Alkynylated Schiff Base Metal Complexes Containing Multiple-Alkyl Chains in Zn and Mg System: Synthesis, Characterization, and Photophysical Properties
Date Issued
2005
Date
2005
Author(s)
Lin, Hung-Chih
DOI
en-US
Abstract
A new series of substituted-arylethynyl ligands have been synthesized via Sonogashira coupling reaction. A series of Schiff base metal complexes were obtained by a method that the ligands are first treated with metal salt followed by addition of the different diamines. These compounds were characterized by 1H and 13C NMR and mass spectroscopies. The optical properties and the thermal properties of these complexes were measured by UV/vis, PL (photoluminescent) and TGA spectroscopic studies. All of these complexes emit orange fluorescence in THF with good quantum efficiencies. All of these complexes exhibited highly thermal stability in nitrogen (Td ＞ 400℃).
The Mg(II) Schiff base derivatives were synthesized by the same methodology used for the preparation of Zn(II) analogues. These Mg-complexes emit yellow fluorescence in THF and the quantum yield was dramatically enhanced relative to Zn-complexes. Additionally, the unsymmetrical Zn(II) Schiff base complexes also can be prepared. The optical properties of unsymmetrical complexes are some different from that of symmetrical complexes.
Subjects
席夫
合成
鑑定
Schiff
Synthesis
Characterization
Type
thesis
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