Experimental assessment of lanthanide ion donor preference: spectroscopic and theoretical dissection of static charge and dynamic polarisation contributions to axial ligation in a C-4-symmetric chiral europium complex

Bruce, James I.; Parker, David and Tozer, David J. (2001). Experimental assessment of lanthanide ion donor preference: spectroscopic and theoretical dissection of static charge and dynamic polarisation contributions to axial ligation in a C-4-symmetric chiral europium complex. Chemical Communications(21) pp. 2250–2251.

DOI: https://doi.org/10.1039/b105006k

Abstract

Measurements of the equilibrium constants for ligand exchange (MeCN, 295 K) involving the axial donor in a C4-symmetric, mono-capped, square antiprismatic cationic Eu complex, supported by calculations based on an electrostatic perturbation model, have been interpreted in terms of a predominant ligand polarisation interaction defined by observation of the hypersensitive J = 2 normalised emission intensity, in association with measurements correlating J = 1 band splitting and 1H NMR dipolar shifts that vindicate Bleaneys theory of magnetic anisotropy.

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