Emission detected circular dichroism from long-lived excited states: application to chiral Eu(III) systems.
Emission detected circular dichroism from long-lived excited states: application to chiral Eu(III) systems.
复制标题
发射检测到长寿命激发态的圆二色性：在手性 Eu(III) 系统中的应用。
作者：
Muller,FrançoiseC;Muller,Gilles;Riehl,JamesP
介绍了通过添加 (+)-酒石酸二甲酯扰动的外消旋三齿 Eu(III) 与 2,6-吡啶二羧酸配合物以及 Eu(III) 与 (R,R)-N,N'-双(1-苯乙基)-2,6-吡啶-二甲酰胺的三手性配合物在左右圆偏振光激发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，但在本手稿中被称为发射检测圆二色性（EDCD），因为Eu（III）激发态的寿命较长，需要专门的仪器。这些测量需要相对较慢的入射圆偏振调制，这是通过液晶偏振器完成的。将结果与传统 CD 测量进行比较，并介绍 EDCD 的其他特性和潜在应用。手性，2007 年。© 2007 Wiley-Liss, Inc.
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.