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本文用电导滴定法研究了冠醚与镧系盐在甲醇、乙醇和乙腈溶剂中的络合反应。实验确定了络合物中镧系元素(Ⅲ)与冠醚的摩尔比;计算了络合物稳定常数;讨论了匹配效应、冠醚环上取代基、阴离子及溶剂对稳定性的影响。
In this paper, the conductance titration method was used to study the complexation of crown ether and lanthanide salts in methanol, ethanol and acetonitrile. The molar ratios of lanthanides (Ⅲ) to crown ethers were determined experimentally. The stability constants of complexes were calculated. The matching effects, the substituents of crown ethers rings, anions and solvents on the stability were discussed.