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The pH-Controlled Plasmon-Assisted Surface Photocatalysis Reaction of 4-Aminothiophenol to p,p '-Dimercaptoazobenzene on Au, Ag, and Cu Colloids

Sun, Mengtao; Huang, Yingzhou; Xia, Lixin; Chen, Xiaowei and Xu, Hongxing LU (2011) In Journal of Physical Chemistry C 115(19). p.9629-9636
Abstract
In this paper, we report experimentally and theoretically a surface photocatalysis reaction of 4-aminothiophenol (PATP) to p,p'-dimercaptoazobenzene (DMAB) on Au, Ag, and Cu colloids. Surface enhanced Raman scattering (SEAS) spectra of PATP on Au and Cu colloids are significantly different from the normal Raman spectrum of PATP powder. Quantum chemical calculations reveal that PATP on Au and Cu colloids is converted to DMAB by a surface photocatalysis reaction, and all the strongly enhanced Raman peaks are the symmetric Ag vibrational mode by surface plasmon. The pH value effects on surface photocatalysis reaction were also investigated experimentally. It is found that plasmon-assisted surface photocatalysis reaction can be efficiently... (More)
In this paper, we report experimentally and theoretically a surface photocatalysis reaction of 4-aminothiophenol (PATP) to p,p'-dimercaptoazobenzene (DMAB) on Au, Ag, and Cu colloids. Surface enhanced Raman scattering (SEAS) spectra of PATP on Au and Cu colloids are significantly different from the normal Raman spectrum of PATP powder. Quantum chemical calculations reveal that PATP on Au and Cu colloids is converted to DMAB by a surface photocatalysis reaction, and all the strongly enhanced Raman peaks are the symmetric Ag vibrational mode by surface plasmon. The pH value effects on surface photocatalysis reaction were also investigated experimentally. It is found that plasmon-assisted surface photocatalysis reaction can be efficiently controlled by different pH values. The possibility of protonation of PATP adsorbed on Au and Ag nanoparticles at pH 3 is investigated theoretically. The molecular mechanism is proposed for controlling surface photocatalysis reaction by pH values. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
115
issue
19
pages
9629 - 9636
publisher
The American Chemical Society
external identifiers
  • wos:000290427400041
  • scopus:79956147536
ISSN
1932-7447
DOI
10.1021/jp201002v
language
English
LU publication?
yes
id
d66db957-3543-4a11-87a8-f4d957eddbbf (old id 1986842)
date added to LUP
2011-06-29 10:09:26
date last changed
2017-11-19 03:08:37
@article{d66db957-3543-4a11-87a8-f4d957eddbbf,
  abstract     = {In this paper, we report experimentally and theoretically a surface photocatalysis reaction of 4-aminothiophenol (PATP) to p,p'-dimercaptoazobenzene (DMAB) on Au, Ag, and Cu colloids. Surface enhanced Raman scattering (SEAS) spectra of PATP on Au and Cu colloids are significantly different from the normal Raman spectrum of PATP powder. Quantum chemical calculations reveal that PATP on Au and Cu colloids is converted to DMAB by a surface photocatalysis reaction, and all the strongly enhanced Raman peaks are the symmetric Ag vibrational mode by surface plasmon. The pH value effects on surface photocatalysis reaction were also investigated experimentally. It is found that plasmon-assisted surface photocatalysis reaction can be efficiently controlled by different pH values. The possibility of protonation of PATP adsorbed on Au and Ag nanoparticles at pH 3 is investigated theoretically. The molecular mechanism is proposed for controlling surface photocatalysis reaction by pH values.},
  author       = {Sun, Mengtao and Huang, Yingzhou and Xia, Lixin and Chen, Xiaowei and Xu, Hongxing},
  issn         = {1932-7447},
  language     = {eng},
  number       = {19},
  pages        = {9629--9636},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {The pH-Controlled Plasmon-Assisted Surface Photocatalysis Reaction of 4-Aminothiophenol to p,p '-Dimercaptoazobenzene on Au, Ag, and Cu Colloids},
  url          = {http://dx.doi.org/10.1021/jp201002v},
  volume       = {115},
  year         = {2011},
}