顺磁核磁共振波谱数据显示溶剂性质对六丁基硫醚苯基硼酸钴(II)溶液自旋平衡的影响

IF 1.1 3区 化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR
D. Yu. Aleshin, V. V. Zlobina, A. S. Belov, Ya. Z. Voloshin, A. A. Pavlov
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引用次数: 0

摘要

摘要 通过顺磁核磁共振光谱研究了钴(II)苯硼酸六正丁基硫醚笼络合物在溶液中的自旋态。结果表明,在不同性质的溶剂(乙腈、氯仿、二氯甲烷和苯)中,这种笼状配合物会发生温度诱导的自旋转变。利用以前开发的分析核磁共振光谱中顺磁性偏移的方法,可以确定溶液中自旋平衡的热力学参数(焓和熵)。尽管大双环三(二恶英)分子具有构象刚性,但根据所用溶剂的极性,电子结构和自旋平衡参数会发生重大变化。这为通过改变介质的这一参数来微调自旋开关特性提供了机会。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of the Solvent Nature on the Spin Equilibrium in Solutions of the Cobalt(II) Phenylborate Hexa-n-Butylsulfide Clathrochelate by the Paramagnetic NMR Spectroscopy Data

Influence of the Solvent Nature on the Spin Equilibrium in Solutions of the Cobalt(II) Phenylborate Hexa-n-Butylsulfide Clathrochelate by the Paramagnetic NMR Spectroscopy Data

Influence of the Solvent Nature on the Spin Equilibrium in Solutions of the Cobalt(II) Phenylborate Hexa-n-Butylsulfide Clathrochelate by the Paramagnetic NMR Spectroscopy Data

The spin state of the cobalt(II) phenylborate hexa-n-butylsulfide clathrochelate in solutions is studied by paramagnetic NMR spectroscopy. This cage complex is shown to undergo the temperature-induced spin transition in solvents of different nature (acetonitrile, chloroform, dichloromethane, and benzene). The previously developed method for an analysis of paramagnetic shifts in NMR spectra allows the determination of the thermodynamic parameters (enthalpy and entropy) of the spin equilibrium in the solutions. In spite of the conformational rigidity of the macrobicyclic tris(dioximate) molecules, substantial changes in the electronic structures and spin equilibrium parameters are observed depending on the polarity of the solvent used. This provides opportunities for fine tuning of spin switch characteristics by changing this parameter of the medium.

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来源期刊
Russian Journal of Coordination Chemistry
Russian Journal of Coordination Chemistry 化学-无机化学与核化学
CiteScore
2.40
自引率
15.80%
发文量
85
审稿时长
7.2 months
期刊介绍: Russian Journal of Coordination Chemistry is a journal that publishes reviews, original papers, and short communications on all aspects of theoretical and experimental coordination chemistry. Modern coordination chemistry is an interdisciplinary science that makes a bridge between inorganic, organic, physical, analytical, and biological chemistry.
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