Electrochemical SERS study on a copper electrode of the insoluble organic pigment Quinacridone Quinone using Ionic Liquids (BMIMCl and TBAN) as dispersing agents

Elena del Puerto, Angel Cuesta, Santiago Sanchez-Cortes, Jose V. Garcia-Ramos, Concepcion Domingo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

top
SERS detection of quinacridone quinone (QAQ), an insoluble synthetic organic pigment relevant to modern artworks, is reported here. The use of ionic liquids (BMIMCl and TBAN) as dispersing agents has allowed us to carry out electrochemical SERS experiments of QAQ in aqueous solution using a Cu electrode. No SERS spectra were obtained either from the ionic liquids (ILs) or from QAQ when silver/gold colloids were employed. The spectra of the Cu electrode in 0.1 M KCl aqueous solutions containing either BMIMCl or TBAN indicate that the corresponding cations approach the metal surface through formation of an ion pair with specifically adsorbed Cl−, but the corresponding cyclic voltammograms only show reduction and oxidation of the Cu surface. In the case of QAQ dispersed in BMIMCl and TBAN, two different SERS spectra due to QAQ species are observed between −0.4 and −1.0 V. One of the spectra agrees with the SERS of QAQ previously reported by us, using calixarenes as dispersing agents and silver colloids as SERS substrates. The other spectrum reveals a reallocation of the charge of the QAQ molecule, concomitant with a change in its relative orientation to the Cu surface. The SERS detection of QAQ is free from interferences of bands corresponding to the ILs.
Original languageEnglish
Pages (from-to)4670-4676
Number of pages7
JournalAnalyst
Volume138
Issue number16
Early online date24 May 2013
DOIs
Publication statusPublished - 21 Aug 2013

Fingerprint

Ionic Liquids
Ionic liquids
Pigments
pigment
Copper
Electrodes
electrode
Coloring Agents
copper
Colloids
Silver
colloid
silver
aqueous solution
Gold
Positive ions
Oxidation
Molecules
Calixarenes
Ions

Cite this

Electrochemical SERS study on a copper electrode of the insoluble organic pigment Quinacridone Quinone using Ionic Liquids (BMIMCl and TBAN) as dispersing agents. / del Puerto, Elena; Cuesta, Angel; Sanchez-Cortes, Santiago; Garcia-Ramos, Jose V.; Domingo, Concepcion.

In: Analyst, Vol. 138, No. 16, 21.08.2013, p. 4670-4676.

Research output: Contribution to journalArticle

del Puerto, Elena ; Cuesta, Angel ; Sanchez-Cortes, Santiago ; Garcia-Ramos, Jose V. ; Domingo, Concepcion. / Electrochemical SERS study on a copper electrode of the insoluble organic pigment Quinacridone Quinone using Ionic Liquids (BMIMCl and TBAN) as dispersing agents. In: Analyst. 2013 ; Vol. 138, No. 16. pp. 4670-4676.
@article{0c3e05fd901e4e4b8a06526d3c944c39,
title = "Electrochemical SERS study on a copper electrode of the insoluble organic pigment Quinacridone Quinone using Ionic Liquids (BMIMCl and TBAN) as dispersing agents",
abstract = "topSERS detection of quinacridone quinone (QAQ), an insoluble synthetic organic pigment relevant to modern artworks, is reported here. The use of ionic liquids (BMIMCl and TBAN) as dispersing agents has allowed us to carry out electrochemical SERS experiments of QAQ in aqueous solution using a Cu electrode. No SERS spectra were obtained either from the ionic liquids (ILs) or from QAQ when silver/gold colloids were employed. The spectra of the Cu electrode in 0.1 M KCl aqueous solutions containing either BMIMCl or TBAN indicate that the corresponding cations approach the metal surface through formation of an ion pair with specifically adsorbed Cl−, but the corresponding cyclic voltammograms only show reduction and oxidation of the Cu surface. In the case of QAQ dispersed in BMIMCl and TBAN, two different SERS spectra due to QAQ species are observed between −0.4 and −1.0 V. One of the spectra agrees with the SERS of QAQ previously reported by us, using calixarenes as dispersing agents and silver colloids as SERS substrates. The other spectrum reveals a reallocation of the charge of the QAQ molecule, concomitant with a change in its relative orientation to the Cu surface. The SERS detection of QAQ is free from interferences of bands corresponding to the ILs.",
author = "{del Puerto}, Elena and Angel Cuesta and Santiago Sanchez-Cortes and Garcia-Ramos, {Jose V.} and Concepcion Domingo",
year = "2013",
month = "8",
day = "21",
doi = "10.1039/C3AN00446E",
language = "English",
volume = "138",
pages = "4670--4676",
journal = "Analyst",
issn = "0003-2654",
publisher = "ROYAL SOC CHEMISTRY",
number = "16",

}

TY - JOUR

T1 - Electrochemical SERS study on a copper electrode of the insoluble organic pigment Quinacridone Quinone using Ionic Liquids (BMIMCl and TBAN) as dispersing agents

AU - del Puerto, Elena

AU - Cuesta, Angel

AU - Sanchez-Cortes, Santiago

AU - Garcia-Ramos, Jose V.

AU - Domingo, Concepcion

PY - 2013/8/21

Y1 - 2013/8/21

N2 - topSERS detection of quinacridone quinone (QAQ), an insoluble synthetic organic pigment relevant to modern artworks, is reported here. The use of ionic liquids (BMIMCl and TBAN) as dispersing agents has allowed us to carry out electrochemical SERS experiments of QAQ in aqueous solution using a Cu electrode. No SERS spectra were obtained either from the ionic liquids (ILs) or from QAQ when silver/gold colloids were employed. The spectra of the Cu electrode in 0.1 M KCl aqueous solutions containing either BMIMCl or TBAN indicate that the corresponding cations approach the metal surface through formation of an ion pair with specifically adsorbed Cl−, but the corresponding cyclic voltammograms only show reduction and oxidation of the Cu surface. In the case of QAQ dispersed in BMIMCl and TBAN, two different SERS spectra due to QAQ species are observed between −0.4 and −1.0 V. One of the spectra agrees with the SERS of QAQ previously reported by us, using calixarenes as dispersing agents and silver colloids as SERS substrates. The other spectrum reveals a reallocation of the charge of the QAQ molecule, concomitant with a change in its relative orientation to the Cu surface. The SERS detection of QAQ is free from interferences of bands corresponding to the ILs.

AB - topSERS detection of quinacridone quinone (QAQ), an insoluble synthetic organic pigment relevant to modern artworks, is reported here. The use of ionic liquids (BMIMCl and TBAN) as dispersing agents has allowed us to carry out electrochemical SERS experiments of QAQ in aqueous solution using a Cu electrode. No SERS spectra were obtained either from the ionic liquids (ILs) or from QAQ when silver/gold colloids were employed. The spectra of the Cu electrode in 0.1 M KCl aqueous solutions containing either BMIMCl or TBAN indicate that the corresponding cations approach the metal surface through formation of an ion pair with specifically adsorbed Cl−, but the corresponding cyclic voltammograms only show reduction and oxidation of the Cu surface. In the case of QAQ dispersed in BMIMCl and TBAN, two different SERS spectra due to QAQ species are observed between −0.4 and −1.0 V. One of the spectra agrees with the SERS of QAQ previously reported by us, using calixarenes as dispersing agents and silver colloids as SERS substrates. The other spectrum reveals a reallocation of the charge of the QAQ molecule, concomitant with a change in its relative orientation to the Cu surface. The SERS detection of QAQ is free from interferences of bands corresponding to the ILs.

U2 - 10.1039/C3AN00446E

DO - 10.1039/C3AN00446E

M3 - Article

VL - 138

SP - 4670

EP - 4676

JO - Analyst

JF - Analyst

SN - 0003-2654

IS - 16

ER -