6533b830fe1ef96bd1297a68

RESEARCH PRODUCT

A Self-Sorting Scheme Based on Tetra-Urea Calix[4]arenes

Fabian KlautzschYuliya RudzevichValentyn RudzevichChristoph A. SchalleyVolker Böhmer

subject

Steric effectsbiologyHydrogen bondSupramolecular chemistryGeneral Chemistrybiology.organism_classificationCatalysischemistry.chemical_compoundchemistryCalixarenePolymer chemistryUreaTetraOrganic chemistrySelf-assemblyStoichiometry

description

Size and shape do matter: When dimerized in nonpolar solvents, an equimolar mixture of eleven tetra-urea calix[4]arenes with different wide-rim substituents self-sorts into only six out of 35 different homo- and heterodimers (see picture). Since the calixarene scaffold and the four urea units are the same in all cases, the self-sorting process is driven only by the cooperative action of steric requirements and stoichiometry.

https://doi.org/10.1002/anie.200805754