Premium
NMR and Luminescence Binding Studies of Ytterbium, Thulium, and Europium Macrocyclic Complexes with Phosphorus(V) Oxy Anions
Author(s) -
Atkinson Paul,
Bretonnière Yann,
Parker David,
Muller Gilles
Publication year - 2005
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200590025
Subject(s) - chemistry , luminescence , europium , moiety , phosphonate , thulium , adduct , chelation , ytterbium , lanthanide , phosphate , stereochemistry , inorganic chemistry , crystallography , organic chemistry , ion , physics , optoelectronics , doping
The binding of a series of phosphate anions to coordinatively unsaturated macrocyclic complexes of Yb, Tm, and Eu was studied by 1 H‐NMR, emission and circularly polarized luminescence (CPL) spectroscopy. Each ternary adduct was distinguished by its spectral profile. With O ‐phosphorylated amino acids and peptides, chemoselective ligation of the phosphate moiety was favored by Eu over chelation involving the terminal amino group, which was competitive for Tm and Yb. A preference for binding O ‐phosphono‐ L ‐tyrosine sites was found with various Eu complexes, and was signalled by ratiometric changes in metal‐based emission and CPL spectra.