31P NMR study of the stoichiometry, stability and thermodynamics of new complexation between uranyl (II) nitrate and N- methyliminobis(methylenephosphonic acid) in two binary D_2O-DMSO- d_6 solvent mixtures

Irandoust M.; Daraei H.; Joshaghani M.; Gholivand K.; Gholivand M.B.

首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >31P NMR study of the stoichiometry, stability and thermodynamics of new complexation between uranyl (II) nitrate and N- methyliminobis(methylenephosphonic acid) in two binary D_2O-DMSO- d_6 solvent mixtures

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31P NMR study of the stoichiometry, stability and thermodynamics of new complexation between uranyl (II) nitrate and N- methyliminobis(methylenephosphonic acid) in two binary D_2O-DMSO- d_6 solvent mixtures

机译：31P NMR研究两种二元D_2O-DMSO- d_6混合溶剂中硝酸铀酰（II）与N-甲基亚氨基双（亚甲基膦酸）的新络合物的化学计量，稳定性和热力学

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The complexation reaction between uranyl (II) nitrate, and N-methyliminobis(methylenephosphonic acid) (MIDPH) was investigated in two different binary solvent mixtures of D_2O-DMSO-d_6 at various temperatures using ~(31)P NMR spectroscopy. The exchange between the free ligand and the 1:1 complexed ligand was slow on the NMR timescale and two ~(31)P NMR signals were observed. The formation constant of the resulting complex was evaluated from integration of the two ~(31)P NMR signals. The values of thermodynamic parameters of the resulting complex (ΔH, ΔS and ΔG) were determined from the temperature dependence of the formation constants. In the two solvent mixtures studied, the resulting complex is enthalpy stabilized but entropy destabilized.

机译：使用〜（31）P NMR光谱研究了D_2O-DMSO-d_6的两种不同二元溶剂混合物中硝酸铀酰（II）与N-甲基亚氨基双（亚甲基膦酸）（MIDPH）之间的络合反应。游离配体与1：1配体之间的交换在NMR时间尺度上很慢，并且观察到两个〜（31）P NMR信号。通过两个〜（31）P NMR信号的积分来评估所得络合物的形成常数。根据形成常数的温度依赖性确定所得复合物的热力学参数值（ΔH，ΔS和ΔG）。在研究的两种溶剂混合物中，生成的复合物具有焓稳定性，但熵不稳定。

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来源
《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2011年第2期|共5页
作者
Irandoust M.; Daraei H.; Joshaghani M.; Gholivand K.; Gholivand M.B.;
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正文语种 eng
中图分类无机化学;
关键词
31P NMR; Complexation; Formation constant; N-methyliminobis(methylenephosphonic acid); Thermodynamic; Uranyl;

机译：31P NMR;络合物;形成常数;N-甲基亚氨基双（亚甲基膦酸）;热力学;铀酰;

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1. 31P NMR study of the stoichiometry, stability and thermodynamics of new complexation between uranyl (II) nitrate and N- methyliminobis(methylenephosphonic acid) in two binary D_2O-DMSO- d_6 solvent mixtures [J] . Irandoust M., Daraei H., Joshaghani M., Polyhedron: The International Journal for Inorganic and Organometallic Chemistry . 2011,第2期

机译：31P NMR研究两种二元D_2O-DMSO- d_6混合溶剂中硝酸铀酰（II）与N-甲基亚氨基双（亚甲基膦酸）的新络合物的化学计量，稳定性和热力学
2. ~31P NMR Study of Complexation between Thallium(III)and Diethylenetriaminopentakis(methylenephosphonic Acid) [J] . I.A.Popova, K.I.Popov Russian Journal of Coordination Chemistry . 2004,第5期

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31P NMR study of the stoichiometry, stability and thermodynamics of new complexation between uranyl (II) nitrate and N- methyliminobis(methylenephosphonic acid) in two binary D_2O-DMSO- d_6 solvent mixtures

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