EPR study of alkali metal atoms in hydrocarbon matrices

✍ Scribed by Ruth Jones; J. Anthony Howard; Helen A. Joly; Peter P. Edwards; Richard J. Singer

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 594 KB
• Volume: 33
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260331316

✦ Synopsis

Abstract

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 Li~3~, Li~5~, Na~3~ and K~7~. Group 1 atoms in a solid cyclohexane matrix give only colloidal metal particles with an average diameter of less than 10^2^ Å.