期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 1189, 期 -, 页码 272-278出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2019.04.027
关键词
1,10-Phenanthroline; 1,4-Dimethylpiperazine; 1,4-Butane sultone; Heteropoly acid; Ionic liquid catalyst; Reusable catalyst; Esterification reaction
资金
- Research Council of Yasouj University
Three novel heteropolyanion-based Bronsted acidic ionic liquids (BAILs), butane mono sulfoacid-functionalized 1,10-phenanthrolinum, butane mono and bis sulfoacid-functionalized 1,4-dimethylpiperazinium salts of phosphortungstate catalyst (PhBs(1)-PW, [PipBs(1)](3)-PW and [PipBs(2)](3)-(PW)(2)) were synthesized and well characterized with FTIR, H-1 and C-13 NMR, Electro-Spray Ionization Mass Spectrometry (ESI-MS), Elemental analysis (CHNS), EDX and TG analysis techniques. The esterification reactions of monocarboxylic acids with monohydric alcohols were carried out using these catalysts. The introduced catalysts present a self-separation performance after reaction, which can be easily recovered and quite steadily reused as confirmed by six-run recycling test. Moreover, bis sulfoacidfunctionalized 1,4-dimethylpiperazinium salt of phosphortungstate showed the best catalytic performance among the prepared catalysts for the esterification reaction. (C) 2019 Elsevier B.V. All rights reserved.
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