Document Details

Document Type : Thesis 
Document Title :
Designing Schiff Base Ligands for Photophysically-Active Diimine Platinum(II) Complexes
تصميم متصلات شيف بيس لتحضير معقدات البلاتين الثنائي مع الدايمين ذات النشاط الضوء فيزيائي
 
Subject : Faculty of Sciences 
Document Language : Arabic 
Abstract : The square planar bidentate platinum(II) complexes have attracted much attention because of their particularly appealing photophysical and photochemical properties. The bidentate diimine platinum(II) complexes are known class of complexes that possess interesting photophysical and biological activites. Bipyridines and their derivatives was replaced with the Schiff bases in order to examine the effect of the spectroscopic and biological properties in platinum(II) diimine complexes. Schiff bases are cheapear alternatives to bipyridines and can be easily prepared and functionalized with many functional groups. A series of two types of Schiff base ligands were synthesized at different conditions. The first series was synthesized by reacting pyridine-2-carboxaldehyde and variant amines. Expected and unexpected products were obtained and the products were identified by X-ray single crystal structures. Reaction of these ligands with Pt(II) complexes afforded the square planar d8 complexes. Complexes were characterized by 1HNMR and FT-IR spectroscopices. The chemical structures of complexes (2.2) and (2.5) where identified by single-crystal X-ray diffraction analysis. Spectral studies showed that the absorption spectra affected by the nature of the substituents on the Schiff base ligands. Intense and broad emission was observed in all the metal complexes upon exciting their dimethyl sulfoxide solutions at 310 nm. Some of the ligands and all the platinum(II) complexes were tested against some human pathogenic bacteria and fungi and the complexes PtCl2(C5H4N-2-CH=N-C6H4-4-NO2) and PtCl2(C5H4N-2-CH=N-C6H4-COCH3) showed interesting inhibiting effects. Another series of Schiff bases were synthesized from the reaction of 1,2-diaminoethane and variant aldehydes. These ligands were reacted with cis-PtCl2(DMSO)2, forming a yellow solution in dichloromethane under N2 that started to produce a yellow precipitate upon air exposure. The yellow powder is believed to be resulting from Pt-Pt interactions. 
Supervisor : Prof. Mutlaq Aljahdali 
Thesis Type : Master Thesis 
Publishing Year : 1438 AH
2017 AD 
Co-Supervisor : Dr. Bandar A. Babgi 
Added Date : Thursday, August 17, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ندى ظافر الخثعميAlkhathami, Nada DhaferResearcherMaster 

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