Soft-landing isolation of vanadium-benzene sandwich clusters on a room-temperature substrate using n-alkanethiolate self-assembled monolayer matrixes

Masaaki Mitsui, Shuhei Nagaoka, Takeshi Matsumoto, Atsushi Nakajima

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

Gas-phase synthesized vanadium-benzene 1:2 (VBz2) sandwich clusters were size-selectively deposited onto bare gold and long-chain n-alkanethiolate [-S-(CH2)n-1-CH3; n = 16, 18, and 22] self-assembled monolayer (SAM)-coated gold substrates under ultrahigh vacuum (UHV) conditions. Investigation of the resulting deposited clusters was performed by infrared reflection absorption spectroscopy (IRAS) and thermal desorption spectroscopy (TDS). The IR frequencies of the soft-landed VBz 2 clusters show excellent agreement with the fundamentals reported in IR data of VBz2 in an argon matrix. The analysis of IRAS spectra reveals that while there was no orientational preference of the VBz2 clusters on a bare gold substrate, the VBz2 clusters deposited onto the SAM substrates were highly oriented with the molecular axis 70-80° tilted off the surface normal. In addition, analysis of TDS spectra revealed unusually large adsorption heats of the physisorbed VBz2 clusters. The present results are explained by cluster penetration into the long-chain alkanethiolate SAM and for the first time demonstrate the matrix isolation of gas-phase organometallic clusters around room temperature.

Original languageEnglish
Pages (from-to)2968-2971
Number of pages4
JournalJournal of Physical Chemistry B
Volume110
Issue number7
DOIs
Publication statusPublished - 2006 Feb 23

Fingerprint

soft landing
Vanadium
Self assembled monolayers
Benzene
Landing
vanadium
isolation
benzene
Gold
Thermal desorption spectroscopy
room temperature
Substrates
matrices
Absorption spectroscopy
Temperature
Gases
infrared reflection
Infrared radiation
gold
Argon

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Soft-landing isolation of vanadium-benzene sandwich clusters on a room-temperature substrate using n-alkanethiolate self-assembled monolayer matrixes. / Mitsui, Masaaki; Nagaoka, Shuhei; Matsumoto, Takeshi; Nakajima, Atsushi.

In: Journal of Physical Chemistry B, Vol. 110, No. 7, 23.02.2006, p. 2968-2971.

Research output: Contribution to journalArticle

@article{85f457d773da4422a8e00a30e806bf2c,
title = "Soft-landing isolation of vanadium-benzene sandwich clusters on a room-temperature substrate using n-alkanethiolate self-assembled monolayer matrixes",
abstract = "Gas-phase synthesized vanadium-benzene 1:2 (VBz2) sandwich clusters were size-selectively deposited onto bare gold and long-chain n-alkanethiolate [-S-(CH2)n-1-CH3; n = 16, 18, and 22] self-assembled monolayer (SAM)-coated gold substrates under ultrahigh vacuum (UHV) conditions. Investigation of the resulting deposited clusters was performed by infrared reflection absorption spectroscopy (IRAS) and thermal desorption spectroscopy (TDS). The IR frequencies of the soft-landed VBz 2 clusters show excellent agreement with the fundamentals reported in IR data of VBz2 in an argon matrix. The analysis of IRAS spectra reveals that while there was no orientational preference of the VBz2 clusters on a bare gold substrate, the VBz2 clusters deposited onto the SAM substrates were highly oriented with the molecular axis 70-80° tilted off the surface normal. In addition, analysis of TDS spectra revealed unusually large adsorption heats of the physisorbed VBz2 clusters. The present results are explained by cluster penetration into the long-chain alkanethiolate SAM and for the first time demonstrate the matrix isolation of gas-phase organometallic clusters around room temperature.",
author = "Masaaki Mitsui and Shuhei Nagaoka and Takeshi Matsumoto and Atsushi Nakajima",
year = "2006",
month = "2",
day = "23",
doi = "10.1021/jp057194v",
language = "English",
volume = "110",
pages = "2968--2971",
journal = "Journal of Physical Chemistry B Materials",
issn = "1520-6106",
publisher = "American Chemical Society",
number = "7",

}

TY - JOUR

T1 - Soft-landing isolation of vanadium-benzene sandwich clusters on a room-temperature substrate using n-alkanethiolate self-assembled monolayer matrixes

AU - Mitsui, Masaaki

AU - Nagaoka, Shuhei

AU - Matsumoto, Takeshi

AU - Nakajima, Atsushi

PY - 2006/2/23

Y1 - 2006/2/23

N2 - Gas-phase synthesized vanadium-benzene 1:2 (VBz2) sandwich clusters were size-selectively deposited onto bare gold and long-chain n-alkanethiolate [-S-(CH2)n-1-CH3; n = 16, 18, and 22] self-assembled monolayer (SAM)-coated gold substrates under ultrahigh vacuum (UHV) conditions. Investigation of the resulting deposited clusters was performed by infrared reflection absorption spectroscopy (IRAS) and thermal desorption spectroscopy (TDS). The IR frequencies of the soft-landed VBz 2 clusters show excellent agreement with the fundamentals reported in IR data of VBz2 in an argon matrix. The analysis of IRAS spectra reveals that while there was no orientational preference of the VBz2 clusters on a bare gold substrate, the VBz2 clusters deposited onto the SAM substrates were highly oriented with the molecular axis 70-80° tilted off the surface normal. In addition, analysis of TDS spectra revealed unusually large adsorption heats of the physisorbed VBz2 clusters. The present results are explained by cluster penetration into the long-chain alkanethiolate SAM and for the first time demonstrate the matrix isolation of gas-phase organometallic clusters around room temperature.

AB - Gas-phase synthesized vanadium-benzene 1:2 (VBz2) sandwich clusters were size-selectively deposited onto bare gold and long-chain n-alkanethiolate [-S-(CH2)n-1-CH3; n = 16, 18, and 22] self-assembled monolayer (SAM)-coated gold substrates under ultrahigh vacuum (UHV) conditions. Investigation of the resulting deposited clusters was performed by infrared reflection absorption spectroscopy (IRAS) and thermal desorption spectroscopy (TDS). The IR frequencies of the soft-landed VBz 2 clusters show excellent agreement with the fundamentals reported in IR data of VBz2 in an argon matrix. The analysis of IRAS spectra reveals that while there was no orientational preference of the VBz2 clusters on a bare gold substrate, the VBz2 clusters deposited onto the SAM substrates were highly oriented with the molecular axis 70-80° tilted off the surface normal. In addition, analysis of TDS spectra revealed unusually large adsorption heats of the physisorbed VBz2 clusters. The present results are explained by cluster penetration into the long-chain alkanethiolate SAM and for the first time demonstrate the matrix isolation of gas-phase organometallic clusters around room temperature.

UR - http://www.scopus.com/inward/record.url?scp=33644909327&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33644909327&partnerID=8YFLogxK

U2 - 10.1021/jp057194v

DO - 10.1021/jp057194v

M3 - Article

C2 - 16494294

AN - SCOPUS:33644909327

VL - 110

SP - 2968

EP - 2971

JO - Journal of Physical Chemistry B Materials

JF - Journal of Physical Chemistry B Materials

SN - 1520-6106

IS - 7

ER -