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Register a new userPreparation and characterization of some metal complexes ionophors for using in the selective ions memberance
تحضير و دراسة خصائص بعض مشتقات الفورمازان و استخدام معقداتها في الأغشية المنتقية للأيونات
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تهدف هذه الدراسة إلى تصنيع خمسة مشتقات للفورمازان (FM1–FM5) عن طريق تفاعل البنزالدهيدفينيل هيدرازون مع خمسة أملاح للديازونيوم بنسبة تفاعل 1:1 في وسط قلوي. حيث حضر الهيدرازون عن طريق التفاعل بين الفنيل هيدرازين و البنزألدهيد بنسبة تفاعل 1:1 في وسط حمضي ضعيف. شكلت بلورات للمركبات الناتجة عن طريق إعادة البلورة باستخدام العديد من المحلات، و تبين تفاوت انحلالية بين هذه المركبات تبعاً لنوع المحل، و نوع ملح الديازونيوم المستخدم, كما درست نقاوته باستخدام كروماتوغرافيا الطبقات الرقيقة. قيست درجات انصهار كل من الهيدرازون المحضر و مركبات الفورمازان الناتجة , و بينت الدراسة نجاح تشكيل معقدات مع كل من الرصاص و النحاس الثنائي و الكادميوم و تم إثبات هوية المعقدات المتشكلة باستخدام مطيافية فوق البنفسجي UV، و مطيافية تحت الحمراء IR و ستستخدم هذه المعقّدات كمادة فعالة كهركيميائياً في الغشاء المنتقي للأيونات فيما بعد.
Five derivatives of Formazn (FM1–FM5) were prepared through reaction between benzaldehydphenylhydrazone with five diazonium salts by a reaction ratio of 1:1 in alkaline medium. The hydrazone was prepared through the reaction between phenylhydrazine and benzaldehydeby a reaction ratio of 1:1 in a slight acidic medium. Crystals of formazans resulting from recrystalization were formed by using different solvents and show variation of solubility among these formazans according to the kind of the solvent and the kind of diazonium salt used. Their purity was studied by using thin layer chromatography. The melting point of the prepared hydrazone and the resulting Formazan complexes were complexes with lead (II), copper(II) and cadmium were successfully prepared and studied by using UV and IR spectroscopy. These complexes were used as ionophors and applied as electrically active materials in the preparation of ion-selective membranes for the mentioned metal ions.
References used
TEZCAN,H.Thesynthesis of some bis-substituted formazans and the investigation of theeffect of substituent upon UV-VIS ƛmax values.Commum.Fac.Univ.Ank.Series B, Vol.51,No.1,2005,13-28
BADAWY,S.S.;ISSA,Y.M.;ABDELFATTAH,H.M.Thermogravimetric studies on lanthanide complexes of new derivatives of 1,5-di aryl-3-acetylformazan.Thrmo chim.Acta, 144,1989,249-255
KATRITZKY,A.R.;BELYAKOV,S.A.;CHENG,D.;DURST,H. D.Syntheses of formazansunderphase-transfer conditions. Synthesis.5,1995,577-581
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Quinaldine includes shifting hydrogenes which might be involved in
important reactions as the condensation and Mannich reactions.
Quinophtalone has been prepared through the reaction of quinaldine with
phtalyic anhydride in the presence of alumini
um chloride anhydrous
Imines derivatives have been prepared through the reaction of
Quinophtalone with hydroxideamine and phenyl hydrazine and then
diazotion anyhydride has been done to the resulting compounds.
The prepared compounds were characterized by ( H1NMR,IR, MS)
Some samples of alumina supporting with sulfate ions and molybdenium were
prepared by impregnation method. Supported samples were calcinated at 550°C for 6h.
Presence of sulfate ions and molybdenium lead to decreasing of the specific surface area o
f
alumina, and in the ease of molybdenium the decreasing value was higher. The total pore
volume was decreased with the pore size was increased. XRD patterns showed that the
incorporation of sulfate ions and molybdenium did not affect crystalin structure of
alumina. FTIR spectra showed the bonding between sulfate ionsmolybdenium
and
alumina. The TG-DTA studies showed that the losses mass was decreased when the sulfate
ions and molybdenium were incorporated, sulfate ions and molybdenium oxide
decomposed at ~700°C and ~800°C respectively .
Some chemical, spectral and thermal characteristics of some humic acids
(HA) extracted from: Farm manure (Fm), biogas(Bio), compost (Com), forest
litters of pine (Pl) and of descendant forest (Dl), and their complexes with Camontmorillonite
were s
tudied by TGA and DTA analysis.
The Xerogel alumina catalyst was prepared by sol-gel
method in non-aqueous milieu, and the aerogel alumina
catalyst was prepared in the same method but it was dried at
by supercritical conditions. These catalysts were characterized
by XRD, BET, a
nd chemical adsorption methods. The
obtained results were compared to show the effect of
preparation process on the structural properties of the alumina.
Besides these results were compared with some oxides
supported on alumina, and the effect of distribution of these
oxides on the properties of alumina was investigated too.
يعد الميتانول و الإيتانول من أكثر المحلات شيوعاً، و بما أن درجة غليانها أقل من مئة
درجة مئوية فإنها تتطاير بشكل سريع. و على سبيل المثال، يستعمل الميتانول في تصنيع
الأصبغة و العقاقير و العطور.. و هو شديد السمية، لذلك من الضروري تطوير محسات لكشفه.
أ
ما غاز الأمونيا فهو من ملوثات الهواء و له مصادر كثيرة مثل صناعة الأسمدة و أنظمة
التبريد.. و من هنا أهمية كشفه.
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