Search results
Results from the WOW.Com Content Network
When the protein host is an enzyme, the guests are called substrates. While these concepts are well established in biological systems, the applications of synthetic host-guest chemistry remains mostly in the realm of aspiration. One major exception, being zeolites where host-guest chemistry is their raison d'etre.
Static molecular recognition is likened to the interaction between a key and a keyhole; it is a 1:1 type complexation reaction between a host molecule and a guest molecule to form a host–guest complex. To achieve advanced static molecular recognition, it is necessary to make recognition sites that are specific for guest molecules.
Coordination cages are used to study guest-guest and host–guest interactions and reactions. In some instance, planar aromatic molecules stack inside of metalloprisms, as can be observed by UV-visible spectroscopy. Metal-metal interactions can also be observed. [15] Mixed valence species have also been trapped inside of coordination cages. [15]
Molecular tweezers, and molecular clips, are host molecules with open cavities capable of binding guest molecules. [3] The open cavity of the molecular tweezers may bind guests using non-covalent bonding, which includes hydrogen bonding , metal coordination , hydrophobic forces , van der Waals forces , π–π interactions , and/or ...
A supramolecular host could bind to a guest molecule in such a way that the guest's labile group is positioned close to the reactive group of another reactive species. The proximity of the two groups enhances the probability that the reaction could occur and thus the reaction rate is increased.
As of March, 2011, BindingDB contains about 650,000 binding data, for 5,700 protein targets and 280,000 small molecules. BindingDB also includes a small collection of host–guest binding data of interest to chemists studying supramolecular systems.
Crystal structure of a nitrobenzene bound within a hemicarcerand reported by Cram and coworkers in Chem. Commun., 1997, 1303-1304.. In host–guest chemistry, a carcerand (from Latin carcer 'prison') is a host molecule that completely entraps its guest (which can be an ion, atom or other chemical species) so that it will not escape even at high temperatures. [1]
Cyclobis(paraquat-p-phenylene) is able to incorporate small guest molecules forming a host–guest complex. The interactions required for complex formation are donor-acceptor interactions and hydrogen bonding, their strength is highly dependent on the ability of the donor to provide π-electron density. Also an enlargement of the π-system ...