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Citation: You Chang-Jiang, Li Hong, Xie Rong, Yang Guo-Qiang, Li Yi. Photophysical Properties of Metal Complexes with Bis-(8-hydroxyquinoline) Open Chain Crown Ether[J]. Acta Physico-Chimica Sinica, ;2003, 19(10): 962-966. doi: 10.3866/PKU.WHXB20031016 shu

Photophysical Properties of Metal Complexes with Bis-(8-hydroxyquinoline) Open Chain Crown Ether

1.
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing　100101;Laboratory of Photochemistry, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing　100080

Received Date: 4 March 2003
Available Online: 15 October 2003

A bis-8-hydroxyquinoline “open chain crown ether" derivative (QP3Q) and its aluminum or zinc complex are synthesized. The steady state spectroscopy properties and fluorescence decay processes for the complexes (QP3Q-Zn2＋ and QP3Q-Al3＋) are studied. The composition and stability of the complexes are determined by their UV-Vis absorption. Both aluminum and zinc ions coordinated with QP3Q are in the proportion of 1∶1 and the stability constant of QP3Q-Zn2＋ and QP3Q-Al3＋ are 620 and 1820 L•mol－1,respectively. For QP3Q-Zn2＋, the fluorescence emission peaks are at 436 nm with the quantum yield of 0.26 in methanol and 472 nm for the solid sample. The maximum wavelengths of the fluorescence of QP3Q-Al3＋ are at 486 nm with quantum yield of 0.11 in methanol and 476 nm for its powder. The fluorescence of the complexes shows two exponential decay processes and the lifetimes for the main component are 44.8 and 11.3 ns for QP3Q-Zn2＋ and QP3Q-Al3＋, respectively.
- 8-hydroxyquinoline derivative;Metal complex;Luminescence spectra
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