Characteristic luminescence of the anilinium ion and the pKa values of excited singlet and triplet states

✍ Scribed by J.C. Joshi; D.D. Pant

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 365 KB
• Volume: 59
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(78)85034-9

✦ Synopsis

Contrary to earlier observations a characteristic Iuminescence due to the CBHsNHg ion was observed. The ion at 80 K, gives a fluorescence similar to that of benzene and a phosphorescence similar to that of aGEne_ The benzene type fluorescence changes to the aniline type on warming. It is suggested that an excited CgHsN& ion giving rise to the fluorescence becomes dissociated in the excited state. Computations for a change in the pKa values for excited singet and triplet states of C,HsNHz ion also susest there is a larger probability of losing the proton in the excited state.