نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی، دانشکده علوم، دانشگاه بیرجند

2 گروه شیمی، دانشکده علوم، دانشگاه بیرجند، بیرجند، ایران

چکیده

در این تحقیق کاتالیزور مغناطیسی جدیدی با تثبیت کردن زعفران بر روی سطح نانوذرات γ-Fe2O3 تحت امواج فراصوت سنتز شد (γ-Fe2O3@Saffron). کارآیی کاتالیزوری به عنوان یک کاتالیزور قابل بازیابی در سنتز انواع مشتقات کوئین اکسالین ها تحت شرایط ملایم و سازگار با محیط زیست بررسی گردید. در این روش، بازده مطلوبی برای ترکیبات هتروسیکل با بکاربردن اتانول به عنوان حلال دوستدار محیط تحت شرایط ملایم بدست آمد. این کاتالیزور جدید مغناطیسی، بوسیله آهن‌ربا به آسانی از محیط واکنش قابل جداسازی بوده و حداقل پنج بار بدون کاهش در فعالیت کاتالیزوری قابل بازیابی می‌باشد. از مزایای دیگر این سیستم کاتالیزور سهولت بازیابی کاتالیزور در انتهای واکنش، شرایط مناسب و میزان تبدیل بالای محصولات می باشد. این عوامل به همراه قابلیت بالای استفاده مجدد از کاتالیزور، پژوهش حاضر را برای مسائل محیطی و صنعتی بخوبی ارائه می کند. شناسایی کاتالیزور با استفاده از تکنیک‌های FT-IR, XRD, VSM و TEM انجام شده است.

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