on Au was quantified by an electrochemical method and found to be 0.40 ± 0.03 nmol/cm 2, roughly corresponding to 0.4 monolayers. We show that the Au/IPPA SAM, but not the underivatized Au, adsorbs Mn 4O 4(Ph 2PO 2) 6 from solution by a phosphinate exchange reaction to yield Au/IPPA/Mn 4O 4(Ph 2PO 2) 5 SAM. The resulting SAM is firmly bound and not removed by sonication, as confirmed by manganese XPS (Mn 2p 1/2) and by AFM. Electrochemistry confirms that Mn 4O 4(Ph 2-PO 2) 6 is anchored on the Au/IPPA surface and that redox chemistry can be mediated between the electrode and the surface-attached complex. Mn 4O 4(Ph 2PO 2) 6 contains the reactive Mn 4O 4 6+ cubane core, a redox-active bioinspired catalyst.",
author = "Ying Yu and Manish Dubey and Bernasek, {Steven L.} and Dismukes, {G Charles}",
year = "2007",
month = "7",
day = "17",
doi = "10.1021/la062785d",
language = "English",
volume = "23",
pages = "8257--8263",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "15",

}

TY - JOUR

T1 - Self-assembled monolayer of organic iodine on a Au surface for attachment of redox-active metal clusters

AU - Yu, Ying

AU - Dubey, Manish

AU - Bernasek, Steven L.

AU - Dismukes, G Charles

PY - 2007/7/17

Y1 - 2007/7/17

N2 - The attachment of a bifunctional iodo-organo-phosphinate compound to gold (Au) surfaces via. chemisorption of the iodine atom is described and used to chelate a redox-active metal cluster via the phosphinate group. XPS, AFM, and electrochemical measurements show that (4-iodo-phenyl)phenyl phosphinic acid (IPPA) forms a tightly bound self-assembled monolayer (SAM) on Au surfaces. The surface coverage of an IPPA monolayer on Au was quantified by an electrochemical method and found to be 0.40 ± 0.03 nmol/cm 2, roughly corresponding to 0.4 monolayers. We show that the Au/IPPA SAM, but not the underivatized Au, adsorbs Mn 4O 4(Ph 2PO 2) 6 from solution by a phosphinate exchange reaction to yield Au/IPPA/Mn 4O 4(Ph 2PO 2) 5 SAM. The resulting SAM is firmly bound and not removed by sonication, as confirmed by manganese XPS (Mn 2p 1/2) and by AFM. Electrochemistry confirms that Mn 4O 4(Ph 2-PO 2) 6 is anchored on the Au/IPPA surface and that redox chemistry can be mediated between the electrode and the surface-attached complex. Mn 4O 4(Ph 2PO 2) 6 contains the reactive Mn 4O 4 6+ cubane core, a redox-active bioinspired catalyst.

AB - The attachment of a bifunctional iodo-organo-phosphinate compound to gold (Au) surfaces via. chemisorption of the iodine atom is described and used to chelate a redox-active metal cluster via the phosphinate group. XPS, AFM, and electrochemical measurements show that (4-iodo-phenyl)phenyl phosphinic acid (IPPA) forms a tightly bound self-assembled monolayer (SAM) on Au surfaces. The surface coverage of an IPPA monolayer on Au was quantified by an electrochemical method and found to be 0.40 ± 0.03 nmol/cm 2, roughly corresponding to 0.4 monolayers. We show that the Au/IPPA SAM, but not the underivatized Au, adsorbs Mn 4O 4(Ph 2PO 2) 6 from solution by a phosphinate exchange reaction to yield Au/IPPA/Mn 4O 4(Ph 2PO 2) 5 SAM. The resulting SAM is firmly bound and not removed by sonication, as confirmed by manganese XPS (Mn 2p 1/2) and by AFM. Electrochemistry confirms that Mn 4O 4(Ph 2-PO 2) 6 is anchored on the Au/IPPA surface and that redox chemistry can be mediated between the electrode and the surface-attached complex. Mn 4O 4(Ph 2PO 2) 6 contains the reactive Mn 4O 4 6+ cubane core, a redox-active bioinspired catalyst.

UR - http://www.scopus.com/inward/record.url?scp=34547332923&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547332923&partnerID=8YFLogxK

U2 - 10.1021/la062785d

DO - 10.1021/la062785d

M3 - Article

VL - 23

SP - 8257

EP - 8263

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 15

ER -