Oxidative degradation of chitosan by H2O2 in acidic ionic liquid aqueous solutions was written by Wu, Changchun;Zang, Hongjun;Li, Daqing;Zhang, Mingchuan;Yu, Jianchun;Cheng, Bowen. And the article was included in Gaofenzi Cailiao Kexue Yu Gongcheng in 2014.Name: 1-Methyl-1H-imidazol-3-ium chloride This article mentions the following:
In this paper, ionic liquid 1-(4-sulfonic acid) butyl-3-methylimidazolium hydrogen sulfate ([MIMBS]HSO4) with better dissolution performance was selected. The oxidative degradation of high mol. weight chitosan was conducted with H2O2 in the above-mentioned ionic liquid aqueous solution, and the reaction system was homogeneous. In order to optimize the reaction conditions, the influence of dosage of ionic liquid, n (H2O2): n (chitosan), reaction temperature and reaction time on the degradation were studied. The mol. weight of chitosan was determined by viscosity method. The structures of original and degraded chitosan were characterized by FT-IR and XRD. The results indicate that the crystal structures of chitosan are destroyed, and the crystallinity decreases. The oxidative degradation reactions proceed more completely with increasing ionic liquid concentration At the meantime, the increased dosage of H2O2, enhanced reaction temperature and prolonged reaction time also promote this degradation reaction. The optimum conditions are determined as follows: the aqueous solution of 8% [MIMBS]HSO4, n (H2O2): n (chitosan) = 5:1, reaction temperature equal to 80°C and reaction time equal to 3 h. Under the above reaction conditions, the yield of the regenerated chitosan is 74%, and the viscosity-average mol. weight is 21.2 × 103. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Name: 1-Methyl-1H-imidazol-3-ium chloride).
1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Name: 1-Methyl-1H-imidazol-3-ium chloride
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem