Document Details

Document Type : Thesis 
Document Title :
NANOCOMPOSITES BASED ON POLYVINYL PYRROLIDONE DERIVATIVES FOR VARIOUS APPLICATIONS
التوليفات النانوية المعتمدة على مشتقات البولي فينيل بيروليدون من أجل التطبيقات المتنوعة
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : This thesis contains two parts, the 1st part contains four sections, section A aimed to synthesize different types of chemically modified PVP, while sections B, C and D deals with its related nanocomposite materials via reinforcement of the previously prepared samples with G, CNTs and ZnO respectively with the help of ultrasonic assistance. The 2nd part contains the use of those materials as catalysts in the synthesis of new important organic polycyclic compounds according to multicomponent reaction (MCRs). [PVP.SO3H]Cl, [PVP.SO3H]HSO4, [PVP.SO3H]H2PO4 and [PVP.SO3H]TfO were prepared in the 1st section. These products were characterized and identified via FTIR which showed the major functional groups such as sulfinyl group, XRD which explains the changes in the structural properties of the amorphous nature of PVP to the semi-crystal nature of each catalyst. Moreover, the TGA analyses explain the variation in the thermal stability of all catalysts. In addition, the SEM and TEM micrographs showed the internal details by the microscopic view and how to convert the smooth shape of PVP to the uneven shape of the chemically modified PVP. The 2nd section included the modification of these products with G (2% loading). The results confirmed the success of the incorporation of G by exhibiting an obvious peak in XRD and RAMAN spectra in addition to the other common characterization tools. 3rd section included the modification of these products with CNTs (2% loading). The results confirmed the success of incorporation of CNTs which exhibit an obvious peak in XRD and RAMAN spectra in addition to the other common characterization tools. 4th section included modification of these products in 1st section with ZnO (5% loading). The SEM and EDX results confirmed the success of the incorporation of ZnO addition to the other common characterization tools. On the other hand, these fabricated catalysts were successfully used as green catalysts to synthesized new heterocyclic compounds by following the traditional and Sonicated methods. All the optimization procedure were also investigated including: The effect of catalyst, temperature and ultrasonic irradiation. The new compounds were confirmed by spectral characterization NMR technique. The results confirm the efficiency and the recyclability of the catalysts by performing the reactions in the absence of the catalysts. 
Supervisor : Dr. Wafa AbuBaker 
Thesis Type : Master Thesis 
Publishing Year : 1444 AH
2023 AD 
Co-Supervisor : Prof. Dr. Mahmoud Ali 
Added Date : Wednesday, August 9, 2023 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ليلى رشيد الفهميAlfahmy, Layla RasheedResearcherMaster 

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