Halogen-free chelated orthoborate ionic liquids and organic ionic plastic crystals Shah, Faiz Ullah, Glavatskih, Sergei, Dean, Pamela M., MacFarlane, Douglas R., Forsyth, Maria and Antzutkin, Oleg N. 2012, Halogen-free chelated orthoborate ionic liquids and organic ionic plastic crystals, Journal of materials chemistry, vol. 22, no. 14, pp. 6928-6938. Attached Files Name Description MIMEType Size Downloads Title Halogen-free chelated orthoborate ionic liquids and organic ionic plastic crystals Author(s) Shah, Faiz Ullah Glavatskih, Sergei Dean, Pamela M. MacFarlane, Douglas R. Forsyth, Maria orcid.org/0000-0002-4273-8105 Antzutkin, Oleg N. Journal name Journal of materials chemistry Volume number 22 Issue number 14 Start page 6928 End page 6938 Total pages 11 Publisher Royal Society of Chemistry Place of publication Cambridge, England Publication date 2012-04-14 ISSN 0959-9428 1364-5501 Keyword(s) physicochemical properties electronic-structure materials science nmr-spectroscopy hydrogen-bonds carbon-dioxide temperature salts imidazolium extraction Summary 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. Language eng Field of Research 030399 Macromolecular and Materials Chemistry not elsewhere classified 030604 Electrochemistry Socio Economic Objective 970109 Expanding Knowledge in Engineering HERDC Research category C1 Refereed article in a scholarly journal Persistent URL http://hdl.handle.net/10536/DRO/DU:30049607 Document type: Journal Article Collections: Institute for Frontier Materials GTP Research Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Thu, 29 Nov 2012, 08:06:24 EST Wed, 05 Dec 2012, 09:42:34 EST Wed, 05 Dec 2012, 09:44:00 EST Tue, 28 May 2013, 15:31:37 EST Tue, 28 May 2013, 15:44:23 EST Fri, 13 Jun 2014, 16:11:00 EST Wed, 21 Oct 2015, 17:54:53 EST Filtered Full Citation counts:   Cited 29 times in TR Web of Science Cited 30 times in Scopus Search Google Scholar Access Statistics: 702 Abstract Views, 4 File Downloads  -  Detailed Statistics Created: Thu, 29 Nov 2012, 08:06:24 EST