中文摘要：

合成了开链冠醚Schiff碱配体H2L（H2L=N,N′-双（邻羟苯亚甲基）-3,6-二氧杂-1,8-二氨基辛烷）.详细研究了该配体在不同溶剂中和过渡金属离子存在下的荧光光谱,探讨了溶剂极性和不同金属离子对其荧光光谱的影响.结果表明：溶剂的极性和金属离子对其荧光性质有较大影响,随着溶剂极性的减小,配体的荧光增强,且谱峰发生蓝移.金属离子Zn2＋、Cd2＋对配体具有荧光增敏作用,Ni2＋、Cu2＋具有荧光猝灭作用.探讨了配体与金属离子结合的pH范围,结果显示最佳pH值为7—8.

英文摘要：

A ligand containing open-chain crown ether Schiff base, N, N＇-bis（salicylidene）-3,6- dioxa-1, 8-diaminooctane （HzL）, was synthesized. Its fluorescent properties in various organic sol- vents and the presence of transition metallic ions （Zn^2＋ , Cd^2＋ , Cu^2＋ and Ni^2＋ ） were investigated in detail. The effects of different solvents and the transition metallic ions on the fluorescent spectra of the ligand were discussed. The results show that solvents and prescence of transition metallic ions have great influence on the fluorescent property of the ligand. The weaker the solvent polarity is, the stronger the fluorescent intensity changes, and the fluorescence peak is blue-shifted. The prescence of Zn^2＋ and Cd2. can enhance the fluorescent intensity of the ligand, but the prescence of Cu^2＋ and Ni^2＋ can quench its fluorescence. The effect of pH on the interaction of transition ions with the ligand was investigated, and the optimal pH value is 7--8.