Association Thickener by Host-Guest Interaction of β-Cyclodextrin Polymers and Guest Polymers

Cyclodextrin Rotaxanes and Polyrotaxanes

“…Poly(maleic acid- alt -isobutene) with pending tert -butylanilide groups was also compexed by β-CD. The binding constant of this guest polymer, K s = 25900 M -1 , was nearly identical to that of the corresponding monomer, tert -butylaniline. , …”

Cucurbit[n]uril-Immobilized Sensor Arrays for Indicator-Displacement Assays of Small Bioactive Metabolites

“…Normally, host–guest supramolecular systems dissociate upon dilution, and the kinetics of guest dissociation is on the order of ∼1 s, so the system should quickly equilibrate upon dilution, , especially when only a monolayer of molecules patterned in the surface-bound microarray is exposed to 20 μL of the buffer . However, the persistence of fluorescence in the microarrays during PBS incubation shows that the indicators did not dissociate this quickly from surface-immobilized CB n .…”

“…Normally, host−guest supramolecular systems dissociate upon dilution, and the kinetics of guest dissociation is on the order of ∼1 s, so the system should quickly equilibrate upon dilution, 52,55 especially when only a monolayer of molecules patterned in the surface-bound microarray is exposed to 20 μL of the buffer. 56 However, the persistence of fluorescence in the microarrays during PBS incubation shows that the indicators did not dissociate this quickly from surface-immobilized CBn. The reason for this interesting phenomenon may be the increased binding affinity or equilibrium constant of the dye to the host at the interfaces, where the dielectric strength of water is reduced and thus hydrogen bonding and electrostatic interactions for the guest/host system are enhanced, which was discovered in the research of the molecular recognition of guanidinium/phosphate pairs.…”

Supramolecular polymer assembly in aqueous solution arising from cyclodextrin host–guest complexation

“…6 . Such network formation is exemplified by the research of Wenz et al in which mixtures of poly(maleic acid)- co -(isobutene) copolymers substituted with either β-CD or 4- tert -butylanilide form viscous aqueous solutions as host–guest complexation between these substituents form a polymer network [ 52 – 53 ]. Gosselet et al [ 54 – 55 ] and Cammas et al [ 56 ], respectively, mixed the adamantyl-substituted N , N -dimethylacrylamide hydroxyethylmethacrylate and β-malic acid-co-ethyladamantyl β-malate copolymers with β-CD-substituted-epichlorohydrin copolymers to obtain highly viscous solutions as a result of polymer network formation occurring through host–guest complexation between the β-CD and adamantyl substituents of the polymers.…”