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Self-Diffusion of Phosphonium Bis(Salicylato)Borate Ionic Liquid in Pores of Vycor Porous Glass
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik.ORCID-id: 0000-0002-6810-1882
Kazan (Volga Region) Federal University, Kazan.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik.ORCID-id: 0000-0003-3652-7798
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.
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2016 (engelsk)Inngår i: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 230, s. 128-134Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

1H NMR pulsed field gradient was used to study self-diffusion of a phosphonium bis(salicylato)borate ionic liquid ([P6,6,6,14][BScB]) in the pores of Vycor porous glass at 296 K. Confinement in pores increases diffusion coefficients of the ions by a factor of 35. However, some [P6,6,6,14][BScB] ions demonstrated apparent diffusion coefficients much lower than their mean values, which may be due to partially restricted diffusion of the ions. We suggest that this fraction corresponds to areas where ions are confined by pore ‘necks’ (micropores) and empty voids. Heating of the ionic liquid / Vycor system at 330 K led to a change in the diffusivity of the ions, because of their redistribution in the pores. The size of the bounded regions is on the order of 1 µm, as estimated from the dependence of the ion diffusivity on the diffusion time.

sted, utgiver, år, opplag, sider
2016. Vol. 230, s. 128-134
Emneord [en]
Ionic liquid, diffusion, porous structure, Chemistry - Physical chemistry
Emneord [sv]
Kemi - Fysikalisk kemi
HSV kategori
Forskningsprogram
Gränsytors kemi; Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-4613DOI: 10.1016/j.micromeso.2016.04.044ISI: 000378661100015Scopus ID: 2-s2.0-84968542987Lokal ID: 29657a03-d69a-499b-941f-b7995f1efb77OAI: oai:DiVA.org:ltu-4613DiVA, id: diva2:977487
Merknad

Validerad; 2016; Nivå 2; 20160508 (andfil)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Filippov, AndreiShah, Faiz UllahGlavatskikh, SergeiAntzutkin, Oleg

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