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Oct 5, 2016 · The characteristics of host–guest systems, such as molecular recognition, complexation, encapsulation, guest composition, and dynamic exchange, are manifested by changes in the chemical shifts (Δ ω) in the NMR spectrum.
The composition below is called An unwelcome guest. My student wrote from the point of view of the protagonist but gave her antagonist a more real personality, someone with a past and a glimpse of goodness.
Thinking Factory: here is is an example of a P6 English Composition on the theme of An Unwelcomed Guest from one of our student. Check our website for more examples.
Host–guest complexes can be seen to arise from the coordination of a cationic, anionic, or neutral guest entity within a discrete host molecule or supramolecular host assembly, using noncovalent interactions, such as H-bonds, ionic bonds, van der Waals forces, and hydrophobic interactions.
- Introduction
- Results and Discussion
- Acknowledgements
Considering these aspects, we recently began investigating their solid-state supramolecular chemistry and reported the first structural authentication of carboxylic acid substituted pillararene (CPA5), its basic self-assembly properties and formation of a host–guest complex with active pharmaceutical ingredient tetracaine.8 Our current work is focu...
While the shape of the CPA5 macrocyclic core resembles a regular pentagon, the closer look reveals some deviation from regular Euclidean geometry. For a regular pentagon, the interior angles are 108°, while the sp3 hybridization of the bridging methylene groups in pillararene would favor the bonding angle of 109.28°. The structural strain within th...
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- 2021
Aug 3, 2021 · Host–guest based supramolecular assemblies, as constructed through non-covalent interactions, are highly dynamic in nature, and can be tuned easily using their responses to various external stimuli, providing a convenient approach to achieve excellent functional materials.
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Oct 28, 2020 · A relatively small number of guest molecules with a shorter induction time for pure guest hydrate nucleation can promote the formation of initial nuclei of a mixed hydrate. Detailed cage analysis shows that small guests such as CH 4 can induce the formation of more standard cages for mixture systems with either C 2 H 6 or C 3 H 8 systems ...
