Formation and structure of self-assembled monolayers of octylthioacetates on Au(111) in catalytic tetrabutylammonium cyanide solution

Taesung Park, Hungu Kang, Inchang Choi, Hoeil Chung, Eisuke Ito, Masahiko Hara, Jaegeun Noh

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The formation and structure of self-assembled monolayers (SAMs) by the adsorption of acetyl-protected octylthioacetate (OTA) on Au(111) in a catalytic tetrabutylammonium cyanide (TBACN) solution were examined by means of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Molecular-scale STM imaging revealed that OTA molecules on Au(111) in a pure solvent form disordered SAMs, whereas they form well-ordered SAMs showing a c(4 × 2) structure in a catalytic TBACN solution. XPS and CV measurements also revealed that OTA SAMs on Au(111) formed in a TBACN solution have a stronger chemisorbed peak in the S 2p region at 162 eV and a higher blocking effect compared to OTA SAMs formed in a pure solvent. In this study, we clearly demonstrate that TBACN can be used as an effective deprotecting reagent for obtaining well-ordered SAMs of thioacetyl-protected molecules on gold.

Original languageEnglish
Pages (from-to)441-444
Number of pages4
JournalBulletin of the Korean Chemical Society
Volume30
Issue number2
DOIs
StatePublished - 2009 Feb 20

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Self assembled monolayers
Scanning tunneling microscopy
Cyclic voltammetry
X ray photoelectron spectroscopy
Molecules
Gold
tetrabutylammonium
Imaging techniques
Adsorption

Keywords

  • Octylthioacetate
  • Scanning tunneling microscopy
  • Self-assembled monolayers
  • Tetrabutylammonium cyanide
  • X-ray photoelectron spectroscopy

Cite this

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title = "Formation and structure of self-assembled monolayers of octylthioacetates on Au(111) in catalytic tetrabutylammonium cyanide solution",
abstract = "The formation and structure of self-assembled monolayers (SAMs) by the adsorption of acetyl-protected octylthioacetate (OTA) on Au(111) in a catalytic tetrabutylammonium cyanide (TBACN) solution were examined by means of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Molecular-scale STM imaging revealed that OTA molecules on Au(111) in a pure solvent form disordered SAMs, whereas they form well-ordered SAMs showing a c(4 × 2) structure in a catalytic TBACN solution. XPS and CV measurements also revealed that OTA SAMs on Au(111) formed in a TBACN solution have a stronger chemisorbed peak in the S 2p region at 162 eV and a higher blocking effect compared to OTA SAMs formed in a pure solvent. In this study, we clearly demonstrate that TBACN can be used as an effective deprotecting reagent for obtaining well-ordered SAMs of thioacetyl-protected molecules on gold.",
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Formation and structure of self-assembled monolayers of octylthioacetates on Au(111) in catalytic tetrabutylammonium cyanide solution. / Park, Taesung; Kang, Hungu; Choi, Inchang; Chung, Hoeil; Ito, Eisuke; Hara, Masahiko; Noh, Jaegeun.

In: Bulletin of the Korean Chemical Society, Vol. 30, No. 2, 20.02.2009, p. 441-444.

Research output: Contribution to journalArticle

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T1 - Formation and structure of self-assembled monolayers of octylthioacetates on Au(111) in catalytic tetrabutylammonium cyanide solution

AU - Park, Taesung

AU - Kang, Hungu

AU - Choi, Inchang

AU - Chung, Hoeil

AU - Ito, Eisuke

AU - Hara, Masahiko

AU - Noh, Jaegeun

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AB - The formation and structure of self-assembled monolayers (SAMs) by the adsorption of acetyl-protected octylthioacetate (OTA) on Au(111) in a catalytic tetrabutylammonium cyanide (TBACN) solution were examined by means of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Molecular-scale STM imaging revealed that OTA molecules on Au(111) in a pure solvent form disordered SAMs, whereas they form well-ordered SAMs showing a c(4 × 2) structure in a catalytic TBACN solution. XPS and CV measurements also revealed that OTA SAMs on Au(111) formed in a TBACN solution have a stronger chemisorbed peak in the S 2p region at 162 eV and a higher blocking effect compared to OTA SAMs formed in a pure solvent. In this study, we clearly demonstrate that TBACN can be used as an effective deprotecting reagent for obtaining well-ordered SAMs of thioacetyl-protected molecules on gold.

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