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Solubility Enhancement of Some Water-Insoluble Compounds by
Polysaccharides and Molecular Modeling of Inherent Intermolecular
Interactions
Mousa AL Bargothe *
Total Funding:
3900
Funded by:Hashemite
University
Acceptance Date:
12/5/2002
Duration
of Project :
24 months
ABSTRACT
The solubility enhancement of two poorly soluble drugs: risperidone
(Risp) and itraconazole (Itra) by complexation with cyclodextrins
has been investigated in aqueous medium. The various factors
influencing the solubility enhancement such as temperature, pH,
ionic strength and types of cyclodextrins have been considered.
Linear and nonlinear least squares analysis of phase solubility
diagrams of Risp and Itra with aqueous cyclodextrins have been
conducted to obtain the corresponding individual guest-host complex
formation constants. Molecular mechanics calculations using MM
(atomic charges and bond dipole algorithms) and Amber force fields
have been applied to study the complexation of cyclodextrin with
both drugs to rationalize the stoichiometry and determine the
optimal geometries of the complexes.
The complexation ability of Risp toward studied cyclodextrins is in
the order b- > HP-
b- >
g- >
a-CD. For neutral Itra the
order was HP--> - cyclodextrin. The 1 :1 complex formation
constant of Risp:HP--CD is found to increase with increase in the
phosphate buffer concentration in accord with the hydrophobic
interactions which are enhanced with the increase in the ionic
strength. Thermodynamic studies show that the 1:1 complex formation
is driven by enthalpy for both drugs, however the overall complex
(1:2 for Risp, 1:3 for Itra) is entropy driven. Complex stability is
found to vary with pH, with a higher formation constant for the
neutral species. Synergistic studies show that, although risperidone
has a high solubility at low pH but the solubility of -cyclodextrin
was enhanced remarkably, indicating the formation of complex even at
low pH. The three computational methods used in this work give
similar results concerning the structures of the inclusion
complexes. Van der Waals interactions seem to be dominant over
electrostatic interactions in neutral solute-cyclodextrin complexes.
Relaxation of the cyclodextrin macrocycle upon guest inclusion is
probably significant as a driving force for guest inclusion.
Funded Projects by
HU:
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Date of Publication |
Name of Publication |
Title of Published
Research |
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- |
- |
- |
Other Projects:
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Date of
Publication |
Name of
Publication |
Title of
Published Research |
|
2004 |
Separation Science
and Technology |
Effect of Surface
Area, Micropores, Secondary Micropores and Mesopores
Volumes of Activated Carbons on Reactive Dyes
Adsorption from Solution |
|
2004 |
Asian J. Chem |
Interactions of Some
Organic Compounds with
a-,
b- and
g-Cyclodextrins.
A Molecular Mechanics Study |
|
2004 |
Dirassat |
Evaluation of Natural Diatomite for Heavy Metals
Adsorption |
|
2003 |
Oriental J. Chem |
Molecular Mechanics
Calculations of Inclusion complexes of phenol and
benzoic acid with
b-Cylodextrin
using MM and Amber force fields
|
|
Date of
Publication |
Name of
Publication |
Title of
Published Research |
|
2003 |
Asian J. Chem |
Adsorption of
Anionic Reactive
Dyes from Solution by Activated Carbon: Effect of
Solution pH |
|
2002 |
Dirassat |
Evaluation of Commercial Activated Carbon Adsorbents
for the Removal of Reactive Dyes from Solution |
|
2000 |
J. Saudi Chem. Soc., |
Quantum Chemical
Calculations of Solvation Effects on the Electronic
Absorption Spectra of some
a,b-Unsaturated
Carbonyl Compounds |
*
Faculty:
Science and Arts
Chemistry.
* Specific Specialization :Physical
Chemistry.
Effect of additives on stability of
substituted polystyrenes in solid films and in solutions
Khalid Essa Al-Ani *
Talal AL Akhashah
Total Funding:
16600
Funded by:Hashemite
University
Acceptance Date:
22/9/1999
Duration of Project :
24 months
ABSTRACT
The fluorescence quenching of various substituted polystyrenes by
terephthalate plasticizers will be investigated in solvents of
different polarity and in solid films.
From the Stern-Volmer quenching constant and the calculated
fluorescence decay lifetime of the polymer, the values for the
quenching rate constant and quenching cross-section will be
calculated.
Funded Projects By HU:
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Date of Publication |
Name of Publication |
Title of Published
Research |
|
2003 |
accepted for publication
in Euro polym J, |
Khalid E. Al-Ani, T.
Akasheh and Y. Yousef, Decay times of poly (para-substituted
styrene) in solid films, accepted for publication in
Euro polym J, (2003). |
-Other Projects:-
|
Date of Publication |
Name of Publication |
Title of Published
Research |
|
1989; (1):916. |
1.
Al-Ani KE, photochemistry and photodegradation of
Para- substituted polystyrene in solid films.
J
Abhath
Alyarmouk1989; (1):916.
|
2.
Al-Ani KE, photochemistry and photodegradation of
Para- substituted polystyrene in solid films.
J
Abhath
Alyarmouk1989; (1):916.
|
*Faculty: Science and
Arts Chemistry.
* Specific Specialization:
Physical
Chemistry
.
Kinetics of amino acids oxidization by transition metal complexes
Hamzeh Abdel-Halim *
Adnan S. Abu-Surrah
Total Funding:
5894
Funded
by:Hashemite
University
Acceptance Date:
29/4/2001
Duration
of Project :
24 months
ABSTRACT
Kinetics of oxidation of cysteine by Co(III), Fe(III), Mn(III),
and Cr(III) based complexes with the ligands; amine (NH3),
2,2'-bipyridine (bipy), ethylenediamine (en), acetylacetonate (acac),
bromoacetylacetonate (acac-Br), nitroacetylacetonate (acac-NO2)
N,N'-bis(salicylidine)-1,2-ethylenediamine (salen),
N,N'-bis(salicylidene)-1,2-phenylenediamine (salphen) and (1R,2R)-
(-)- N,N’-bis(3,5-di-t- butyl-salicylidene) -1,2-
cyclohexyldiamine (ch-salen), have been investigated
spectrophotometrically. The measurements were done in the visible
region, under pseudo first order condition, at 25 oC, pH
= 7 and ionic strength = 0.5 M. The value of the observed rate
constant and that of the overall rate constant were determined. The
effect of different variables on the rate of the reaction was
studied. The type of the ligand has the most significant effect on
the reaction rate, followed by the geometry of the complex, the
metal center, the solvent type, and finally, the weakly coordinated
ligand. As the ligand becomes bulky, the rate increases in cobalt
complexes (bipy > en > NH3). The opposite was found for
iron complexes (bipy > salen). As the weakly coordinated ligands,
such as (acac and Cl), increases in size, the reaction rate
decreases. The metal center affects the reaction rate according to
their reduction potentials; when the reduction potential of the
metal increases, the rate of the reaction increases in the absence
of a bulky ligand such as salen. Also, it was observed that
geometric isomers affect the rate differently; the rate of oxidation
with cis- isomer is faster than that with the trans- isomer. The
solvent type also affects the rate, as it is found that the rate of
reaction in ethanol is higher than that in water. Generally, the
reaction follows an outer-sphere mechanism in the absence of a
bridging ligand; else it follows an inner-sphere mechanism. Also, it
was found that the outer-sphere configuration is faster than the
inner-sphere configuration.
Funded Projects by HU:
|
Date of
Publication |
Name of
Publication |
Title of
Published Research |
|
- |
- |
- |
Other Projects:-
|
Date of
Publication |
Name of
Publication |
Title of
Published Research |
|
2004 |
Oriental J. Chem |
“Spectroscopic
Constants of Diatomic Molecules: Theoretical
calculations Using a Morse Potential Based Model”,
Hamzeh A. Halim, Oriental J. Chem., accepted.
|
|
2002 |
Oriental J. Chem |
“Electric Field
Induced Second Harmonic Generation: Second and Third
Order Hyperpolarizabilities of 4-amino-4¢-nitrodiphenyl
sulfoxide”, Hamzeh Abdel-Halim, J. Chem. Phys., 119,
484 (2003).
|
|
2001 |
Jour. Chem. Soc.
Pak.
|
“A Model to
Calculate Vibrational-Vibrational Energy Transfer
Between Diatomic Molecules”, Hamzeh Abdel-Halim,
Oriental J. Chem., 18(2), 233 (2002)
. |
|
Date of
Publication |
Name of
Publication |
Title of
Published Research |
|
2001 |
International Jour.
Chem. |
“Kinetics of
Oxidation of L-Ascorbic Acid by Cobalt(III)
Complexes”, Hamzeh Abdel-Halim, Jour. Chem. Soc.
Pak., 23, 69 (2001). |
|
1998 |
Pak. J. Sci. Ind.
Res.
|
“Kinetics of
Oxidation of Cysteine by Cobalt(III) Complexes”,
Hamzeh Abdel-Halim, International Jour. Chem., 11,
131 (2001). |
|
1996 |
J. Chem. Phys |
“Ligand Effect on
Oxidation Rates of Cysteine by Iron(III)
Complexes", H.M. Abdel-Halim, S.B. Salama, and S.K.
Al-Burtmani, Pak. J. Sci. Ind. Res., 41, 71 (1998).
|
|
1996 |
Indian J. Chem |
“Temperature
dependence of vibrational relaxation of N2
by O2 in liquid N2 along the
coexistence curve”, Hamzeh M. Abdel-Halim, J. Chem.
Phys., 104, 6196 (1996).
|
|
1994 |
Asian J. Chem |
“Energy transfer in
classical trajectories of atom-diatomic molecule
collisions”, Hamzeh M. Abdel-Halim and Badria Al-Shihi,
Indian J. Chem., 35A, 366 (1996).
|
|
1994 |
Asian J. Chem |
"A New Model for the
Calculation of Thermodynamic Functions of Simple
Salts in Aqueous Solutions", H. M. Abdel-Halim,
Asian J. Chem., 6, 592 (1994).
|
|
1994 |
Asian J. Chem |
"Kinetics of Amino
Acids Oxidation by Alkaline Transition Metal
Complexes", Hamzeh M. Abdel-Halim and Yasmeen Al-Lawatia,
Asian J. Chem., 6, 655 (1994).
|
|
1991 |
J. Organomet. Chem.
|
"Synthesis and
nonlinear optical properties of some substituted
ruthenium (II)
h5 ‑
cyclopentadienyl
h5 ‑
or
h6 ‑
arene salts", Masaru Kimura, Hamzeh Abdel-Halim,
Dean W. Robinson and Dwaine O. Cowan, J.
Organomet. Chem., 403, 365 (1991). |
|
1989 |
J. Chem. Phys |
"Hyperpolarizabilities of 4-amino-4¢
-nitrodiphenyl sulfide and all of its chalcogen
analogues", D.W. Robinson, H. Abdel-Halim, S. Inoue,
M. Kimura and D.W. Cowan, J. Chem. Phys., 90, 3427
(1989)
|
|
Date of
Publication |
Name of
Publication |
Title of
Published Research |
|
1988 |
J. Org. Chem |
"Desirable Route to
Heterodimers of 1,4-Dihalobenzenes and Anthracene
and Their Photoproperties and Thermal Properties",
Masaru Kimura, Hamzeh Abdel-Halim and D.O. Cowan, J.
Org. Chem., 53, 3908 (1988).
|
|
1986 |
J. Phys. Chem |
"Preliminary Study
of the Nonlinear Optical Properties of 4-Amino-4¢-nitrodiphenyl
Sulfide", H. Abdel-Halim, D.O. Cowan, D.W. Robinson,
F.M. Wiygul and M. Kimura, J. Phys. Chem., 90, 5654
(1986) |
|
1986 |
Chem. Phys |
"Temperature
Dependence of Vibrational Energy Transfer in
Liquids: V-V Relaxation of CO(u
= 1) by O2 in Liquid Ar From 86 to 145
K", Donald W. Lupo, Hamzeh Abdel-Halim and George E.
Ewing, Chem. Phys., 104, 455 (1986). |
|
1985 |
J. Chem. Phys |
"Vibrational energy
transfer between CO and CH4 , CD4
, and CF4 in liquid Ar", Hamzeh
Abdel-Halim and George E. Ewing, J. Chem. Phys., 82,
5442 (1985) |
*Faculty:
Science and Arts /
Chemistry.
* Specific
Specialization: Physical
Chemistry
.
- Synthesis and catalytic
activity of new bisaminediphosphane ruthenium (II) complexes
Monther Khanfer *
Total Funding:
2700
Funded by:Hashemite
University
Acceptance Date:
24/6/2003
Duration of Project :
12 months
ABSTRACT
Herein, it has been envisaged to
synthesize some new ruthenium (II) complexes bearing simple cheap
diamine ligand systems leading to new structural features at the
active metal center, which is expected to give similar or more
potential catalytic activity with cheaper catalyst than what is
reported in the literature. The catalytic activity measurements will
be made on the trans-4-phenyl-3-butene-2-one (Scheme 2) as an
example ofa,b-unsaturated
ketone.
Funded Projects by HU:
|
Date of Publication |
Name of Publication |
Title of Published
Research |
|
- |
- |
- |
Other Projects:
|
Date of Publication |
Name of Publication |
Title of Published
Research |
|
- |
- |
- |
*Faculty:
Science and Arts /
Chemistry.
*Specific Specialization:
Organo Metallic
Chemistry
.
Synthesis and Properties of some
thieno[2',3':6,7]azepino[5,4,3-cd]indoles
Kayed Abu Safeyyeh *
Total Funding:
3200
Funded by:Hashemite
University
Acceptance Date:
29/4/2001
Duration of Project :
12 months
ABSTRACT
The interaction of indolylzinc chloride with
2-chloro-3-nitrothiophene gave 3-(3-nitrothien-2-yl)indole, which
was reduced and acylated. The acylated product was cyclized using
POCl3 under Bischler-Napieralski conditions to afford the
respective thieno[2',3':6,7]-azepino[5,4,3-cd]indoles.
Funded Projects by HU:
|
Date of Publication |
Name of Publication |
Title of Published
Research |
|
2002 |
Heterocycles, 57(10),
1831 |
Synthesis of Some
Thiophene-Fused Azepino[5,4,3-cd]indoles |
Other Projects:
|
Date of Publication |
Name of Publication |
Title of Published
Research |
|
2001 |
J. Heterocyclic Chem.,
38, 623 |
Synthesis of Pyrazole-fused
Azepino[5,4,3-cd]indoles |
|
2002 |
Z. Naturforsch, 57b,
1327 |
Bischler-Naprielski
Synthesis of Some New Pyrazole-Fused
b-Carbolines, |
|
2003 |
Heterocycles, 60 (6),
1339 |
Synthesis and Dopamine
Receptor Binding of Some
Pyrazolo[3',4':6,7]Azepino[5,4,3-cd]Indoles |
*Faculty: Science and
Arts/ Chemistry.
* Specific Specialization:
Organic
Chemistry
.
Chiral-4,5-Dihydro -1,2,4-Triazin - 6-Ones:- a Source of Oxime-Type
Chelate Ligands for Complexation With Metals
Ahmad Abushamleh *
Total Funding:
3000
Funded by:Hashemite
University
Acceptance Date:
25/11/2002
Duration of Project :
24 months
ABSTRACT
The project aims at
synthesizing a series of new oxime ligands based on chiral
triazinone compounds. These should have interesting chiroptical
properties and their complexes should also have important structural
properties (carbon-carbon couplings have been observed in the first
phase of the project). It is also anticipitated that the complexes
may have some biological activities such as antibacterial or
antifungul activities. The platinum complexes may also have some
antitumor activity.
Funded Projects by HU:
|
Date of Publication |
Name of Publication |
Title of Published
Research |
|
2000 |
M. M. El-Abadelah, and
C. M. Mossmer, Heterocycles |
Transition Metal
Complexes of Derivatized Chiral
Dihydro-1,2,4-triazin-6-ones: Part I. Nickel (II)
Complex of (D)-3-acetyl-5-benzyl-4,5-dihydro-1,2,4-
triazin-6-one Oxime. |
|
2000 |
Heterocycles |
Synthesis and Structural
Characterization of Palladium Complex with ( L )
–3-acetyl-5-benzyl-1-phenyl-4,5-dihydro-1,2,4-triazin-6-one
Oxime. Part II. |
|
2000 |
Z. Naturforsch |
Transition Metal
Complexes of Derivatized Chiral
Dihydro-1,2,4-triazin-6-ones: Part III. X-Ray Structure
of N,
N'-Bis[1-phenyl-5-isopropyl-4,5-Dihydro-1,2,4-traizin-3-yl-(1-ethylene)]-1",
3"-diaminopopanenickel(II). |
Other Projects:
Date of
Publication
|
Name of
Publication |
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