تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Potentiometric and spectroscopic studies of sulfonamide azo-dye complexes with some transition metal ions and uranium
Potentiometric and spectroscopic studies of sulfonamide azo-dye complexes with some transition metal ions and uranium
 
الموضوع : كيمياء 
لغة الوثيقة : الانجليزية 
المستخلص : Molecular structure of the azo-dye derived from sulfonamide was synthesized. The elucidation of ligand and complex structures were studied by electronic, infrared and 1H NMR spectroscopies. Proton-ligand constants of sulphonamid azo-derivatives and the stability constant of Mo (III), VO (II), UO2 (II) and Co (II) metal ions with sulfonamide azodye derivatives have been determined potentiometrically in 0.1 M KCl and 30% (v/v) ethanol-water mixture. The data are discussed in terms of the electronic character of the substituents and of the change in temperature. The pK1-H values have been found to increase with increasing electron donating nature of the subsituents. The evaluated dissociation processes are non spontaneous, endothermic and entropically unfavourable. The order of the stability constants of the formed complexes was found to be Mo3+>VO2+>UO22+>Co2+. The influence of substituents on the stability of the complexes was examined on the basis of an electron repelling property of the substituent. The effect of temperature on the stability of the formed complexes was studied and the corresponding thermodynamic parameters (ΔG, ΔH and ΔS) were evaluated and discussed. The stoichiometries of these complexes were determined conductometrically and indicated the formation of 1:1 and 1:2 (metal:ligand) complexes. 
ردمد : 0872-1904 
اسم الدورية : Portugaliae Electrochimica Acta 
المجلد : 27 
العدد : 2 
سنة النشر : 2009 هـ
2009 م 
عدد الصفحات : 10 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Monday, October 12, 2009 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
السيدالبدوي حسيني سليم المسلميEl-sayed El-Badawy El-Mossalamyباحثدكتوراهsbdmina@yahoo.com

الملفات

اسم الملفالنوعالوصف
 23396.pdf pdfAbstract

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