Synthesis of novel functional ionic liquids and their application in biomass |
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| Authors: | Hui-Ying Han Xin Geng Bi-Xian Zhang Jing Meng Xin Liu Xin-Miao He Zi-Guang Liu Yun-Fei Gao Di Liu Xiao-Mei Hu |
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| Affiliation: | College of Life Sciences, Northeast Agricultural University, Harbin 150030 China.; Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agricultural and Rural Affairs, Harbin 150086 China.; Heilongjiang Academy of Agricultural Sciences, Harbin 150086 China |
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| Abstract: | A series of dicationic ionic liquids (ILs) including [PF6][(PYR)C4(MIM)][Cl], [PF6][(PYR)C4(PYR)][Cl], [PF6][(PYR)C5(MIM)][Cl], and [PF6][(PYR)C5(PYR)][Cl], and monocationic ILs including [(PYR)C4Cl][PF6], [(PYR)C5Cl][PF6], [(MIM)C2COOH][PF6] and [(PYR)C2COOH][PF6] were synthesized. Their thermal stability and melting points were determined. Their solubility with organic solvents and the miscibility with water were investigated. These functional ILs are hydrophilic at high temperatures and they are hydrophobic at low temperatures, which enable the effective isolation of the resulting reducing sugar. High yields of reducing sugar were obtained for corn stalk after 8 h (20.73%) and potato starch after 6 h (72.50%) by the treatment with the mixture of [PF6][(PYR)C4(PYR)][Cl] and [(PYR)C2COOH][PF6]. The reuse of dicationic and monocationic ILs was successfully performed and no significant reduction in yields of reducing sugar was observed. These functional ILs have important implications in the design of homogeneous and heterogeneous systems with water and organic solvents, which could be used to satisfy some specific applications.A series of dicationic and monocationic ionic liquids (ILs) were synthesized and investigated and it was found that these functional ILs have important implications in the design of homogeneous and heterogeneous systems. |
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