الفهرس 
GENERAL INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Summary
The current study involves two sections: the first section is
concerned with the synthesis and characterization of different
group 8B metal-Schiff base complexes. These complexes
have been examined for their antimicrobial activities against
the growth of various strains of bacteria. The second section
involves the implementation of the prepared complexes in
the fabrication of chemical sensors, which were found ideal
for detection of iodide ions in real samples. The results have
validated the sensors to be successfully implemented as
indicator electrodes in analytical applications for detection of
the iodide ions in real samples.
Chapter one: This chapter reviews general concepts of
potentiometry, the basic theory of chemical sensors,
historical background, characteristics, and classification of
potentiometric sensors with particular emphasis on ionselective
electrodes.
Chapter two: This chapter involves the synthesis of
novel mononuclear Fe(III), Ru(III) and Ru(I) complexes as
the result of the reactions of the corresponding metal chloride
salt (FeCl3 and RuCl3) as well as the metal carbonyl
Summary
II
(Ru3(CO)12) with neutral N2O2 donor tetradentate Schiff
bases namely: N,N′-bis(salicylidene)-1,2-phenylenediamine
and (R,R)-(−)-N,N′-Bis(3,5-di-tert-butylsalicylidene)-1,2-
cyclohexanediamine (H2L2), The prepared complexes have
been characterized by various analytical techniques including
elemental analyses (CHN), FT-IR, ESR, UV–Vis spectra and
thermal studies. All the complexes are colored, stable in air
and were found to be water-insoluble but soluble in polar
solvents like DMF and DMSO. The analytical data obtained
suggested a stoichiometry of metal: ligand ratio of 1:1 for all
of prepared complexes. All the complexes have octahedral
geometry. Some of the prepared complexes have electrolytic
nature, which came in accordance with the proposed
structure revealing the ionic nature of the complexes, while
others have non-ionic nature. The melting points of the
complexes were higher than that of the ligands indicating that
the complexes are much more stable than the ligands. Fe(III)
and Ru(III) complexes of the Schiff base (H2L1) exhibited
antibacterial activity unlike that of the other Schiff
base(H2L2) relative to the standard drugs, while Ru(I)
complex with H2L1 has exhibited very high antibacterial
activity relative to the other complexes.
Summary
III
Chapter three: This chapter depicts the fabrication of
polymeric membrane electrodes based on the previously
prepared Schiff base-metal ion complexes of Iron(III) and
Ruthenium(III) using various membrane compositions of
polymer matrix (e.g., polyvinyl chloride, polyurethane),
plasticizers (e.g., NPOE, DOS) and ionic additives (e.g.,
TDMAC, TFPB…etc.). In addition, this chapter also
involves the potentiometric response characteristic of these
novel selective liquid/polymeric membrane electrodes
towards iodide over other anions. Furthermore, the response
characteristics of such sensors, namely: selectivity, response
time, life time, potentiometric signal reversibility and the pH
effect were all investigated and optimized to achieve the best
performance. The operative response mechanism of the
optimized sensor towards the selective anion was also
studied and established. The results showed that the
optimized electrode exhibited linear response over wide
range of concentrations and pH values. The analytical
applications of the optimized electrode were performed
successfully by determination of iodide content in real
samples and the results obtained were in good agreement
with standard potentiometric method