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تحضير ودراسة طيفية وامتزاز لمعقدات بعض ايونات العناصر الانتقالية لليكندات المشتقة == Synthesis Spectroscopic And Adsorption Studies of Some Ions Transition Metal Complexes For Ligands Derived From Sulfamethoxazole And Its Mixed Ligands
Author name:
فرح علي داود
Supervisor name:
ساهرة صادق عبد الرزاق | احمد ثابت نعمان
General topic:
Chemistry
Specific topic:
Chemistry
Degree:
Master
University:
University of Baghdad
Language:
Arabic
University location:
Baghdad
First pages:
25T1505 - p.pdf
Abstract:
ان الهدف من الدراسة هو تحضير وتشخيص ليكاند ثنائي السن : - [4 - (5,5 - dimethyl - 3 - oxocyclohex - 1 - enylamino) - N - (5 - methylisoxazol - 3 - yl)benzene sulfonamide]من تفاعل السلفاميثوكسازول مع الدايميدون لينتج الليكاند [H2L] باستخدام طريقة الصهر ا | The aim of the study is the preparation and characterization of bidentate Ligand [4 - (5,5 - dimethyl - 3 - oxocyclohex - 1 - enylamino) - N - (5 - methylisoxazol - 3 - yl) benzene sulfonamide]. The ligand was prepared by fusing sulfamethoxazole and dimedone at (170) ?C for half hour. The prepared ligand was characterized by FTIR,UV - Vis spectroscopy, H1,C3 - NMR spectra, mass spectra, molar conductivity measurement and melting point. The molecular structure for the ligand [H2L] which was proposed as drawn in the figure below : - Ligand [H2L]The complexes prepared using reflux in ethanol as solvent were two types namely : - 1 - Complexes of (1 : 1) mole ratio formula [M(H2L)(H2O)2]Cl22 - Complexes of (1 : 1 : 1) mole ratio formula [M(H2L)(HA)] in the presence of KOH as a base, Where : - M(II) = (Co ,Ni ,Cu) HA= 3 - amino phenol. Spectroscopic methods (FT - IR, UV - Vis spectroscopy) along with (A.A), chloride content and melting point were carried out in addition to molar conductance were done for the characterization of all complexes.The proposed tetrahedral geometry around the metal ions studied were concluded from these measurements. [M(H2L)(H2O)2]Cl2 [M(H2L)(HA)]Molar ratio method were used to determine M to L ratio at maximum wave length (?max=455nm ).The ratio were (1 : 1) mole for both complexes (1) and (4). Bentonite clay was used as adsorbent surface to gather with complexes (1) and (4). The adsorption time investigated was between (15 - 120) min at (25)°C as constant concentration for complexes being (70) mg/L for complex (1) and (50) mg/L for Complex (4) and mesh 75))?m. The results revered that the time needed to reach concentration equilibrium in the were 60 to 75 min for complex (1) and (4). during studying isotherm adsorption for the two complexes on bentonite surface, the results revealed that the trend of the adsorption isotherm was (L1) type according to Giles classification , which means that the adsorbent distributed horizontally on the bentonite surface to from a single adsorption layer type langmire.The adsorption phenomenon was studied at different temperatures (10, 25, 37.5, and 50) oC. The results of the adsorption for both complexes on bentonite surface were showed an increase with increasing temperature (endothermic process). Thermodynamic functions (?Ho, ?Go, and ?So) were calculated and the results were discussed. Generally, the increase in the pH of solution was showed an increase in quantity of both complexes that adsorbed on bentonite clay surface at a certain temperature. The study proved that an increase of adsorbent weight may be enhanced the adsorption process of both complexes. Moreover, the particle size of clay surfaces has an influence on the adsorption process showing an increase in adsorption quantity as the particle size decreased.
