94% of researchers rate our articles as excellent or good
Learn more about the work of our research integrity team to safeguard the quality of each article we publish.
Find out more
ORIGINAL RESEARCH article
Front. Chem.
Sec. Solid State Chemistry
Volume 13 - 2025 | doi: 10.3389/fchem.2025.1540129
This article is part of the Research Topic Mechanochemistry of Molecular Solids View all articles
Kinetics of the mechanochemical transformations in the "glycineoxalic acid dihydrate" system revisited: The role of water
Provisionally accepted
Evgeniy A. Losev 1,2,3,4
Polina Kalinina 2,5
Artem Golomolzin 2 Viktoria Kolesnikova 2
Elena Vladimirovna Boldyreva 1,2,3*- 1 V.S. Sobolev Institute of Geology and Mineralogy (RAS), Novosibirsk, Novosibirsk Oblast, Russia
- 2 Novosibirsk State University, Novosibirsk, Russia
- 3 Boreskov Institute of Catalysis (RAS), Novosibirsk, Novosibirsk Oblast, Russia
- 4 V.V. Voevodsky Institute of Chemical Kinetics and Combustion, SB RAS, Novosibirsk, Russia
- 5 Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Kol'tsovo, Russia
Kinetics of the mechanochemical transformations in the "glycine -oxalic acid dihydrate" system were revisited, in order to compare the results obtained for ball milling of the same reactants in different ball-milling devices. The results obtained in a commercial vibrational mill NARVA Vibrator DDR-GM9458 (ex situ study, this work) were compared with the previously published studies: ex situ in a home-made restricted-impact device and in situ in a Retsch MM400 vibrational mill. Considering the possibility that water released from oxalic acid crystal hydrate may have a significant effect on the mechanochemical transformations, even though it does not enter crystal structures of bis-glycinium oxalate (G2O) and glycinium semioxalate (GO) products, we could explain consistently various facts related to the mechanochemical transformations in this system under different conditions, such as the air humidity, the effect of the frequency of mechanical pulses on the existence of the induction period, the effect of the starting glycine polymorph on the duration of the induction period in case of a high-frequency vibrational ball-milling, or the formation of G2O GO as two competing products, the former dominating at the early stage of treatment as a "kinetic", faster-crystallizing phase, and the latter formed as the only final thermodynamically stable product after a prolonged treatment.
Keywords: Mechanochemical synthesis, Kinetics, ball milling, lag, role of water in ball milling, choice of instrument, induction period of a mechanochemical transformation
Received: 05 Dec 2024; Accepted: 03 Mar 2025.
Copyright: © 2025 Losev, Kalinina, Golomolzin, Kolesnikova and Boldyreva. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Elena Vladimirovna Boldyreva, Novosibirsk State University, Novosibirsk, Russia
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.