Vol. 12, no.1, 2020


Polarimetry as a method for studying the structure of aqueous carbohydrate solutions: correlation with other methods

Anna V. Orlova, Leonid O. Kononov

Zelinsky Institute of Organic Chemistry of RAS, http://zioc.ru/
Moscow 119991, Russian Federation
E-mail: zzzoka@gmail.com, leonid.kononov@gmail.com

Received February 12, 2020; peer reviewed February 18, 2020; accepted February 24, 2020
Abstract. The review provides data indicating that polarimetry is a sensitive tool for studying the structure of aqueous carbohydrate solutions. Using aqueous solutions of D-levoglucosan (1,6-anhydro-D-glucopyranose) as an example, it was demonstrated, using polarimetry, quantum chemical calculations, HPLC, static and dynamic light scattering, that polarimetry allows one to detect changes in the structure of solutions with changes in concentration and temperature, as well as the evolution of the structure of solutions over time. In particular, the phenomenon of the existence of “critical” concentrations and temperatures was discovered at which the specific rotation of the solutions undergo jump-like changes, apparently reflecting rearrangements in the structure of the solution. It is also possible that in the case of aqueous solutions, chiral carbohydrate molecules might act as “probes” that “sense” the slightest changes in their conformation or rearrangement of the environment (in the solvation shell) caused by changes in the structure of water, which at the macroscopic level manifests themselves as change in specific rotation.

Keywords: solution structure, supramers, polarimetry, light scattering, levogluco

UDC 547.455:543.454

RENSIT, 2020, 12(1):95-106. DOI: 10.17725/rensit.2020.12.095.

Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/312/12(1)95-106e.pdf