期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 -, 期 18, 页码 2663-2672出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201000243
关键词
Lanthanides; Europium; Luminescence; Chirality
资金
- Engineering, and Physical Sciences Research Council (EPSRC)
- Royal Society of Chemistry (RSC)
- ESF Cost Action 38
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.
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