Synthesis, structural characterization and extraction studies of 17-, 18-, 19- and 20-membered N2O2-donor macrocyclic Schiff bases
作者:Tomislav Balić、Brunislav Matasović、Berislav Marković、Anamarija Šter、Marija Štivojević、Dubravka Matković-Čalogović
DOI:10.1007/s10847-016-0621-4
日期:2016.8
the differences in macrocycle planarity. The extraction experiments of the aforementioned compounds were performed by using metallic picrate salts, and simultaneously for the previously synthesized 17- and 18- membered macrocyclic analogues (m2 and m1). The metal cation extractability was determined for m1, m2, m3 and m4 by UV–Vis spectrophotometry in order to find correlation of structural features
两个新的大环席夫碱 m3 和 m4(m3 = 1,5-diaza-2,4:7,8:17,18-tribenzo-9,16-dioxa-cyclononadeca-1,5-dien;m4 = 1,5 -diaza-2,4:7,8:18,19-tribenzo-9,17-dioxa-cycloeicosa-1,5-dien) 通过适当的二醛和二胺的反应合成。通过FT-IR和NMR光谱、TG/DSC和元素分析对化合物进行表征。通过单晶X射线衍射法测定晶体和分子结构。两种分子都是 N2O2 供体大环席夫碱,在其内部大环中具有 19 和 20 个原子,并且具有相似的分子结构。分子的不同晶体堆积排列是由大环平面度的差异引起的。上述化合物的提取实验采用苦味酸金属盐进行,同时对于先前合成的 17 和 18 元大环类似物(m2 和 m1)。通过紫外-可见分光光度法测定 m1、m2、m3 和 m4 的金属阳离