Formation of radicals in irradiated maltose – the role of hydrogen bonding with water

Abstract

The EPR spectra of irradiated maltose were obtained and compared to those of sucrose and glucose. In maltose anhydrite, the main radicals were produced from the cleavage of the glycoside bond at the C1 carbon with a carbonyl at the C2 carbon the same as those in sucrose. On the contrary, a carbonyl anion radical involving the proton hydrogen bonding to a water molecule was also observed in maltose monohydrate. The conformation of the carbonyl anion radical changed and became stable.

Keywords:

• Maltose
• hydrogen bond
• irradiation
• EPR
• radical

Disclosure statement

The author declares that she has no known competing financial interests or personal relationship that could have appeared to influence the work reported in this paper.

Additional information

Funding

This study was partially supported financially by a Grant-in-Aid for Science Research C [19K05343] from The Japan Society for the Promotion of Science (JSPS).