Synthesis, Chirality and Complexation Phenomena of Two Diastereoisomeric Dinuclear Lanthanide(III) Complexes

Murray, B. S., Parker, D., dos Santos, C. M. G. and Peacock, R. D. (2010) Synthesis, Chirality and Complexation Phenomena of Two Diastereoisomeric Dinuclear Lanthanide(III) Complexes. European Journal of Inorganic Chemistry(18), pp. 2663-2672. (doi: 10.1002/ejic.201000243)

Abstract

Two 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-diaminoetbane derivative. Complexes of selected Ln(III) 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 H-1 NMR spectroscopic data compared with the mononuclear analogue.

• Item Type: Articles
• Keywords: ABSORPTION AMINO-ACIDS AQUEOUS-SOLUTION BINDING Chirality COMPLEXES DIAQUA-YTTERBIUM DYNAMICS Europium IONS Lanthanides Luminescence NMR RECOGNITION SYSTEMS
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Peacock, Dr Robert
• Authors: Murray, B. S., Parker, D., dos Santos, C. M. G., and Peacock, R. D.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: European Journal of Inorganic Chemistry
• ISSN: 1434-1948