Electronic Spectroscopy of Rhodium Mononitride

Author： Fougère S.G. Balfour W.J. Cao J. Qian C.X.W.

ISSN： 0022-2852

Source： Journal of Molecular Spectroscopy, Vol.199, Iss.1, 2000-01, pp. : 18-25

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Abstract

We report the first observation of gas-phase electronic spectra for rhodium mononitride. The RhN molecules have been produced in the reaction of laser-ablated rhodium metal with ammonia. Many vibronic bands have been studied in the 400–700 nm region using laser-induced fluorescence. Rotational analyses of the stronger of these, together with excited state lifetime measurements and Rh¹⁴N–Rh¹⁵N isotopic shifts, identify three electronic systems in the region: [15.1]1–X¹Σ⁺, [19.5]0⁺–X¹Σ⁺, and [22.4]0⁺–X¹Σ⁺ with (0, 0) bands near 15 071, 19 489, and 22 385 cm^-1, respectively. The ¹Σ⁺ symmetry for the ground state agrees with theoretical predictions. Dispersed fluorescence spectra have been recorded which reveal the presence of electronic states at T = 553, 1740, and 3920 cm^-1.