In fact along with the compatibility of size and shape between bCD host and guest molecule
the inclusion complexation also depends upon the substitution of included cavity water molecule by the less polar guest in aqueous medium.
A clathrate is a structure in which a primary molecular species (say water, or H2O) forms a crystalline 'cage' to contain a guest molecule
(methane or CH4, for example.
The type of structure formed is dependent on the guest molecule
size, structure I hydrates are more prevalent in natural gas flows because they form with methane, ethane and carbon dioxide molecules.
In other words, clathrate hydrates are clathrate compounds in which the host molecule is water and the guest molecule
is typically a gas or liquid.
The new process involved introducing a guest molecule
- in this case a 'buckyball' or C60 - on to a surface patterned by an array of tetracarboxylic acid molecules.
with different stoichiometry depending on the size of the guest molecule
Au nanoparticles coated with these calixarene heterodimer capsules leads to distinct surface plamon resonances whose spectral position depends on the dielectric constant of the guest molecule
where C is cyclodextrin, S is a guest molecule
, and C S x is a cyclodextrin-guest molecule
The molar ratio of host mineral to guest molecule
was 1:6 in all samples.
The encapsulation of the guest molecule
actually modifies its physical and chemical properties, resulting in a natural biopolymer.
AY-CD has a toroidal shape with a hydrophobic internal cavity and hydrophilic external surface which allows the guest molecule
of appropriate size to be included.
The stabilization resulting from the guest molecule
is postulated to be caused by Vanderwaal's forces, which is the attraction between molecules that is not a result of electrostatic attraction.