Electronic and Vibrational Absorption Spectra of NH2 in Solid Ne

Sheng-Lung Chou; Jen-Iu Lo; Yu-Chain Peng; Hsiao-Chi Lu; Bing-Ming Cheng

doi:10.1021/acsomega.8b03344

Electronic and Vibrational Absorption Spectra of NH₂ in Solid Ne

ACS Omega. 2019 Jan 29;4(1):2268-2274. doi: 10.1021/acsomega.8b03344. eCollection 2019 Jan 31.

Authors

Sheng-Lung Chou¹, Jen-Iu Lo¹, Yu-Chain Peng¹, Hsiao-Chi Lu¹, Bing-Ming Cheng¹

Affiliation

¹ National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan.

Abstract

Irradiation of ammonia dispersed in solid neon near 4 K with tunable far-ultraviolet light from a synchrotron yielded amidogen, NH₂, and imidogen, NH, radicals as products. The electronic absorption spectra of amidogen radicals in isotopic variants NH₂, NHD, and ND₂ were recorded in the visible and near-ultraviolet regions after photolysis of NH₃ and ND₃. The infrared absorption lines of NH₂ associated with vibration-rotational levels of vibrational modes ν₁ at 3234.3 (0_0,0-1_0,1), 3244.9 (0_0,0-1_1,1), and 3249.3 cm^-1 (0_0,0-1_1,0), and ν₂ at 1498.7 (1_0,1-1_1,1), 1509.5 (1_1,0-1_0,1), 1516.5 (0_0,0-1_0,1), 1528.6 (0_0,0-1_1,1), and 1533.7 cm^-1 (0_0,0-1_1,0) were unambiguously identified according to the results of experiments with deuterium isotopes. The 0_0,0-0_0,0 lines of ν₁ and ν₂ for NH₂ were derived to be at 3213.5 and 1494.6 cm^-1 in solid neon.