Studies on Thermodynamics of the Dissociation of Amino Acid in Mixed Solvents ( Ⅰ ) —Glycine-1,2-Propanediol-Water System at278.15-318. 15 K

Abstract

Abstract: The two thermodynamic dissociation constants of glycine at 5 different temperatures from 278.15 to 318.15 Kin 0.05 mole fraction 1,2-propanediol-water mixed solvent were determined from precise EMFmeasurements hydrogen-silver chloride electrondes in cells without liguid junction by using the polynomial approach proposed in this paper on the basis of Pitzer's electrolytic solution theory. As compared with traditional extrapolation on the basis of extended Debye-Huckel equation, the results obtained from both methods are in agreement with each other. The change of the first or second dissociation constants is given as a function of the thermodynamic temperature Tby empirical pK = A¹/(T+A²+A₃T). The thermodynamic quantities of dissociation in the mixed solvent are calculated and the results are discussed.

Key words: Pitzer equation, Glycine, Dossociation constant, Mixed solvent, Electromotive force

TrendMD:

Yang Jiazhen, Zhang Litian, Men Dianyuan, Liang Chunyu, He Limin, Sun Ailian . Studies on Thermodynamics of the Dissociation of Amino Acid in Mixed Solvents ( Ⅰ ) —Glycine^-1,2-Propanediol-Water System at_278.15-318. 15 K[J]. Chem. J. Chinese Universities, 1990, 11(2): 180.

[1]	ZHOU Xinhui, WANG Haishui. Co-effect of L-Cysteine Self-assembled Monolayers and Mixed Solvents on Chiral Separation of DL-glutamic Acid^† [J]. Chem. J. Chinese Universities, 2017, 38(6): 1076.
[2]	YUAN Liming, SU Yingqiu, DUAN Aihong, ZHENG Ying, AI Ping, CHEN Xuexian. Optical Resolution of D,L-Phenylglycine and Chiral Separation Mechanism Using an Enantioselective Membrane of Vancomycin^† [J]. Chem. J. Chinese Universities, 2016, 37(11): 1960.
[3]	SONG Xiudao, HE Jun, MA Jin, LIU Yunmei, ZHENG Xing, LEI Xiaoyong, GUO Yu. Syntheses and Anticancer Activities of Glycine Derivatives of Chrysin^† [J]. Chem. J. Chinese Universities, 2014, 35(7): 1465.
[4]	LIU Feng-Jun, ZHANG Bing-Bo, SONG Ge, CHENG Ying-Sheng. Gd³⁺ and RGD Functionalized Quantum Dots for Fluorescent and MR Dual-modality Imaging of Pancreatic Cancer Cells [J]. Chem. J. Chinese Universities, 2012, 33(02): 378.
[5]	TONG Shu-Yuan, XU Lin, SHI Tong-Fei*, AN Li-Jia. Mixed Solvent Induced Dewetting of Polystyrene Thin Film [J]. Chem. J. Chinese Universities, 2011, 32(4): 995.
[6]	LI Zhen-Quan, WANG Zeng-Lin, ZHANG Lei, XU Zhi-Cheng, ZHANG Lu*, ZHAO Sui. Effects of Cationic and Zwitterionic Surfactants on Wetting of Quartz Surfaces [J]. Chem. J. Chinese Universities, 2011, 32(10): 2376.
[7]	ZHANG Xin-Kuan, ZHUO Ke-Lei*, MA Jing-Jing, LIU Hong-Xun, WANG Jian-Ji. Activity Coefficients of CaCl₂ in Glycine+Water and Alanine+Water Mixtures at 298.15 K [J]. Chem. J. Chinese Universities, 2009, 30(9): 1844.
[8]	LOU Wen-Yong*, ZONG Min-Hua. Correlation Between Catalytic Characteristics of Papain and Components and Solvent Properties of Ionic Liquids [J]. Chem. J. Chinese Universities, 2007, 28(7): 1283.
[9]	LI Fei, CAO Xue-Jing, ZHANG Heng-Bin*, ZHANG Yu-Min, LI Ke-Chang. Electrooxidation of 2-Picoline in Different Organic Compound/Water Mixed Solvents [J]. Chem. J. Chinese Universities, 2007, 28(4): 704.
[10]	MA Lin, LIN Rui-Sen, LIN Gui-Mei, XUNan. Transfer Enthalpies of Glycine from Water to Aqueous Organic Solutions [J]. Chem. J. Chinese Universities, 2005, 26(11): 2128.
[11]	HAN Zheng-Bo, AN Hai-Yan, WANG Li, LUAN Guo-You, WANG En-Bo, HAN Zheng-Xue. Synthesis and Crystal Structure of Organic-inorganic Hybrid:{[Na₂(H₂O)₄]₂[γ-Mo₈O₂₆(Gly-Gly)₂]}·4H₂O [J]. Chem. J. Chinese Universities, 2003, 24(9): 1558.
[12]	DENG Yong-Hong, TUO Xin-Lin, CHENG Hao, WANG Xiao-Gong . Synthesis and H-aggregation of a Novel Polyelectrolyte Bearing Branched Azo Side Chains [J]. Chem. J. Chinese Universities, 2003, 24(7): 1320.
[13]	GU Yan-Juan, ZHOU Zhi-You, CHEN Sheng-Pei, ZHEN Chun-Hua, SUN Shi-Gang . An EQCM Study of Adsorption and Oxidation of Glycine at a Pt Electrode in Acid and Alkaline Solutions [J]. Chem. J. Chinese Universities, 2003, 24(3): 501.
[14]	GAO Sheng-Li, FANG Yan, HU Rong-Zu, CHEN San-Ping, SHI Qi-Zhen . Crystallization Kinetics of Zn(Val)SO₄·H₂O in Mixed Solvent of Water with Acetone [J]. Chem. J. Chinese Universities, 2003, 24(3): 381.
[15]	XU Qing, HUANG Duan-Ping, CHEN Wen, WANG Hao, YUAN Run-Zhang . GNP Synthesis and Electrical Conduction Properties of La_0.6Sr_0.4Co_1-yFe_yO₃Perovskite-type Oxides [J]. Chem. J. Chinese Universities, 2003, 24(12): 2271.

Studies on Thermodynamics of the Dissociation of Amino Acid in Mixed Solvents ( Ⅰ ) —Glycine^-1,2-Propanediol-Water System at_278.15-318. 15 K

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments