Page 50 - Book of Invited & Keynotes Talks

th
8 Biannual Conference on Chemistry - CHEM 08

In-situ Multi Spectroelectrochemistry:
From Design to Applications and Selected works on
Ruthenium/Nickel electrochemistry with Different Ligands

Mohammad S. El-Shahawi *, Waqas Ahmad, Ranyah M. Bashami
1
1
1, 2
1 Department of Chemistry, Faculty of Science, King Abdulaziz University.
P.O. Box80203, Jeddah 21589, Saudi Arabia, School of Food and Biological
2
Engineering, Jiangsu University, Zhenjiang 212013, P.R. China

ABSTRACT
The integration of reaction-oriented conventional electrochemistry with
species focused spectroscopy constitutes spectroelectrochemistry (SEC) that
administer a complete portrayal of chemically triggered redox reactions for
single and multiple electron-transfer processes. SEC probes interdisciplinary
scopes and applications to farther discover the redox nature in the arena of
materials science, chemical biology, the hot issues of analytical chemistry
and so on. In the first segment, the design of optically transparent thin layer
electrochemical (OTTLE) cells will be illustrated. Second, the current stature,
contextual history and state-of-the-art recent progress with selected cases
concerning UV-Visible (UV-Vis), Fourier transform/near-infrared (FT-
IR/NIR), electron paramagnetic resonance (EPR), surface-enhanced Raman
spectroscopy (SERS), fluorescence will be reviewed. Furthermore, to some
extent, an illustration of a typical SEC in sensing mechanism will also be
examined. Additionally, examples from our groups' research work in
electrochemical and spectroelectrochemical characterizations of some new
and previously identified ruthenium and nickel complexes with bypyridine,
diphenylphosphino-benzene (dppbz), diphenylphosphino- ferrocene (dppf)
and Schiff base ligands will be covered. The work will oversee cyclic
voltammetric retrospection of the electron transfer reaction mechanism of
the complexes, metal and multiple ligand-based oxidation-reduction steps.
The essence of the OTTLE spectropotentiostatic practice, test the
reversibility of these complexes and its applications as switching materials,
which imply its facilitation for the acquisition of spectral changes. Lastly,
shortcomings of SEC cell design and its modifications based on potential
applications and detailed future perspectives, trends in its development to
ultra-fast valence electron interactions will be discussed.
Keywords: Spectroelectrochemistry; Optically transparent thin layer
electrochemical cell; Ruthenium complexes; Spectropotentiostatic.

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