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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Raman spectroscopy of the mixtures (x)1-butyl-1-methylpyrrolidinium chloride-(1-x)TaCl5 in solid and molten states
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Raman spectroscopy of the mixtures (x)1-butyl-1-methylpyrrolidinium chloride-(1-x)TaCl5 in solid and molten states

机译：固态和熔融态（x）1-丁基-1-甲基吡咯烷鎓氯化物-（1-x）TaCl5混合物的拉曼光谱

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摘要

A series of novel ionic liquids consisting of 1-butyl-1-methylpyrrolidinium chloride (Pyr(14)Cl) and TaCl5 were obtained in a wide range of molar compositions for electrochemical application. Raman spectroscopy was used to investigate the complex formation of tantalum(V) in the mixtures of (x)Pyr(14)Cl-(1 - x)TaCl5 (x = 0.90-0.30) over the temperature range 20 - 160 degrees C. Depending on the molar composition, different species of tantalum (V) were identified. In the basic and neutral mixtures of (x)Pyr(14)Cl-(1 - x)TaCl5 (x = 0.80-0.50), tantalum(V) exists in the form of octahedral [TaCl6](-) in both solid and molten states. In acidic ionic liquids (x = 0.45-0.30), [Ta2Cl10] units are the main species of tantalum(V) identified in the solid state. As the temperature reose, the gradual degradation of [Ta2Cl10] units was observed in the solid state, accompanied by temperature rose, the g the formation of [TaCl6](-) and [Ta2Cl11](-) anions. In the molten state, in the range between 130 and 160 degrees C, the latter two species exist in equilibrium and are the dominant species of tantalum(V). The formation of oxochloride species of tantalum(V) was investigated in mixtures of Pyr(14)Cl-TaCl5-Na2O (x = 0.65) at various O/Ta mole ratios, and the formation of the oligomeric species with Ta-O-Ta bridging bonds was determined.
机译：在一系列用于电化学应用的摩尔组成中，获得了一系列由1-丁基-1-甲基吡咯烷氯化物（Pyr（14）Cl）和TaCl5组成的新型离子液体。拉曼光谱用于研究在20至160摄氏度的温度范围内（x）Pyr（14）Cl-（1-x）TaCl5（x = 0.90-0.30）的混合物中钽（V）的络合物形成。根据摩尔组成，鉴定出不同种类的钽（V）。在（x）Pyr（14）Cl-（1-x）TaCl5（x = 0.80-0.50）的碱性和中性混合物中，钽（V）以八面体[TaCl6]（-）的形式存在，固体和熔融态。在酸性离子液体（x = 0.45-0.30）中，[Ta2Cl10]单元是固态鉴定的主要钽（V）物种。随着温度的升高，在固态下观察到[Ta2Cl10]单元的逐渐降解，伴随着温度的升高，[TaCl6]（-）和[Ta2Cl11]（-）阴离子的形成。在130到160摄氏度之间的熔融状态下，后两种物质处于平衡状态，并且是钽（V）的主要物质。研究了Pyr（14）Cl-TaCl5-Na2O（x = 0.65）在各种O / Ta摩尔比下的混合物中钽（V）的氧氯化物物种的形成以及Ta-O-Ta的低聚物种的形成确定了桥接债券。

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