7373-27-5Relevant articles and documents
C3-Symmetric, amino acid based organogelators and thickeners: a systematic study of structure-property relations
de Loos, Maaike,van Esch, Jan H.,Kellogg, Richard M.,Feringa, Ben L.
, p. 7285 - 7301 (2007)
A class of C3-symmetric amino acid based organogelators and thickeners featuring a rigid core have been developed. Structural variation yielded a number of compounds, the aggregation behaviour and resulting aggregates and gels of which were studied by FTIR spectroscopy, dropping ball measurements, differential scanning calorimetry and transmission electron microscopy. These studies showed that the nature of the core unit, the type of hydrogen-bonding units and the applied amino acids have a strong influence on the interactions, resulting in large differences in aggregation properties, thermal stability and morphology between the various compounds. The results provide a basis for a better understanding of the relation between aggregate/gel properties and molecular structure. The structural variation available for these compounds allows fine-tuning of the gelators with respect to aggregation behaviour and gel properties.
Preferred Binding of Carboxylates by Chiral Urea Derivatives Containing α-Phenylethyl Group
Cortés-Hernández, Mayra,Rojas-Lima, Susana,Hernández-Rodríguez, Marcos,Cruz-Borbolla, Julián,López-Ruiz, Heraclio
, p. 416 - 424 (2016/07/06)
An efficient, simple protocol for the synthesis of a new family of chiral ureas 1 – 4 is described. The binding properties of 1 – 4 toward different anion (acetate, benzoate, fluoride, and chloride) have been studied by1H-NMR titration and have been observed in the case of 4 is a selective receptor for acetate. The theoretical calculation M06/6-311+G(d,p) helped us explain the binding properties observed. The most interesting observation is that this calculated structure is consistent with expected, based on the concept of allylic 1,3-strain (A1,3strain). When chiral caboxylates were studied, urea 1 was the best in discriminating between enantiomers.
Synthesis, crystal structure and gas uptake properties of a urea-functionalized rht-type metal-organic framework
Li, Qiu-Yan,Quan, Ying,Wei, Wei,Li, Jian,Lu, Han,Ni, Rui,Wang, Xiao-Jun
, p. 1 - 6 (2015/07/07)
A hexatopic C3-symmetrical 5,5′,5″-(((benzene-1,3,5-triyltris(azanediyl))tris(carbonyl))tris-(azanediyl))triisophthalic acid (H6-1) linker containing tri-urea groups has been designed and synthesized through the reaction between 1,3,