EPR study of alkali metal atoms in hydrocarbon matrices
EPR study of alkali metal atoms in hydrocarbon matrices
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烃基体中碱金属原子的 EPR 研究
DOI：
10.1002/mrc.1260331316
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发表时间：
1995
影响因子：
2
通讯作者：
R. Singer
中科院分区：
文献类型：
--
作者：
R. Jones;J. Howard;H. Joly;P. Edwards;R. Singer
在77 K下，使用旋转低温恒温器将第1族金属原子捕获在金刚烷和环己烷基质中。在金刚烷中获得了X-和Q-带频率的基质孤立原子的电子顺磁共振谱。根据Breit-Rabi方程的精确解计算磁性参数，并与气相和稀有气体基质中的值进行比较。EPR谱显示没有证据g和/或超精细各向异性。因此，没有证据表明这些原子的偶极态。此外，在导致形成Li 3、Li 5、Na 3和K7的实验条件下，Rb和Cs不形成三聚体、五聚体和/或七聚体。固体环己烷基质中的第1族原子仅产生平均直径小于102 μ m的胶体金属颗粒。
A rotating cryostat was used to trap the Group 1 metal atoms in adamantane and cyclohexane matrices at 77 K. Electron paramagnetic resonance spectra of matrix‐isolated atoms were obtained in adamantane at X‐ and Q‐band frequencies. The magnetic parameters were calculated from exact solutions of the Breit‐Rabi equation and compared with values in the gas phase and in rare gas matrices. The EPR spectra show no evidence for g and/or hyperfine anisotropy. Consequently, there is no evidence for the dipolar state of these atoms. Furthermore, trimers, pentamers and/or septamers are not formed from Rb and Cs under experimental conditions that have led to the formation of Li3, Li5, Na3 and K7. Group 1 atoms in a solid cyclohexane matrix give only colloidal metal particles with an average diameter of less than 102 Å.