Tetradentate Schiff Base Metal Complexes With substituted-arylethynyl Groups: Synthesis, Characterization, and Photophysical Properties
Date Issued
2005
Date
2005
Author(s)
HSU, CHIH-HAO
DOI
en-US
Abstract
我們以5-bromosalicylaldehyde為起始物與炔類經由Sonogashira耦合反應 可合成一系列含有取代的芳香炔基之配基。這些配基和金屬鹽類作用，再加入不同的雙胺化合物，就能得到四牙基席夫鹼金屬錯合物。所有化合物皆經由1H-NMR、13C-NMR及Mass加以鑑定其結構與純度。在熱性質方面，以熱重分析儀(TGA)得知熱裂解溫度(Td)為427 ℃ ~ 573 ℃，而化合物的光學性質則由紫外光可見光光譜儀(UV/vis)和螢光分光光譜儀測得，化合物在極稀的四氫呋喃溶劑中所得到的最大吸收波長範圍為425~465 nm;最大螢光放射波長為523~571 nm，並具有不錯的量子效率。
A new series of substituted-arylethynyl ligands have been synthesized from 5-bromosalicylaldehyde via Sonogashira coupling reaction. Tetradentate Schiff base metal complexes were obtained by a new 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 spectroscopies and Mass. The thermal properties of these complexes were measured by TGA. The onset decomposition temperatures (Td) of all compounds range from 427 ℃ to 573 ℃. The optical properties of these complexes were measured by UV/vis and PL (photoluminescent) spectroscopic studies. All of these compounds exhibit the maxaimum absorption in the range of 425-465 nm in diluted tetra hydrofuran. They emit yellow to orange fluorescence around 523-571nm in tetra hydrofuran with moderate to good quantum efficiencies.
Subjects
席夫鹼金屬
Schiff Base
Type
thesis
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