RT info:eu-repo/semantics/article
T1 Simplifying the assessment of parameters of electron-transfer reactions by using easy-to-use thin-layer spectroelectrochemistry devices
A1 Garoz Ruiz, Jesús
A1 Guillen Posteguillo, Carlos
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 Thin-layer
K1 Spectroelectrochemistry
K1 Bare optical fibers
K1 Carbon nanotubes
K1 Screen-printed electrodes
K1 Química analítica
K1 Chemistry, Analytic
AB UV–Vis absorption thin-layer spectroelectrochemistry greatly contributes to the assessment of parameters of electron-transfer reactions by providing electrochemical and spectroscopic information obtained simultaneously in a confined space around the working electrode. In this work we present an ingenious modification of a spectroelectrochemistry device based on carbon nanotubes and bare optical fibers to perform UV–Vis absorption thin-layer spectroelectrochemistry measurements. The working and counter electrodes are made of carbon nanotubes filtered and press-transferred onto a flat support where a painted silver line acts as pseudo-reference electrode. To perform high sensitivity measurements, two bare optical fibers are fixed to the support in a parallel arrangement. In a novel development, a quartz plate is placed on top of the bare optical fibers in order to create a thin layer whose thickness is reproducibly controlled by the diameter of the optical fibers. This methodology is also successfully applied using commercial screen-printed electrodes. Three different electroactive compounds, ferrocenemethanol, o-tolidine and [Ru(bpy)3]2 +, are studied and good results are obtained. As demonstrated below, these long optical path UV–Vis absorption thin-layer spectroelectrochemistry cells considerably reduce the complexity associated with this type of devices, eliminating one of the major disadvantages of this technique and making it much more accessible to the scientific community.
PB Elsevier
SN 1388-2481
YR 2018
FD 2018-01
LK http://hdl.handle.net/10259/4943
UL http://hdl.handle.net/10259/4943
LA eng
NO Ministerio de Economía y Competitividad (CTQ2014-55583-R, CTQ2014-61914-EXP, CTQ2015-71955-REDT) and Junta de Castilla y León (BU033-U16)
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024