What is the Difference Between Clathrates and Cyclodextrin?

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The key difference between clathrates and cyclodextrins is that clathrates consist of a lattice that can trap or contain molecules, whereas cyclodextrins are a family of cyclic oligosaccharides that consist of a macrocyclic ring.

Clathrates are chemical substances that form a lattice structure, which can completely envelop guest molecules. They can be divided into two categories: clathrate hydrates and inorganic clathrates. Clathrate hydrates are derived from organic hydrogen-bonded frameworks, and most common clathrate crystal structures can be composed of cavities such as dodecahedral, tetrakaidecahedral, and hexakaidecahedral cavities.

Cyclodextrins, on the other hand, are a family of cyclic oligosaccharides that consist of a macrocyclic ring having glucose units connected by α-1,4 bonds with a β-1,4 branching point. Cyclodextrins have various applications, including:

  • Ingredients in many approved medicines such as hydrocortisone, prostaglandin, nitroglycerin, itraconazol, and chloramphenicol.
  • Chromatography, where β-cyclodextrin is important in producing a stationary phase for HPLC instruments.
  • Encapsulating ethanol to produce alcohol powder and binding fragrances.

Comparative Table: Clathrates vs Cyclodextrin

The main difference between clathrates and cyclodextrins is their structure and composition. Here is a table comparing the two:

Property Clathrates Cyclodextrins
Definition Clathrates are chemical compounds that consist of a lattice that can trap or contain molecules. Cyclodextrins are a family of cyclic oligosaccharides that consist of a macrocyclic ring of sugar molecules.
Structure Clathrates have a lattice structure that can completely envelop guest molecules, forming host-guest complexes or inclusion compounds. Cyclodextrins have a cyclic structure with a hydrophobic interior and a hydrophilic exterior, forming a cavity that can encapsulate guest molecules.
Types Clathrate compounds can be polymeric compounds, and some inorganic polymers like zeolites are also considered clathrate compounds. Cyclodextrins are derivatives of starch and are produced by enzymatic action on amylose.
Applications Clathrates can be used in molecular recognition, gas storage, and separation processes. Cyclodextrins are used in analytical separation science, materials science, and biomedicine due to their unique hydrophobic-hydrophilic structure.

In summary, clathrates are chemical compounds with a lattice structure that can trap or contain molecules, while cyclodextrins are a family of cyclic oligosaccharides with a macrocyclic ring structure that can encapsulate guest molecules within their cavity.