Circularly polarized luminescence and enantiomeric energy transfer discrimination of chiral Tb(III)-Nd(III) EDDS and related complexes
Circularly polarized luminescence and enantiomeric energy transfer discrimination of chiral Tb(III)-Nd(III) EDDS and related complexes
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DOI：
10.1016/j.jallcom.2004.03.091
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发表时间：
2004-10-20
影响因子：
6.2
通讯作者：
Herren, M
中科院分区：
文献类型：
--
作者：
Morita, M;Rau, D;Herren, M
在溶液中测量了光学活性Tb（III）-L，D-EDDS配合物的总发光（TL），圆偏振发光（CPL），发光不对称因子g（lum）和寿命，以研究在猝灭剂Nd（III）-L，D-EDDS或（+），（-）-[Co（en）（3）]I-3存在下能量转移过程的对映体区分。手性配合物对的光谱差异进行了讨论的Stern-Volmer发光猝灭机制。猝灭速率常数证明了同手性对在激发态的能量比异手性对低。讨论了Tb（Ⅲ）-L，D-EDDS和Tb（Ⅲ）-（R），（S）-环戊二烯衍生物配合物纳米晶在干凝胶中10 K下的TL和CPL光谱图及高分辨精细结构。在300 ~ 10 K温度范围内，在三方二面体Tb（ODA）（3）单晶的轴向CPL/TL谱中发现了晶场分裂和结构异常。(C)2004 Elsevier B. V.保留所有权利。
Total luminescence (TL), circularly polarized luminescence (CPL), luminescence dissymmetry factor g(lum) and lifetimes of optical active Tb(III)-L,D-EDDS complexes are measured in solution in order to investigate enantiomeric discrimination of energy transfer processes in the presence of quenchers: Nd(III)-L,D-EDDS or (+),(-)-[Co(en)(3)]I-3 complexes. The spectroscopic differences for the chiral complex pairs are discussed in terms of the Stern-Volmer luminescence quenching mechanism. The quenching rate constants give evidence of the fact that a homochiral-pair is lower in energy in the excited states than a heterochiral-pair. The TL and CPL spectral patterns and fine structures in high resolutions are discussed at 10K of Tb(III)-L,D-EDDS and Tb(III)-(R),(S)-cyclene derivative complex nanocrystals in xerogel. The crystal field splitting and the structural anomaly are found in the axial CPL/TL spectra of trigonal dihedral Tb(ODA)(3) single crystals in the temperature range between 300 and 10 K. (C) 2004 Elsevier B.V. All rights reserved.