Abstract
AbstractTwo diastereoisomeric ditopic ligands have been synthesised by linking (SSS)‐heptadentate triamide derivative of cyclen with a central (SS)‐ or (SR)‐1,2‐diphenyl‐1,2‐diaminoethane derivative. Complexes of selected LnIII ions (Ln = Eu, Tb, Yb) have been characterized and circularly polarised luminescence spectra of the Eu systems revealed significant differences, consistent with a change in overall complex chirality associated with the local helicity at the metal centre. Stepwise binding constants for the formation of 1:1 and 2:1 ternary adducts with (S)‐lactate and (S)‐O‐phospho‐tyrosine have been determined by least‐squares analysis of spectral titration data, and emission and 1H NMR spectroscopic data compared with the mononuclear analogue.
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