الفهرس 
Chapter 1: IntroductionOnly 14 pages are availabe for public view
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Abstract
Title: Spectroscopic characterization and biological activities of
some transition metal complexes .
The thesis comprises of five chapters:
Chapter 1 includes the introduction and a literature survey on quinoline
azodye ligands, their metal complexes, electrical properties, optical properties
and potentiometric studies.
Chapter 2 concerned with the experimental work. The following ligands
(HL
n
) were prepared:
HL
HL
HL
HL
HL
1
2
3
4
5
: 5-(2-(4-methoxyphenyl)diazenyl)quinolin-8-ol.
: 5-(2-(4-methylphenyl)diazenyl)quinolin-8-ol.
: 5-(2-phenyldiazenyl)quinolin-8-ol.
: 5-(2-(4-chlorophenyl)diazenyl)quinolin-8-ol.
: 5-(2-(4-nitrophenyl)diazenyl)quinolin-8-ol.
Ru(III) complexes were prepared from the reaction of the ligands (HL
and HL
[Ru(L
n
5
) with [RuCl
)(AsPh
3
)
2
(Cl)
2
3
(AsPh
].xH
2
O.
3
)
2
CH
3
OH]. The formed complexes are trans-
The synthesized ligands and their Ru(III) complexes were investigated by
elemental analysis (C, H and N), molar conductivity measurements, magnetic
measurements, spectral studies (IR, electronic, mass,
studies (TGA), X-ray, ac conductivities and optical properties.
1
H and
13
1
, HL
C NMR), thermal
3
Chapter 3, Chapter4 and Chapter 5 include Results and Discussion
Chapter 3 includes the preparation and characterization of quinoline azodye
ligands (HL
[Ru(L
n
)(AsPh
n
3
) and their Ru(III) complexes of the type trans-
)
2
(Cl)
2
].xH
2
O by elemental analysis, IR and UV-Vis. spectra as
well as Magnetic susceptibility, electrical conductivity, X-ray and thermal
measurements. The molar conductance measurements proved that all the
complexes are non-electrolyte. IR spectra show that the ligands (HL
monobasic bidentate ligand by coordinating via the nitrogen atom of the
azomethine group (C=N) and oxygen atom of the phenolic OH group with the
displacement of the hydrogen atom from the later group, thereby forming a
five-membered chelating ring and concomitant formation of an intramolecular
hydrogen bond. The calf thymus DNA binding activity of the ligands (HL
HL
3
and
HL
5
) and their Ru(III) complexes (1-3) were studied by absorption
spectra. The antibacterial activities of the investigated compounds were tested
against two local Gram positive bacterial species (Bacillus cereus and
Staphylococcus aureus) and two local Gram negative bacterial species
(Escherichia coli and Klebsiella pneumoniae) on nutrient agar medium.
Also, the antifungal activities were tested against four local fungal species
(Aspergillus niger, Alternaria alternata, Penicillium italicum and Fusarium
oxysporium) on DOX agar medium. The mechanism and the catalytic
oxidation of cyclohexanol by trans[Ru(L
n
)(AsPh
3
)
2
(Cl)
2
].xH
2
n
) act as a
O with periodic
as co-oxidant were described. The molecular and electronic structures of the
1
, investigated compounds (HL
n
) were also studied using quantum chemical
calculations. The optimized bond lengths, bond angles and calculated the
quantum chemical parameters for the ligands (HL
n
) were investigated.
Chapter 4 included the proton-ligand dissociation constant of the ligands
(HL
n
) and their metal-ligand stability constants with (Mn(II), Co(II), Ni(II)
and Cu(II) have been determined potentiometrically. The potentiometric
studies were carried out in 1M (KCl) and 50% (v/v) DMF-water mixture. The
effect of temperature was studied at (298, 308 and 318 K) and the
corresponding thermodynamic parameters (G, H and S) were derived and
discussed. The stability constants of the formed complexes increases in the order
Mn(II), Co(II), Ni(II) and Cu(II). The dissociation process is non-
spontaneous, endothermic and entropically unfavorable. The formation of the
metal complexes has been found to be spontaneous, endothermic and
entropically favorable.
Chapter 5 describes the ac conductivity (σ
ligands (HL
n
) in the frequency range 10
2
ac
–10
) and dielectrical properties of the
5
Hz and temperature range 293–
509 K. The temperature and frequency dependence of the real and the
imaginary dielectrical constants are studied. The values of the thermal
activation energies of electrical conductivity (E
1
and E
2
) for derivatives
under investigation were calculated and found to be in the range of 0.03-0.26
and 0.2-1.31 eV, respectively, depending on the substituent and frequency.
The conductivities are found to be dependent on the structure of the compounds. The conduction mechanism was investigated for all the
derivatives under investigation. The ligands (HL
1
, HL
2
and HL
to be controlled by correlated barrier hopping model and the ligands (HL
HL
5
) be controlled by small polaron tunneling mechanism. The values of
maximum barrier height (W
m
) were calculated.
The optical absorption properties of the ligands thin films were investigated.
The absorption coefficient (α) spectra reveals two absorption peaks which are
assigned as π-π
*
and n-π
*
transitions. The optical energy gap (E
investigated near the absorption edge and found to be in the range of 1.34-
2.26 and 1.47-1.69 eV for direct and indirect optical transitions, respectively.
4
) were found
g
3
and
) was