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Emission detected circular dichroism from long‐lived excited states: Application to chiral Eu(III) systems
Author(s) -
Muller Françoise C.,
Muller Gilles,
Riehl James P.
Publication year - 2007
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.20476
Subject(s) - circular dichroism , chemistry , luminescence , excited state , polarizer , circular polarization , chirality (physics) , fluorescence , pyridine , crystallography , linear dichroism , photochemistry , birefringence , atomic physics , optics , organic chemistry , symmetry breaking , physics , chiral symmetry breaking , quantum mechanics , nambu–jona lasinio model , microstrip
Abstract The measurement of the difference in intensity of luminescence following excitation with left and right circularly polarized light for racemic terdentate Eu(III) complexes with 2,6‐pyridine dicarboxylic acids perturbed by the addition of (+)‐dimethyltartrate and for tris chiral complexes of Eu(III) with ( R , R )‐ N , N ′‐bis(1‐phenylethyl)‐2,6‐pyridine‐dicarboxamide are presented. The experimental technique used for these measurements is identical in design to fluorescence detected circular dichroism spectroscopy, but is referred to in this manuscript as emission detected circular dichroism (EDCD) because of the long lifetime of the Eu(III) excited state requiring specialized instrumentation. These measurements required relatively slow modulation of the incident circular polarization, which was accomplished with a liquid crystal polarizer. The results are compared with conventional CD measurements, and additional characteristics and potential applications of EDCD are presented. Chirality, 2007. © 2007 Wiley‐Liss, Inc.