New Preparation and Characterization of Reagent ۱-EDBBA Derived from Para-Amino Benzoic Acid: Impact of Solvent and Limitation Isosbestic Point Study

سال انتشار: 1404
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 48

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شناسه ملی سند علمی:

JR_AJCS-8-3_006

تاریخ نمایه سازی: 26 مهر 1403

چکیده مقاله:

The production of the new azo compound via a diazotization reaction between ۴-aminobenzoic acid and ethyl acetoacetate is the aspect of the investigation by more than one technique FT-IR, ۱H-NMR and UV-Vis spectrophotometry. The electronic absorption spectra of ۱-EDBBA have been recorded and analyzed using various polar solvents. The interaction of this approach provides a way to evaluate the relative importance of various kinds of spectra to overall interaction changes in the solution. UV-Vis spectrophotometry was employed to measure the pKa and isosbestic point of reagent ۱-EDBBA. The ratio of absolute ethanol to distilled water in the alcoholic solution of ۱-EDBBA was ۰.۱:۴.۹. The maximal absorption is unchanged by this ratio. It indicates the pH impact of ۱-EDBBA between ۱ and ۹.۵, and ۴۰۵ nm displays the ۱-EDBBA's isosbestic point. The absorbance-pH graph at specific wavelengths shows an S-shaped pattern with inflections corresponding to pKa۱ and pKa۲. This is dependent on the acidity of the medium.

نویسندگان

Zainab Haider Falih

Department of Chemistry, Faculty of Education for Girls, University of Kufa, Najaf Governorate, Iraq

Zainab Abedumuttaleb Hammood

Department of Chemistry, Faculty of Education for Girls, University of Kufa, Najaf Governorate, Iraq

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