دراسة القياس الطيفي لمجمعات الحديد (III) باستخدام مركب قاعدة شيف المركب حديثا المشتق من 4،4'-ديامينوديفينيل ميثان
DOI:
https://doi.org/10.63359/23kdsh17الكلمات المفتاحية:
قاعدة شيف، 4،4 '-ديامينوديفينيل ميثان، Fe3 +، روابط كروموجينيكالملخص
تهدف هذه الدراسة إلى تحضير اثنان من قواعد شيف اللونية عن طريق التفاعل التكثيفي بين الأمين الأولي 4و4-ثنائي أمين ثنائي فينيل ميثان و 2-هيدروكسي-3-ميتوكسي بنزالدهيد و 4-هيدروكسي-3-ميتوكسي بنزالدهيد بنسبة تفاعل 1:1 في وسط حمضي . لقد تم تشخيص المركبات الناتجة باستخدام بعض الطرق الطيفية المتبعة (التحليل الدقيق للعناصر ومطيافية الاشعة تحت الحمراء ومطيافية الرنين المغناطيسي) . وتمت ايضا دراسة قدرة هذه المركبات في تكوين معقدات مع بعض العناصر الانتقالية (مثل: Fe3+, Co2+, Ni2+, Cu2+, Ag+, Pb2+ Sn2+) باستخدام مطيافية الضوء فوق البنفسجي-المرئي (UV-Vis). وبينت الدراسة انتقائية هذه المركبات في تشكيل معقدات ملونة مع الحديد الثلاثي (Fe3+) في الوسط العضوي ثنائي ميثيل السلفوكسيد (DMSO) . حيث امكن من الدراسة ملاحظة تكون المعقدات الناتجة مباشرة بالعين المجردة عن طريق تغير لون المحلول (من البرتقالي الى الاخضر) بمجرد اضافة أيون الحديد الثلاثي الى محلول المركب .وتم تحديد المعقد عند الطول الموجي (=630nm). واظهرت النتائج ان هذه القواعد تتفاعل تفاعلا مباشرا مع الحديد الثلاثي وتنتج معقدات ثنائية النواة وبنسبة 1:1 مولار [Fe3+:L] بالنسبة للمركب الاول , وبنسبة 1:3 للمركب الثاني . وقد اثبتت الدراسات التحليلية التي اجريت ان لكلا المعقدين الناتجين من تفاعل المركبين مع الحديد الثلاثي ثباتيه عالية تصل الى (5.7105) و (1.3105) على التوالي.
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