شیف باز آهن (III) تثبیت شده بر سیلیکای متخلخل و مغناطیس: یک مطالعه ی مقایسه ای برای اکسایش الکل ها و سولفیدهای بنزیلی

نوع مقاله : مقاله علمی پژوهشی

نویسندگان

بیرجند، دانشگاه بیرجند، گروه شیمی، ایران

چکیده

کمپلکس باز شیف آهن (III) در بسترهای مغناطیسی سیلیکا و نیز مزو حفره ی سیلیکا، تثبیت شد و با تکنیک های XRD، TEM، FT-IR، AAS، VSM و در مورد مزوحفره ی سیلیکا با تکنیک جذب و واجذب نیتروژن و TGA نیز مورد شناسایی قرار گرفت و جهت اکسایش الکل های بنزیلی و سولفیدها با آب اکسیژنه به عنوان یک اکسید کننده ی سبز مورد استفاده قرار گرفت. مطالعه ی تاثیر ساختار بستر در واکنش های ذکر شده نشان داد که استفاده از مزوحفره در اکسایش سولفیدها و الکل های بنزیلی با آب اکسیژنه در شرایط بهینه، بهره ی کاتالیزوری بالاتری در مدت زمان مشابه و یا حتی کمتر ارائه می دهد. بهره ی کاتالیزوری بیشتر بستر مزوحفره را بر اساس شناسایی های انجام شده (تکنیک جذب-واجذب نیتروژن) می توان به مساحت سطح بالای این بستر و نیز اتصال قوی تر کمپلکس باز شیف آهن (III) به مزوحفره (تست حلال شویی) نسبت داد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Iron (III)-schiff base immobilized on porous silica and magnetite: a comparison study for oxidation of benzylic alcohols and sulfides

نویسندگان [English]

  • Mona Rajaee
  • reihaneh Malakooti
  • Somayye Hadizade
  • Aliyeh Feghhi
Department of Chemistry, Faculty of Basic Sciences, University of Birjand, Birjand, Iran
چکیده [English]

The iron (III) Schiff base complex was immobilized on magnetic silica as well as mesoporous silica substrates and characterized by XRD, TEM, FT-IR, AAS, VSM techniques, and in the case of mesoporous silica, it was also identified with N2 adsorption/desorption and TGA methods. These materials were applied for oxidation of benzyl alcohols and sulfides with hydrogen peroxide as a green oxidant. The effect of catalyst structures was studied in the mentioned reactions. The results showed that using of mesoporous silica in the oxidation of sulfides and benzyl alcohols with hydrogen peroxide in the optimal reaction conditions provided a higher catalytic yield in the same or even less reaction time, The higher catalytic performance of the mesoporous substrate based on the identifications (carried out by N2 adsorption/desorption technique) can be attributed to the higher surface area of this substrate and the stronger connection of the Schiff base complex of iron (III) to the mesoporous silica (according to leaching test).

کلیدواژه‌ها [English]

  • Sulfide oxidation
  • Alcohol oxidation
  • Iron (III) Schiff base
  • SBA-15
  • Fe3O4

This is an open access article under the CC-BY-SA 4.0 license.( https://creativecommons.org/licenses/by-sa/4.0/)

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شیمى کاربردى روز
دوره 19، شماره 70
فروردین 1403
صفحه 59-74

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