双8-羟基喹啉端开链冠醚金属络合物的光物理性质

设计合成了双8-羟基喹啉端的开链冠醚QP3Q,研究了金属离子铝或锌与其形成络合物的组成和发光性质,并测定了络合物的激发态寿命.这些络合物在溶液中有较高的荧光量子产率,所得到的络合物固体具有较强的蓝光发光性能.结果表明,有可能通过QP3Q与不同离子形成的络合物得到不同发光波长的发光材料.

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

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.