High-field pulsed EPR and ENDOR of Gd3+ complexes in glassy solutions
High-field pulsed EPR and ENDOR of Gd3+ complexes in glassy solutions
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DOI：
10.1007/bf03166762
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发表时间：
2005-01-01
影响因子：
1
通讯作者：
Caravan, P
中科院分区：
文献类型：
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作者：
Raitsimring, AM;Astashkin, AV;Caravan, P
在这项工作中，D-波段脉冲电子顺磁共振记录场扫描光谱的几个Gd ~（3+）配合物在玻璃水-甲醇溶液。这些光谱进行了分析，通过一个专门开发的随机叠加模型，预测玻璃体系中的晶体场相互作用（CFI）参数的分布的基本特征。作为该分析的结果，评价了所研究的复合物的CFI分布。的D-波段米姆斯H-1电子核双共振光谱是免费的CFI相关的失真，这使我们能够准确地确定超精细相互作用（HFI）参数的水配体质子和明确地建立，HFI分布是唯一相关的Gd-H距离的分布。
In this work D-band pulsed electron paramagnetic resonance was used to record the field-sweep spectra of several Gd3+ complexes in glassy water-methanol solutions. These spectra were analyzed by a specially developed stochastic superposition model that predicted the essential features of the distribution of the crystal field interaction (CFI) parameters in glassy systems. As a result of this analysis, the CFI distributions for the studied complexes were evaluated. The D-band Mims H-1 electron-nuclear double resonance spectra were free from CFI-related distortions, which allowed us to accurately determine the hyperfine interaction (HFI) parameters for water ligand protons and to unequivocally establish that the HFI distribution is solely related to the distribution of the Gd-H distances.