Pregled bibliografske jedinice broj: 887783
Diffusion of nitroxide radical in imidazolium-based ionic liquids with different alkyl chain lengths
Diffusion of nitroxide radical in imidazolium-based ionic liquids with different alkyl chain lengths // Solid-State Science & Research : Book of Abstracts and Programme / Juribašić Kulcsár, Marina ; Halasz, Ivan (ur.).
Zagreb: Institut Ruđer Bošković, 2017. str. 89-89 (poster, domaća recenzija, sažetak, znanstveni)
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Naslov
Diffusion of nitroxide radical in imidazolium-based ionic liquids with different alkyl chain lengths
Autori
Merunka, Dalibor ; Perić, Miroslav
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Solid-State Science & Research : Book of Abstracts and Programme
/ Juribašić Kulcsár, Marina ; Halasz, Ivan - Zagreb : Institut Ruđer Bošković, 2017, 89-89
ISBN
978-953-7941-15-4
Skup
Solid-State Science & Research Meeting
Mjesto i datum
Zagreb, Hrvatska, 28.06.2017. - 30.06.2017
Vrsta sudjelovanja
Poster
Vrsta recenzije
Domaća recenzija
Ključne riječi
electron paramagnetic resonance ; nitroxide radical ; ionic liquids ; diffusion
Sažetak
We applied electron paramagnetic resonance (EPR) to study dynamics of nitroxide radical in four imidazolium-based ionic liquids (ILs) with different alkyl chain lengths. The nitroxide radical was perdeuterated 2, 2, 6, 6-tetramethyl-4-oxopiperidine-1-oxyl (pDTEMPONE), which was dissolved in 1-alkyl-3-methylimidazolium tetrafluoroborate ILs ([Cnmim][BF4]) with ethyl (n=2), butyl (n=4), hexyl (n=6), and octyl (n=8) groups. The rotational diffusion of pDTEMPONE was studied by analyzing EPR spectra at low radical concentration [1], while the translational diffusion was studied by analyzing changes in EPR spectra as a function radical concentration [2]. The obtained rotational and translational diffusion coefficients exhibit different dependences on alkyl chain length (Fig. 1), which could reflect the aggregation of alkyl chains into domains for ILs with n≥4. Such an aggregation was previously indicated by X-ray diffraction measurements [3]. Figure 1 Temperature dependences of the rotational and translational diffusion coefficients of pDTEMPONE in the ionic liquids [Cnmim][BF4] with n=2, 4, 6, and 8. [1] D. Merunka, M. Peric, M. Peric, J. Phys. Chem. B 119 (2015) 3185. [2] D. Merunka, M. Peric, J. Phys. Chem. B, in press, DOI: 10.1021/acs.jpcb.7b02550. [3] A. Triolo, O. Russina, H. J. Bleif, E. Di Cola, J. Phys. Chem. B 111 (2007) 4641.
Izvorni jezik
Engleski
Znanstvena područja
Fizika, Kemija
POVEZANOST RADA
Projekti:
IP-2013-11-1108 - Karakterizacija niskotemperaturne molekulske dinamike sustava s neuređenom rešetkom metodom ESR (DESiRe) (Ilakovac Kveder, Marina, HRZZ - 2013-11) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb
