三(2-烷氧基-5-脲基-苯基)甲烷代表一种新型的自互补基序,可在非极性非质子溶剂中形成氢键键合的均聚物和杂二聚物,如1 H NMR和ESI-质谱以及异二聚物的形成所证明。MD模拟表明,与NMR数据一致,形成了不同强度的氢键。二聚化不会干扰四脲杯[4]芳烃的二聚化。因此,可以使用两个主题的组合来通过自组装过程构建更大的结构。[结构:见文字]
三(2-烷氧基-5-脲基-苯基)甲烷代表一种新型的自互补基序,可在非极性非质子溶剂中形成氢键键合的均聚物和杂二聚物,如1 H NMR和ESI-质谱以及异二聚物的形成所证明。MD模拟表明,与NMR数据一致,形成了不同强度的氢键。二聚化不会干扰四脲杯[4]芳烃的二聚化。因此,可以使用两个主题的组合来通过自组装过程构建更大的结构。[结构:见文字]
Carbamoylmethylphosphinoxide Derivatives Based on the Triphenylmethane Skeleton. Synthesis and Extraction Properties
作者:Valentyn Rudzevich、Dieter Schollmeyer、Damien Braekers、Jean F. Desreux、Romain Diss、Georges Wipff、Volker Böhmer
DOI:10.1021/jo050717a
日期:2005.7.1
Two different strategies were used to synthesize tri(2-alkoxy-5-nitrophenyl)methanes 6a,b. The X-ray structures of 6a and its precursor 5 show the molecules in a conformation with a syn-orientation of the nitro and alkoxy groups. Hydrogenation and acylation by the appropriate active ester gave the corresponding tri-CMPO derivatives 4a,b. Their ability to complex lanthanide ions was studied by NMR spectroscopy and by nuclear magnetic relaxation dispersion and further characterized by quantum mechanical calculations. Extraction experiments from acidic solution to dichloromethane reveal a reasonable selectivity of Am(III) over Eu(III), but in contrast to similar tetra-CMPOs derivatives of calix[4]arenes the distribution coefficients strongly decrease with increasing concentration of HNO3.