Naslov
Mechanochemical reaction kinetics scales linearly with impact energy

Autori
Vugrin, Leonarda ; Carta, Maria ; Lukin, Stipe ; Meštrović, Ernest ; Delogu, Francesco ; Halasz, Ivan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Mechanochemistry: Fundamentals, applications and future, Faraday Discussions 241, 217-229 / Stuart, James ; Friščić, Tomislav - Cambridge : Royal Society of Chemistry (RSC), 2023, 217-229

Skup
Mechanochemistry: Fundamentals, applications and future

Mjesto i datum
Cambridge, Ujedinjeno Kraljevstvo, 12.09.2022. - 14.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
oligomerisation ; Raman spectroscopy ; numerical simulations ; kinetic analysis ; nickel complex

Sažetak
Inelastic collisions of the milling media in ball milling provide energy to the reaction mixture required for chemical transformations. However, movement of the milling media also results in physical mixing of reactants, which may enable a chemical reaction too. Separating the two contributions is challenging and gaining a direct insight into the purely mechanochemically driven reactivity is accordingly hindered. Here, we have applied in situ reaction monitoring by Raman spectroscopy to a suitable, purely mechanically activated, chemical reaction and combined kinetic analysis with numerical simulations to access experimentally unattainable milling parameters. The breadth of milling conditions allows us to establish a linear relationship between the reaction rate and the energy dose received by the sample. Consequently, different kinetic profiles in time scale to the same profile when plotted against the energy dose, which increases with the ball mass, the average ball velocity and the frequency of impacts, but decreases with the hardness of the milling media due to more elastic collisions. The fundamental relationship between kinetics and energy input provides the basis for planning and optimisation of mechanochemical reactions and is essential for transferability of mechanochemical reactions across different milling platforms.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA