利用雷射誘發螢光法研究1-C10H9在仲氫間質之光光譜

Abstract

Protonated naphthalene (C10H9+) and its neutral counterparts (hydronaphthyl radicals, C10H9) are important intermediates in the reactions of aromatic compounds and in understanding the unidentified infrared (UIR) emission and the diffuse interstellar bands (DIBs) from interstellar media. To follow up this hypothesis, their infrared and electronic spectra are needed. Here, we performed a new system that can record IR absorption and the laser-induced fluorescence spectra of 1-C10H9 radical in solid para-hydrogen (p-H2). 1-C10H9 radicals were produced upon electron bombardment of a mixture of naphthalene (C10H8) and p-H2 during matrix deposition. The dispersed fluorescence and excitation spectra of 1-C10H9 were recorded and assigned. The assignments are according to the theoretical calculations with the TD-B3LYP/6-311++G(2d,2p) method. The results are compared with previous reports on 1-C10H9 in the gaseous phase and in a Ne matrix.

Protonated naphthalene (C10H9+) and its neutral counterparts (hydronaphthyl radicals, C10H9) are important intermediates in the reactions of aromatic compounds and in understanding the unidentified infrared (UIR) emission and the diffuse interstellar bands (DIBs) from interstellar media. To follow up this hypothesis, their infrared and electronic spectra are needed. Here, we performed a new system that can record IR absorption and the laser-induced fluorescence spectra of 1-C10H9 radical in solid para-hydrogen (p-H2). 1-C10H9 radicals were produced upon electron bombardment of a mixture of naphthalene (C10H8) and p-H2 during matrix deposition. The dispersed fluorescence and excitation spectra of 1-C10H9 were recorded and assigned. The assignments are according to the theoretical calculations with the TD-B3LYP/6-311++G(2d,2p) method. The results are compared with previous reports on 1-C10H9 in the gaseous phase and in a Ne matrix.