离子液体中不同阴离子对几丁质催化水解制备乙酰丙酸的影响

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-04-26 DOI:10.1016/j.molliq.2025.127675

Xingfen Huang , Shengbin Shi , Yuanfeng Wu , Guomin Xiao

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引用次数: 0

摘要

合成了一系列以N，N,N ',N ' -四甲基-1,3-丙二基双丙磺酸二铵（TMPDAPS）为基料的离子液体（il），并对其进行了表征。观察到这些离子的哈米特酸度（H0）随阴离子的不同而变化，顺序如下：Cl−<；Br−& lt;TsO−& lt;CH3SO3−& lt;就是HSO4−& lt;1, 5-NS−。热重分析表明，这些il具有良好的热稳定性。随后，这些il被用作几丁质水解成乙酰丙酸（LA）的催化剂。其中，[TMPDAPS][Br]2表现出最高的催化效率，以几丁质为起始原料时，LA产率达到65.3%。这些结果表明，以磺酸为基础的il，特别是[TMPDAPS][Br]2，为甲壳素和其他生物质高效水解成LA和相关化合物提供了有希望的新选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The influence of different anions in ionic liquids on the catalytic hydrolysis of chitin into levulinic acid

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The influence of different anions in ionic liquids on the catalytic hydrolysis of chitin into levulinic acid

A series of ionic liquids (ILs) based on N,N,N’,N’-tetramethyl-1,3-propandiyl diammonium bis(propanesulfonate) (TMPDAPS) were synthesized and characterized. The Hammett acidity (H₀) of these ILs was observed to vary depending on the anion, following the sequence: Cl⁻ < Br⁻ < TsO⁻ < CH₃SO₃⁻ < HSO₄⁻ < 1,5-NS⁻. The thermogravimetric analysis demonstrated that these ILs possess excellent thermal stability. Subsequently, these ILs were utilized as catalysts for the hydrolysis of chitin into levulinic acid (LA). Among these ILs, [TMPDAPS][Br]₂ exhibited the highest catalytic efficiency, achieving an impressive LA yield of 65.3 % when chitin was used as the starting material. These results suggest that sulphonic acid-based ILs, particularly [TMPDAPS][Br]₂, offer promising new options for the efficient hydrolysis of chitin and other biomass into LA and related compounds.

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.