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Issue 70, 2016, Issue in Progress
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Synthesis and characterization of imidazolium poly(azolyl)borate ionic liquids and their potential application in SO2 absorption

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Abstract

Thirteen new 1,3-substituted imidazolium poly(azolyl)borate salts with the general formula [R1R2im][B(H)4−n(azolyl)n] (R1 = methyl, n-butyl, 2-(diethylamino)ethyl; R2 = methyl; azolyl = pyrazolyl, imidazolyl, 1,2,4-triazolyl, tetrazolyl; n = 2, 3) have been synthesized through salt metathesis of the corresponding imidazolium chloride and potassium poly(azolyl)borates. The newly synthesized dihydrobis(azolyl)borate and hydrotris(azolyl)borate salts are liquids at room temperature except two of the 1,3-dimethylimidazolium derivatives, [mmim][H2B(pz)2] and [mmim][HB(pz)3]. Conductivity, thermal and physicochemical properties of the new borate ionic liquids were systematically investigated. With multiple azolyl groups serving as binding sites, these ionic liquids (ILs) generally exhibit high SO2 absorption capacity (up to 5.8 mol mol−1 of IL or 1.05 g g−1 of IL for 1-methyl-3-n-butylimidazolium hydrotris(imidazolyl)borate, compound 13).

Graphical abstract: Synthesis and characterization of imidazolium poly(azolyl)borate ionic liquids and their potential application in SO2 absorption

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Publication details

The article was received on 21 Apr 2016, accepted on 01 Jul 2016 and first published on 06 Jul 2016


Article type: Paper
DOI: 10.1039/C6RA10356A
RSC Adv., 2016,6, 66078-66086

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    Synthesis and characterization of imidazolium poly(azolyl)borate ionic liquids and their potential application in SO2 absorption

    Y. Zhang, D. Lu, J.-J. Zhang and C. Wu, RSC Adv., 2016, 6, 66078
    DOI: 10.1039/C6RA10356A

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