Selective alkaline and earth metal ion encapsulation by two different Lehn-type cryptands, noted as [3.2.1] [4.1.1], was predicted between them compared on the DFT (B3LYP/LANL2DZp) basis set. Since these cryptands are isomers to well-known [2.2.2] cryptand, cation selectivity of all three cages were compared. The ability host adjust their structure successfully accommodate ions, based energy ge...

Dimers of inclusion complexes were formed from a new cryptand and viologens (paraquats) driven by dipole-dipole and face-to-face pi-stacking interactions as shown by mass spectrometric characterization and X-ray analysis.

A hexacarboxamide cryptand featuring appended polyether moieties is used as a binucleating ligand for two Co(II) centers, marking the first time cryptands have been used as hexaanionic N donors for metal coordination. A synthesis for the hexacarboxamide cryptand, culminating in a 23% yield high-dilution step and proceeding in 8% overall yield, is reported. The ligand is metalated using cobalt(I...

Based on the complexation between bis(m-phenylene)-32-crown-10-based cryptands and a paraquat derivative, two [2]rotaxanes were synthesized by using a threading-followed-by-stoppering method. Due to the strong associations between the cryptands and the paraquat derivative, high yields were achieved even in dilute solution.

The first fluorine-containing cryptand F3-T R EN 4 for the complexation of anions was p re ­ pared in the 3 + 2-condensation reaction of 2-fluoro-l,3-phthalaldehyde 3 with tris(2-aminoethyl)am ine and subsequent reduction w ith N aB H 4. U pon incorporation of anionic guests 4 -6 H C 1 0 4 experiences shifts of its 19F N M R resonances and thus dem onstrates the advantages of studying h o s t-g...

Attachment of three different fluorophores to an aza-oxa cryptand (L) gives a transition-metal ion induced two-step fluorescence resonance energy transfer system.

Potassium ion sensors are important for the study of concentration profiles in tissues. The synthesis a cryptand suited potassium ions and crystal structure it with chelated sodium presented.