Studies of femtosecond time-resolved photoelectron spectroscopy of Au 3 - (H 2O) m clusters: Alteration of cluster relaxation dynamics of metal clusters by water molecules

Christian Braun; Sebastian Proch; Hyun Ook Seo; Young Dok Kim; Gerd Ganteför

doi:10.1016/j.cplett.2012.01.078

Studies of femtosecond time-resolved photoelectron spectroscopy of Au 3 - (H ₂O) _m clusters: Alteration of cluster relaxation dynamics of metal clusters by water molecules

Christian Braun, Sebastian Proch, Hyun Ook Seo, Young Dok Kim, Gerd Ganteför

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Relaxation dynamics of optically excited states of Au3- and Au3-(H ₂O) _m were studied via femtosecond time-resolved photoelectron spectroscopy (fsTRPES). Au3- exhibits photo-dissociation into either (Au2- + Au ₁) or (Au ₂ + Au1-) with a time constant of 1.6 ns. One water molecule adsorbed on Au3- opened new photo-induced dissociation channel with a much shorter time constant. More than one water molecule on Au3- inhibited photo-dissociation, most likely as a result of facile dissipation of excess energy of optically excited states by nuclear motions of clusters. The photochemical pathway can be controlled by adjusting the number of water molecules interacting with the ionic species.

Original language	English
Pages (from-to)	35-38
Number of pages	4
Journal	Chemical Physics Letters
Volume	530
DOIs	https://doi.org/10.1016/j.cplett.2012.01.078
State	Published - 19 Mar 2012

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10.1016/j.cplett.2012.01.078

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title = "Studies of femtosecond time-resolved photoelectron spectroscopy of Au 3 - (H 2O) m clusters: Alteration of cluster relaxation dynamics of metal clusters by water molecules",

abstract = "Relaxation dynamics of optically excited states of Au3- and Au3-(H 2O) m were studied via femtosecond time-resolved photoelectron spectroscopy (fsTRPES). Au3- exhibits photo-dissociation into either (Au2- + Au 1) or (Au 2 + Au1-) with a time constant of 1.6 ns. One water molecule adsorbed on Au3- opened new photo-induced dissociation channel with a much shorter time constant. More than one water molecule on Au3- inhibited photo-dissociation, most likely as a result of facile dissipation of excess energy of optically excited states by nuclear motions of clusters. The photochemical pathway can be controlled by adjusting the number of water molecules interacting with the ionic species.",

author = "Christian Braun and Sebastian Proch and Seo, \{Hyun Ook\} and Kim, \{Young Dok\} and Gerd Gantef{\"o}r",

year = "2012",

month = mar,

day = "19",

doi = "10.1016/j.cplett.2012.01.078",

language = "English",

volume = "530",

pages = "35--38",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

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T1 - Studies of femtosecond time-resolved photoelectron spectroscopy of Au 3 - (H 2O) m clusters

T2 - Alteration of cluster relaxation dynamics of metal clusters by water molecules

AU - Braun, Christian

AU - Proch, Sebastian

AU - Seo, Hyun Ook

AU - Kim, Young Dok

AU - Ganteför, Gerd

PY - 2012/3/19

Y1 - 2012/3/19

N2 - Relaxation dynamics of optically excited states of Au3- and Au3-(H 2O) m were studied via femtosecond time-resolved photoelectron spectroscopy (fsTRPES). Au3- exhibits photo-dissociation into either (Au2- + Au 1) or (Au 2 + Au1-) with a time constant of 1.6 ns. One water molecule adsorbed on Au3- opened new photo-induced dissociation channel with a much shorter time constant. More than one water molecule on Au3- inhibited photo-dissociation, most likely as a result of facile dissipation of excess energy of optically excited states by nuclear motions of clusters. The photochemical pathway can be controlled by adjusting the number of water molecules interacting with the ionic species.

AB - Relaxation dynamics of optically excited states of Au3- and Au3-(H 2O) m were studied via femtosecond time-resolved photoelectron spectroscopy (fsTRPES). Au3- exhibits photo-dissociation into either (Au2- + Au 1) or (Au 2 + Au1-) with a time constant of 1.6 ns. One water molecule adsorbed on Au3- opened new photo-induced dissociation channel with a much shorter time constant. More than one water molecule on Au3- inhibited photo-dissociation, most likely as a result of facile dissipation of excess energy of optically excited states by nuclear motions of clusters. The photochemical pathway can be controlled by adjusting the number of water molecules interacting with the ionic species.

UR - https://www.scopus.com/pages/publications/84862796900

U2 - 10.1016/j.cplett.2012.01.078

DO - 10.1016/j.cplett.2012.01.078

M3 - Article

AN - SCOPUS:84862796900

SN - 0009-2614

VL - 530

SP - 35

EP - 38

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Studies of femtosecond time-resolved photoelectron spectroscopy of Au 3 - (H ₂O) _m clusters: Alteration of cluster relaxation dynamics of metal clusters by water molecules

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