Circular Dichroism
Circular dichroism (CD) refers to the differential absorption of left and right circularly polarized light. This phenomenon was discovered by Jean-Baptiste Biot, Augustin Fresnel, and Aimé Cotton in the first half of the 19th century. It is exhibited in the absorption bands of optically active chiral molecules. CD spectroscopy has a wide range of applications in many different fields. Most notably, UV CD is used to investigate the secondary structure of proteins. UV/Vis CD is used to investigate charge-transfer transitions. Near-infrared CD is used to investigate geometric and electronic structure by probing metal d→d transitions. Vibrational circular dichroism, which uses light from the infrared energy region, is used for structural studies of small organic molecules, and most recently proteins and DNA.
Read more about Circular Dichroism: Application To Biological Molecules, Experimental Limitations
Other articles related to "circular dichroism":
... At the quantum mechanical level, the information content of circular dichroism and optical rotation are identical ...
... Circular dichroism (CD) is the differential absorption of left- and right-handed circularly polarized light ... Circular dichroism is the basis of a form of spectroscopy that can be used to determine the optical isomerism and secondary structure of molecules ... As a consequence, circular dichroism is exhibited by most biological molecules, because of the dextrorotary (e.g ...
... Circular dichroism is one of the most general and basic tools to study protein folding ... Circular dichroism spectroscopy measures the absorption of circularly polarized light ...
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—Sir Walter Raleigh (1552–1618)