25 مهر 1403
زهرا صولتي دالكي

زهرا صولتی دالکی

مرتبه علمی: استادیار
نشانی: دانشکده علوم و فناوری نانو و زیستی - گروه شیمی
تحصیلات: دکترای تخصصی / شیمی
تلفن: -
دانشکده: دانشکده علوم و فناوری نانو و زیستی

مشخصات پژوهش

عنوان UV-Vis study of the reaction of chloro(tetraphenylporphyrinato)manganese(III) with tetra-n-butylammonium hydrogen monopersulfate in the presence of imidazole
نوع پژوهش مقالات در نشریات
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مجله JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
شناسه DOI
پژوهشگران سید مجید هاشمی (نفر اول) ، زهرا صولتی دالکی (نفر دوم) ، پگاه محمدپور (نفر سوم)

چکیده

Reaction of chloro(tetraphenylporphyrinato)manganese(III) with tetra-n-butylammonium hydrogen monopersulfate (n-Bu4NHSO5) in the presence of high ratio of imidazole was followed by UV-Vis spectroscopy in CH2Cl2 at room temperature. The variation in the UV-vis spectra shows that the reaction goes through Mn(III), high valent Mn(V) or Mn(IV), Mn(III), low valent Mn(II) and again Mn(III) complexes. The Mn(III) complex before the addition of n-Bu4NHSO5 could not be reduced to Mn(II), but Mn(III) complex which was obtained after decay of high valent Mn complexes was reduced to Mn(II), probably because its spin state is different from the first one. Addition of methanol to the reaction mixture (in the presence or absence of ferrocene) shows that two high valent Mn complexes [(MnV(TPP)- (O)(X)] (X = Im- or OMe-) and [MnIV(TPP)(OMe)2] are involved in the course of the reaction. Using meta-choloroperbenzoic acid instead of (n-Bu4NHSO5) as oxidant showed that reduction of Mn(III) to Mn(II) is taking place only in the presence of HSO4 -.