Trapping chlorine radicals via substituting nitro radicals in the gas phase. Issue 1 (8th December 2015)

• Record Type: Journal Article
• Authors: Seto, Akira; Ochi, Yuki; Gotoh, Hiroaki; Sakakibara, Kazuhisa; Hatazawa, Shota; Seki, Kanekazu; Saito, Naoaki; Mishima, Yuji
• Is Part Of: Analytical methods. Volume 8:Issue 1(2016)
• Page Start: 25
• Page End: 28
• Publication Date: 2015-12-08
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c5ay01118c
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : Chlorine radicals (Cl˙), generated by the YAG laser photolysis ( λ = 355 nm) of Cl2 in the gas phase, were captured by using 2, 2-diphenyl-1-picrylhydrazyl (DPPH˙) and were characterized using ion attachment ionization-quadrupole mass spectrometry. Abstract : Although chlorine radicals are strong atmospheric oxidants, their direct spectroscopic detection in the environment (gas phase) using conventional analytical techniques has not been reported. Herein, chlorine radicals (Cl˙), generated by the YAG laser photolysis ( λ = 355 nm) of Cl2 in the gas phase, were captured by using 2, 2-diphenyl-1-picrylhydrazyl (DPPH˙). The product was identified as DPPH, wherein NO2 was substituted by Cl˙ at the ortho -carbon on the picryl aromatic ring, and was characterized using ion attachment ionization-quadrupole mass spectrometry. This reaction mechanism is a rare example of the detection and characterization of radical species, where radical spin densities on trapping reagents and frontier orbital interactions play important roles.