ESR in the triplet states of isoquinoline, isoquinolinium, 1-naphthol and 1-naphtholate with parallel polarization. Observation of the proton hyperfine structure of ΔMS=±2 transitions in glassy matrices

✍ Scribed by Akira Muramoto; Kenshiro Uchida; Mikio Yagi; Jiro Higuchi

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 260 KB
• Volume: 150
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(88)80051-4

✦ Synopsis

By applying a microwave magnetic field parallel to an external magnetic field, the ESR spectra of isoquinoline, isoquinolinium, I-naphthol and I-naphtholate in their phosphorescent triplet states have been observed in ethanol at 77 K. The proton hyperfine structure in A.W5= f2 transitions has been observed in random rigid solutions. In all molecular species studied the a-proton hypertine splittings of the ionic forms are smaller than those of the corresponding neutrals.