Molecular design of crown ethers. 13. Complexation thermodynamics of light lanthanoid nitrates with aza-16-crown-5 lariat in acetonitrile: Enhanced selectivity for Nd{sup 3+}

Journal Article · Thu Oct 24 04:00:00 EDT 1996 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/jp961782e· OSTI ID:420730

Liu, Y; Han, B H; Li, Y M; Chen, R T ^[1]; Ouchi, Mikio ^[2]; Inoue, Yoshihisa ^[3]

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1. Nankai Univ., Tianjin (China)
2. Himeji Inst. of Technology, Hyogo (Japan)
3. Osaka Univ., Suita (Japan)

In the present study, we synthesized nitrogen-pivot 16-crown-5 lariat (1) and investigated the thermodynamics of the complexation with aza-16-crown-5 lariat in acetonitrile of light lanthanoid(III) nitrates (Ln = La, Ce, Pr, Nd, Sm, Eu, and Gd), using titration calorimetry. The thermodynamic parameters for the complexation of light lanthanoid nitrates with aza-16-crown-5 lariat, together with those for 16-crown-5 (3) and the lariat ether (2), will serve our further understanding of this thermodynamically less investigated area of crown ether chemistry. It is another point of interest to examine the scope and limitations of the lariat effect with the relatively flexible N-pivot lariat ether from the thermodynamic point of view. 33 refs., 2 figs., 1 tab.

• OSTI ID: 420730
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 43 Vol. 100; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ACETONITRILE
CATIONS
CROWN ETHERS
DESIGN
MOLECULAR STRUCTURE
NEODYMIUM
NITRATES
NUMERICAL DATA
STABILITY
STOICHIOMETRY
SYNTHESIS
THERMODYNAMIC PROPERTIES