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本文用邻苯二酚经过先桥接后偶联,用愈创木酚、水杨醛经过先偶联后桥接的方法,合成了三类双偶氮开链冠醚1、2和3.方法简便,产率较高.借助于可见光谱的测定,考查了它们在溶液中与碱金属和碱土金属盐等的配位性能.结果表明,1在95:6四氢呋喃-水(v/v)中,对高氯酸锂和高氯酸钙有良好的选择性变色作用.本文对变色作用的反应机理进行了详细的讨论.可以认为,变色作用的产物是分子内配盐.这已由1与高氯酸钙制成的配合物的元素分析、可见光谱和红外光谱的测定所证明.
In this paper, after the first bridging coupling with catechol, with guaiacol, salicylaldehyde coupling after the first bridge after the method of synthesis of the three types of double-azocouple open-chain crown ethers 1,2 and 3. The method is simple , And their yield was high. Their coordination properties with alkali metal and alkaline earth metal salts in solution were investigated by means of visible spectroscopy. The results showed that 1 in 95: 6 tetrahydrofuran-water (v / v) Which has a good selective color change effect on lithium perchlorate and calcium perchlorate.In this paper, the reaction mechanism of discoloration is discussed in detail.It can be considered that the product of discoloration is intramolecularly complexed salt, The elemental analysis of the complexes made from calcium chlorate, as evidenced by the visible and infrared spectra.