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在磷酸催化作用下,采用前体二胺N,N’-(2-胺基苯基)-2,6-二甲酰亚胺吡啶(1)和前体二醛1,4-二(2’-甲酰苯氧基)丁烷(2)进行缩合作用得到[1+1]Schiff碱大环化合物3,进一步将Schiff碱大环3还原得到饱和大环4.并采用1H NMR,IR,质谱和元素分析等技术对大环3和4的组成进行了表征.采用X射线单晶衍射技术测定了Schiff碱大环3的晶体结构,结果表明大环3具有扭曲的“8”字形结构.采用UV-vis光谱滴定技术对大环与系列阴离子的键合作用进行了考察,结果表明,Schiff碱大环3对F-离子有明显的选择性识别作用,并测定了该配位反应的配位比和平衡常数.
Under the catalysis of phosphoric acid, the precursor diamine N, N ’- (2-aminophenyl) -2,6- dicarboximide pyridine (1) and the precursor dialdehyde 1,4-di ’- formylphenoxy) butane (2) to give [1 + 1] Schiff base macrocycle 3, further reducing the Schiff base macrocycle 3 to the saturated macrocycle 4 and using 1H NMR, IR, Mass spectrometry and elemental analysis were used to characterize the composition of macrocycles 3 and 4. The crystal structure of Schiff base macrocycle 3 was determined by X-ray single crystal diffraction and the results showed that macrocycle 3 has a distorted “8” Structure.Using UV-vis spectroscopic titration technique, the bonding between the macrocyclic ring and the series of anions was investigated. The results showed that the Schiff base macrocycle 3 has obvious selectivity to F- ion and the coordination reaction The coordination and equilibrium constants.