Intermittent compression of N-alkyl-N,N-dimethylamine N-oxides encapsulated in a container with bis[2]catenane topology

A Metal–Organic Framework Based on a Tetra-Arylextended Calix[4]pyrrole Ligand: Structure Control through the Covalent Connectivity of the Linker

“…The calculated PC value is slightly larger than the 55% value described by Rebek et al as an ideal value for encapsulation complexes in solution and in nonpolar cavities . We have observed PC values as large as 75% for encapsulation complexes of N -oxides in calix[4]­pyrrole-based capsules . The existence of strong polar interactions between the cargo and the container allows PC values larger than the ideal 55% in the resulting encapsulation complexes.…”

“…27 We have observed PC values as large as 75% for encapsulation complexes of N-oxides in calix [4]pyrrole-based capsules. 28 The existence of strong polar interactions between the cargo and the container allows PC values larger than the ideal 55% in the resulting encapsulation complexes.…”

“…The analysis of the volume complementary for the two hemispheres in the dimeric metallocapsular assembly (DMF) 2 @C3 (Figure 7) produced calculated PC values of 70%, which are near the maximum of the ideal PC range determined for thermodynamically stable encapsulation complexes of polar molecules. 28 Unfortunately, using identical experimental conditions but replacing DMF by DEF as solvent in the solvothermal assembly of L3 mediated by Cu II did not produce any crystalline metal−organic solid.…”

Mechanically interlocked molecular handcuffs

“… 62 The co-encapsulation of such guests might allow for the possibility of using this architecture as a vessel for certain chemical reactions. More recent work performed by Ballester and co-workers 64 examined the use of the calix[4]arene/calix[4]pyrrole handcuff to encapsulate a series of alkylated N , N -dimethylamine N -oxide guests where the non-methyl alkyl group varied in length from C1 to C10. Smaller N -oxides were co-encapsulated with a solvent molecule which would occupy the calixarene hemisphere; larger N -oxide molecules occupied the entire cavity by themselves, with the alkyl chain undergoing severe coiling to fit into the capsule.…”

Molecular recognition of pyrazine N,N′-dioxide using aryl extended calix[4]pyrroles

“…4,4 0 -bipyridine N,N 0 -dioxide) to stabilise C4P dimers or direct the self-assembly of C4P-based capsules. [19][20][21][22][23][24] Inspired by these efforts, our group recently prepared a stimuli-responsive supra-amphiphile in water that relies on host-guest interactions between a water-soluble C4P derivative and a tetraphenylethene (TPE)-derived pyridine bis-N-oxide. 25 In principle, PZDO is one of the smallest aromatic bis-Noxides.…”