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Comparing radical diffusion crossover phenomena in alkanes and alcohols

Slade, Jakov; Merunka, Dalibor; Peric, Miroslav (2023) Comparing radical diffusion crossover phenomena in alkanes and alcohols. Journal of Molecular Liquids, 384 . ISSN 01677322

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We applied electron spin resonance (ESR) to study tracer diffusivities of a nitroxide radical at various temperatures in the normal alkanes (octane to tridecane) and alcohols (methanol to 1-octanol). We studied and compared radical diffusivities in these liquids because their molecules are similar, but alcohols exhibit heterogeneous structures due to the hydrogen bonding of hydroxyl groups, which is absent in alkanes. The crossover temperature behavior of radical diffusivities was found in all liquids by relating radical diffusivities and solvent self-diffusivities. This finding evidences the transformation from a single-molecule diffusion process into a collective process upon temperature lowering. However, the crossover behavior strongly differs in alcohols and alkanes, indicating that the heterogeneous structure of alcohols affects the radical diffusion crossover.

Item Type: Article
Uncontrolled Keywords: tracer diffusivity; self-diffusivity; nitroxide radicals; electron spin resonance; monohydroxy alcohols; heterogeneous structure
NATURAL SCIENCES > Physics > Condensed Matter Physics
NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions: Division of Physical Chemistry
Project titleProject leaderProject codeProject type
Studija važnosti spinskih međudjelovanja kao osnova za nove pristupe u istraživanju materijala-SPESMarina Ilakovac-KvederIP-2018-01-3168HRZZ
Depositing User: Dalibor Merunka
Date Deposited: 08 Feb 2024 09:13
DOI: 10.1016/j.molliq.2023.122220

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