Muller Françoise C, Muller Gilles, Riehl James P
Department of Chemistry, San José State University, San José, California.
Chirality. 2007 Nov;19(10):826-32. doi: 10.1002/chir.20476.
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.
本文介绍了用左旋和右旋圆偏振光激发外消旋三齿铕（III）与2,6-吡啶二甲酸形成的配合物，并添加（+）-酒石酸二甲酯进行扰动，以及铕（III）与（R,R）-N,N'-双（1-苯乙基）-2,6-吡啶二甲酰胺形成的三手性配合物后，发光强度差异的测量。用于这些测量的实验技术在设计上与荧光检测圆二色光谱相同，但由于铕（III）激发态寿命长，需要专门的仪器，因此在本手稿中称为发射检测圆二色性（EDCD）。这些测量需要对入射圆偏振进行相对缓慢的调制，这是通过液晶偏振器实现的。将结果与传统的圆二色性测量进行了比较，并介绍了EDCD的其他特性和潜在应用。
