Photo-Induced Isomrization of Salen Type Schiff Base Compound and Alkynylated Schiff Base Zn and Mg Complexes: Synthesis, Characterization, and Photophysical Properties
Date Issued
2007
Date
2007
Author(s)
Liao, Yong-Hong
DOI
en-US
Abstract
Various substituted salicylaldehydes have been synthesized via Sonogashira, Ullmann, or other coupling reaction. Some Schiff base metal complexes are obtained by treating the mixture of ligands, metal salt with different diamines. These compounds are characterized by 1H and 13C NMR and mass spectroscopies. The optical properties of these complexes were measured by UV/Vis, and PL (photoluminescent). Some of these complexes (20X) emit orange fluorescence in THF with high quantum efficiencies.
Lastly, treatment of diaminomaleonitrile with 2-hydroxy-4-(di-p-tolylamino)benzaldehyde with one drop concentrated sulfuric acid in ethanol afforded compound 301. There are several attractive phenomena in the compound 301. Single crystal data are obtained for the two geometric isomers of 301. The experiments to obtain optical property of 301 were also carried out. It is proposed that conversion of isomers is induced by photo isomerization. Because the luminescence of 301 is strong enough its photophysical properties was carefully investigated. Thus, those experiments on 301 provide details on the mechanism of photo-induced-isomerization.
Subjects
席夫鹼
Schiff Base
Photo Induced isomerization
Type
thesis
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