Studies on the Thermo-Chemical Properties of Ionic Liquid Based on Alanine[C4mim][Ala]

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (6): 1210.

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Studies on the Thermo-Chemical Properties of Ionic Liquid Based on Alanine[C₄mim][Ala]

TONG Jing¹, SUN Ying-Chun², FANG Da-Wei¹, YANG Jia-Zhen¹*

1. Key Laboratory of Green Synthesis and Preparative Chemistry of Materials, Liaoning University, Shenyang 110036, China;
2. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China

Received:2008-08-25 Online:2009-06-10 Published:2009-06-10
Contact: YANG Jia-Zhen, E-mail: jzyanglnu@yahoo.com.cn
Supported by:
国家自然科学基金(批准号: 20773056)和辽宁省教育厅基金(批准号: 20063059, 20063060)资助.

Abstract

Abstract:

The enthalpies of solution of the ionic liquid(IL) based on alanine 1-butyl-3-methylimidazoliam alanine([C₄mim][Ala]), with various amount of water, Δ_solH_m(wc) was measured over a molality range of about 0.01—0.06 mol/kg by the solution-reaction isoperibol calorimeter at 298.15 K. According to Archer′s method, the standard molar enthalpies of solution of [C₄mim][Ala] with a known amounts of water, Δ_solH_m⁰(wc) were obtained. Plotting Δ_solH_m⁰(wc) against water content(w₂), was carried out, a good straight line was obtained and the intercept was the standard molar enthalpy of solution of [C₄mim][Ala] without water, Δ_sH_m⁰(pure IL)=Δ_sH_m⁰(pure IL)=-60.74 kJ/mol. Using an oxygen-bomb combustion calorimeter, the molar combustion enthalpy of [C₄mim][Ala] was determined at 298.15 K and the standard molar formation enthalpy of [C₄mim][Ala], Δ_fH_m⁰=(-675±11) kJ/mol, was obtained.

Key words: Alanine, Ionic liquid, Enthalpy of solution, Enthalpy of formation

TrendMD:

TONG Jing, SUN Ying-Chun, FANG Da-Wei, YANG Jia-Zhen*. Studies on the Thermo-Chemical Properties of Ionic Liquid Based on Alanine[C₄mim][Ala][J]. Chem. J. Chinese Universities, 2009, 30(6): 1210.

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Studies on the Thermo-Chemical Properties of Ionic Liquid Based on Alanine[C₄mim][Ala]

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