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Halogen-free chelat...
Halogen-free chelated orthoborate ionic liquids and organic ionic plastic crystals
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- Shah, Faiz Ullah (författare)
- Luleå tekniska universitet,Industriell miljö- och processteknik
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- Glavatskih, Sergei (författare)
- System and Component Design, KTH, Royal Institute of Technology
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- Dean, Pamela M. (författare)
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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visa fler...
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- MacFarlane, Douglas R. (författare)
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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- Forsyth, Maria (författare)
- Department of Materials Engineering, Monash University
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- Antzutkin, Oleg (författare)
- Luleå tekniska universitet,Industriell miljö- och processteknik
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visa färre...
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(creator_code:org_t)
- 2012
- 2012
- Engelska.
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Ingår i: Journal of Materials Chemistry. - 0959-9428 .- 1364-5501. ; 22:14, s. 6928-6938
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Five halogen-free orthoborate salts comprised of three different cations (cholinium, pyrrolidinium and imidazolium) and two orthoborate anions, bis(mandelato)borate and bis(salicylato)borate, were synthesised and characterised by DSC, X-ray diffraction and NMR. DSC measurements revealed that glass transition points of these orthoborate salts are in the temperature range from −18 to −2 °C. In addition, it was found that [EMPy][BScB] and [EMIm][BScB] salts have solid–solid phase transitions below their melting points, i.e. they exhibit typical features of plastic crystals. Salts of the bis(salicylato)borate anion [BScB]− have higher melting points compared with corresponding salts of the bis(mandelato)borate anion [BMB]−. Single crystal X-ray diffraction crystallography (for [Chol][BScB] crystals) and solid-state multinuclear (13C, 11B and 15N) NMR spectroscopy were employed for the structural characterisation of [Chol][BScB], [EMPy][BScB] and [EMIm][BScB], which are solids at room temperature: a strong interaction between [BScB]− anions and [Chol]+ cations was identified as (i) hydrogen bonding between OH of [Chol]+ and carbonyl groups of [BScB]− and (ii) as the inductive C–Hπ interaction. In the other salt, [EMIm][BScB], anions exhibit ππ stacking in combination with C–Hπ interactions with [EMIm]+ cations. These interactions were not identified in [EMPy][BScB] probably because of the lack of aromaticity in cations of the latter system. Our data on the formation of a lanthanum complex with bis(salicylato)borate in the liquid mixture of La3+(aq) with [Chol][BScB] suggest that this class of novel ILs can be potentially used in the extraction processes of metal ions of rare earth elements.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Chemistry of Interfaces
- Gränsytors kemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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