Tetradentate Schiff Base Metal Complexes With substituted-arylethynyl Groups: Synthesis, Characterization, and Photophysical Properties

• Main Authors: CHIH-HAO HSU, 許志豪
• Other Authors: 林英智
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/10443694386572593870

碩士 === 國立臺灣大學 === 化學研究所 === 93 === 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.