Cyclohexane bis-urea compounds for the gelation of water and aqueous solutions
作者:Maaike de Loos、Arianna Friggeri、Jan van Esch、Richard M. Kellogg、Ben L. Feringa
DOI:10.1039/b500837a
日期:——
the common isocyanate method. Gelation was obtained with organic solvents, water and strongly basic aqueoussolutions like 25% ammonia. Hydrogelation was found to depend on a delicate balance between the hydrophobicity of the alkyl chains, hydrophilicity of the terminal substituents and the enantiomeric purity of the compound. The hydrogels consisted of a network of fibers, in which all urea groups