Abstract The totally symmetric stretching mode $$\nu_{1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>ν</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math> Ln–(OH 2 ) of the first hydration shells of all the rare earth (RE) ions across the series from lanthanum to lutetium has been measured on dilute aqueous perchlorate solutions at room temperature. An S-shaped relationship has been found between the $$\nu_{1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>ν</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math> Ln–(OH 2 ) peak positions and the Ln–(OH 2 ) bond distances of the lanthanide(III) aqua ions. While the light rare earth ions form nona-hydrates, the heavy ones form octa-hydrates and the rare earth ions in the middle of the series show non integer hydration numbers between 9 and 8. A relationship between wavenumber positions $$\nu_{1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>ν</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math> Ln–(OH 2 ) and the Ln–(OH 2 ) bond distances of the RE hydrates has been given. Recent quantum mechanical calculations support the given interpretation.

Wolfram W. Rudolph

Gert Irmer

Journal of Solution Chemistry

溶液化学杂志为物理化学、化学物理、分子生物学、统计力学、生物化学和生物物理学等领域的液体溶液物理化学研究提供了一个论坛。重点是溶剂起主导作用而非偶然作用的论文。特色主题包括对液体溶液中电解质和非电解质的介电、光谱、热力学、传输或弛豫特性的实验研究。

The Journal of Solution Chemistry provides a forum for research in the physical chemistry of liquid solutions across various fields, including physical chemistry, chemical physics, molecular biology, statistical mechanics, biochemistry, and biophysics. The journal emphasizes papers where the solvent plays a dominant role rather than a coincidental one. Featured topics include experimental studies of dielectric, spectral, thermodynamic, transport, or relaxation properties of electrolytes and non-electrolytes in liquid solutions.

《Journal of Solution Chemistry》是一个专注于物理化学、化学物理、分子生物学、统计力学、生物化学和生物物理学等领域液体溶液物理化学研究的论坛。该期刊特别关注溶剂在研究中的主导作用，而非偶然作用。特色主题包括对液体溶液中电解质和非电解质的介电、光谱、热力学、传输或弛豫特性的实验研究。

Category	Quartile
化学	4
化学, 物理化学	4

On the Hydration of the Rare Earth Ions in Aqueous Solution

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Journal Info

Category	Quartile
CHEMISTRY, PHYSICAL	4