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Localizing Perturbations of the Racemic Equilibria Involving Dipicolinate‐Derived Lanthanide(III) Complexes
Author(s) -
Nguyen Brian T.,
Ingram Andrew J.,
Muller Gilles
Publication year - 2016
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.22584
Subject(s) - chemistry , lanthanide , europium , terbium , hydrogen bond , molecule , aqueous solution , pyridine , luminescence , coordination sphere , crystallography , stereochemistry , organic chemistry , ion , physics , optoelectronics
Helical D 3 tris (4‐amino‐2,6‐pyridine‐dicarboxylate)terbium(III) and europium(III) complexes, which form a racemic equilibrium in aqueous solution, were prepared to study their secondary coordination sphere interactions with chiral amino acids . These interactions were probed using a combination of circularly polarized luminescence (CPL) and 13 C NMR spectroscopy. The results indicate that, regardless of the interaction between the chiral molecule and the complex, without an accessible hydrogen‐bond donor on the associating molecule, perturbation of the racemic equilibrium cannot occur. A generalized conclusion is established that indicates that the mechanism of chiral recognition by tris (dipicolinate)lanthanide(III) complexes is similar across a variety of analogous ligands. Chirality 28:325–331, 2016 . © 2016 Wiley Periodicals, Inc.