Solvation and dynamic behavior of cyclodextrins in dimethyl sulfoxide solution

Article Abstract:

A study investigated high-frequency dielectric relaxation behavior up to 20 GHz for plain and methylated cyclodextrins (CDs) in dimethyl sulfoxide (DMSO) solution. It was found that each hydrogen atom of OH groups of the CDs solvated a DMSO molecule for a residence time of 130-180 ps due to the hydrogen bond formation to an oxygen atom of DMSO, and a few DMSO molecules were included in cavities of the CDs for a while similar to the residence time.

Science & research, All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Dimethyl Sulfoxide, Research, Analysis, Hydrogen bonding, Hydrogen bonds, Solvation, Cyclodextrins, Structure, Chemical properties, Breakdown (Electricity)

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Specific anion effects on the optical rotation of [alpha]-amino acids

Article Abstract:

The specific optical rotation of D- and L-enantiomers of alanine, aspartic acid, glutamic acid, glutamine, proline, threonine, and tryptophan are measured in aqueous solutions of a series of some monovalent electrolytes. Specific interactions of anions with the chiral shell are responsible for the effects and conformational changes in the chiral solutes are due to the presence of ionic species.

Electric properties, Glutamate, Optical properties, Amino acids

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