Author/Authors :
Tadjarodi، A. نويسنده Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran , , Azad، A. نويسنده , , Dekamin، M. G. نويسنده Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran , , Afshar، S. نويسنده Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran , , Hejazi، R. نويسنده Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran , , Mollahosseini، A. نويسنده School of Chemistry, Iran University of Science and Technology, Tehran, Iran ,
Abstract :
در اين مقاله نانوذرات تيتاناي سولفاته با روش سل-ژل و تتراتيتانيوم ايزوپروپوكسيد به عنوان ماده اوليه سنتز شد. نانوذرات سنتز شده توسط پراش اشعه X، ميكروسكوپ الكتروني روبشي ، آناليز سطح ، اسپكتروسكوپي مادون قرمز و آناليز كيفي EDS شناسايي شد. نانوذرات سنتز شده به عنوان تركيب موثر ، قابل بازيابي و دوستدار محيط زيست براي سنتز مشتقات پلي هيدروكينولين توسط روش تك مرحله اي چندگانه با آلدهيدها، آمونيوم استات و 1،3 دي كربونيل تحت رفلاكس استفاده شد.
Abstract :
Sulfated titania nanoparticles (SO4
2-
/TiO2 NPs) were synthesized
using titanium tetraisopropoxide (TTIP) by the sol-gel method.
The structure and morphology of the prepared nanocatalyst was
characterized using X-ray diffraction (XRD), scanning electron
microscopy (SEM) and Brunauer–Emmett–Teller (BET)
methods as well as Fourier transform infrared (FT-IR) and
energy dispersive X-ray (EDX) spectroscopy. The obtained
nanoparticles were used as an efficient, reusable and
environmentally friendly catalyst for the synthesis of
polyhydroquinoline (PHQ) derivatives via a one-pot
multicomponent reaction of various aldehydes, ammonium
acetate and 1,3-dicarbonyl compounds under reflux conditions.
The desired Hantzsch esters were obtained in good to excellent
yields and short reaction times. The SO4
2-
/TiO2 NPs could be
recycled at least three times without significant loss of their
catalytic activity.
