Ultraviolet absorption spectra of cis and trans potassium peroxynitrite (KOONO) in solid argon

✍ Scribed by Wen-Jui Lo; Yuan-Pern Lee; Jyh-Hsin M. Tsai; Joseph S. Beckman

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 432 KB
• Volume: 242
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00702-6

✦ Synopsis

Two conformers (cis and trans) of potassium peroxynitrite (KOONO) were produced in an argon matrix containing potassium nitrate (KNO 3) at 13 K by means of in situ photolysis with an ArF excimer laser at 193 nm. Photoconversion among cis-and trans-KOONO, and KNO3, was achieved on irradiation of the matrix with a laser at varied wavelengths. With the aid of the relative intensities of IR absorption lines observed for each species at each stage of photolysis, the UV absorption spectra of cis-and trans-KOONO were determined. The absorption maxima, near 325 and 375 nm for cis-and trans-KOONO, respectively, agree with theoretical calculations by Krauss. The photolytic behavior of both conformers at varied wavelengths can be understood in relation to the observed UV absorptions.