合成了九种三脲脲(L 1 -L 9),并通过1 H NMR滴定技术和单晶X射线结构分析显示与三价阴离子客体配位。已经显示出该化合物能够在低转运蛋白负载下介导跨越POPC或POPC:胆固醇7:3囊泡双层膜的氯化物和硝酸盐以及氯化物和碳酸氢盐的交换。阴离子转运对阳离子的性质一个有趣的依赖是证据表明,A M + /氯-共转运过程也可能导致氯化物从囊泡释放。
Sandwich-type phosphate complexes were formed by macrocyclicligands incorporating both anion- (tris-urea unit) and cation-binding sites (polyether), which display a reversible rotation around the anion upon protonation/deprotonation of phosphate and binding of the cation (Emim+).
Chloride Coordination by Oligoureas: From Mononuclear Crescents to Dinuclear Foldamers
作者:Biao Wu、Chuandong Jia、Xiaolei Wang、Shaoguang Li、Xiaojuan Huang、Xiao-Juan Yang
DOI:10.1021/ol2031153
日期:2012.2.3
A series of acyclic oligourea receptors which closely resemble the scaffolds and coordination behavior of oligopyridines have been synthesized. Assembly of the receptors with chloride ions afforded mononuclear anion complexes or dinuclearfoldamers depending on the number of the urea groups.
A fully complementary, high-affinity receptor for phosphate and sulfate based on an acyclic tris(urea) scaffold
作者:Chuandong Jia、Biao Wu、Shaoguang Li、Zaiwen Yang、Qilong Zhao、Jianjun Liang、Qian-Shu Li、Xiao-Juan Yang
DOI:10.1039/c0cc00937g
日期:——
A fully complementary tris(urea) receptor for phosphate and sulfate anions has been developed by mimicking the scaffold of terpyridine which shows very high affinities and selectivities toward the tetrahedral anions.
Anion binding vs.sulfonamide deprotonation in functionalised ureas
作者:Claudia Caltagirone、Gareth W. Bates、Philip A. Gale、Mark E. Light
DOI:10.1039/b713431b
日期:——
Sulfonamide groups, commonly used as neutral hydrogen bond donors in a wide variety of anion receptors, deprotonate upon addition of certain basic anionic guests in two simple functionalised ureas.
Conformational Control of Selectivity and Stability in Hybrid Amide/Urea Macrocycles
作者:Simon J. Brooks、Sergio E. García-Garrido、Mark E. Light、Pamela A. Cole、Philip A. Gale
DOI:10.1002/chem.200601647
日期:2007.4.16
properties of two similar hybrid amide/ureamacrocyclescontaining either a 2,6-dicarboxamidophenyl or a 2,6-dicarboxamidopyridine group are compared. Significant differences in anion affinity and mode of interaction with anions are attributed to the presence of intramolecular hydrogen bonds in the pyridine system. In fact, remarkably, the phenyl macrocycle undergoes amide hydrolysis under neutral conditions