Infrared Spectrum of Matrix-Isolated (NO)2

Abstract

Matrix-isolated (NO)2 has been obtained by rapid deposition of NO–N2 mixtures on an optical window at 15°K, by limited diffusion of matrix-isolated NO at low temperatures, and by photochemical production of O atoms in an N2O environment. Controlled low-temperature studies allowing limited molecular diffusion indicate spectral growth patterns due to three different species. Experiments carried out with 15NO and N18O isotopic samples along with the photochemical production of (NO)2 suggests that cis and trans O=N=N=O and possibly another unstable cis form are produced.

Ultraviolet-laser induced desorption of NO from the Cr2O3(0001) surface: Involvement of a precursor state?

“…The coupling of the unpaired 2* electrons give a singulett ( 1 A 1 ) ground state which explains why the trans conformation is much less stable. 49 There are a number of examples for which this structure is sustained in solids, 50 matrixes, 51 and on surfaces. 34,35,52 The N-N-O bond angles are 101.3°i n solid NO.…”

Imaging Covalent Bonding between Two NO Molecules on Cu(110)

“…The direct interaction via the overlap of the molecular orbital is of particular interest with relevance to the associative combination and reaction between adsorbates. Nitric oxide (NO) has an unpaired electron in its 2 Ã orbital, and this could give rise to a covalent interaction between two NO molecules on the surface to form a dimer as in a gas phase [1] and in a matrix [2]. Upon adsorption on metal surfaces, however, the 2 Ã orbital of NO is usually hybridized with surface electronic states [3][4][5] so that the unpaired electron is delocalized in the metal, resulting in the loss of the paramagnetism [6].…”

The NO Dimer: Jet-Cooled Study of ν1and ν5Transitions

“…This phenomenon can be evoked in particular in the case of the 5 vibration due to the relatively high total pressure required to record a dimer absorption which could be unambiguously detected and discriminated from the noise. As an example, pressures up to 80 mbar were actually used in our previous study of the 5 …”

“…Only two spectroscopic studies were previously based, partly or totally, upon jet-cooled spectra (23,24). In reference (24) a first evaluation of the 5 predissociation time was given (20 -40 ps).…”