电子旋转和旋转轨道合对单核过渡金属复合体中脱凝的影响
Michael J Graham1, Joseph M Zadrozny, Muhandis Shiddiq
1Department of Chemistry, Northwestern University , Evanston, Illinois 60208-3113, United States.
Journal of the American Chemical Society
|May 20, 2014
概括
研究人员合成了超磁性协调复合体,以最大限度地减少量子信息处理的电子自转脱凝. 一个复合体,[Ru(C2O4) 3) ((3-),表现出很长的连贯时间和拉比振荡,使其成为一个可行的分子量子位候选者.
科学领域:
- 量子信息处理 量子信息处理
- 分子磁力学分子磁力学
- 协调化学 协调化学
背景情况:
- 尽量减少电子自旋脱凝对于开发量子信息处理的分子候选人至关重要.
- 偏磁协调复合体为探索量子现象提供了一个有前途的平台.
研究的目的:
- 系统地研究偏磁协调复合体中的脱凝.
- 确定具有较长连贯时间的分子量子比特的设计原则.
- 为了评估旋转大小和旋转轨道合对脱凝的影响.
主要方法:
- 合成了两系列的偏磁性协调复合体:[M(C2O4)3](3-) 和[M(CN)6](3-).
- 脉冲电子磁共振 (EPR) 光谱,包括哈恩回声实验,以测量连贯时间 (T2).
- 旋转状态 (S) 和旋转轨道合 (ζ) 的表征.
主要成果:
- 一致时间 (T2) 显示出对旋转大小和旋转轨道合的最小依赖.
- 复合体[Ru(C2O4)3)(3-) 呈现出较长的连贯时间 (T2 = 3.4 μs).
- 在[Ru(C2O4)3](3-中观察到拉比振荡,这是分子量子位的罕见特征.
结论:
- 旋转大小和旋转轨道合并不是这些复合体中限制电子旋转脱凝的主要因素.
- [Ru(C2O4)3](3-) 是一个可行的分子量子位候选者,因为它具有很长的连贯时间和观察到的拉比振荡.
- 协调复合体代表了开发分子量子比特的一个有前途的平台,允许多种类型的偏磁离子和自旋状态的选择,同时保持连贯性.
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