DOI: 10.1063/1.1675624. ESR and Optical Spectroscopy of the AlO Molecule at 4°K; Observation of an Al Complex and Its Interaction with Krypton

ESR and Optical Spectroscopy of the AlO Molecule at 4°K; Observation of an Al Complex and Its Interaction with Krypton

10.1063/1.1675624

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The AlO molecule in its 2Σ ground state has been trapped in neon, argon, and krypton matrices at 4°K, and its ESR and optical spectra (infrared, visible, and uv) measured. In neon its magnetic parameters are g‖ = 2.0015(3), g ⊥ = 2.0004(3), A‖( 27Al) = 872(1) MHz, and A ⊥ ( 27Al) = 713(1) MHz. Δg⊥ is in accord with the magnitude and sign of the spin-doubling constant, γ0, determined in the gas phase. An infrared band at 924 cm−1 in neon (917 cm−1 in argon) is assigned to AlO: the large shift from the gas value of 965 cm−1 indicates a highly ionic molecule. Besides the strong B 2Σ←X 2Σ absorption bands near 4500 Å, a progression of weak bands have been observed between 5500 and 11 000 cm−1 and assigned to the A 2πi←X 2Σ transition of AlO. ESR spectra of a weakly bonded Al–X molecule (where X may be Al2O) are observed in concentrated matrices; its magnetic properties are found to be very dependent upon the matrix gas used. In krypton matrices, 83Kr hfs is also observed but disappears (reversibly) above about 35°K, suggesting the formation of a metastable Kr–AlX complex.

Bibliography

Knight, L. B., & Weltner, W. (1971). ESR and Optical Spectroscopy of the AlO Molecule at 4Â°K; Observation of an Al Complex and Its Interaction with Krypton. The Journal of Chemical Physics, 55(10), 5066â5077.

Authors 2

L. B. Knight (first)
W. Weltner (additional)

References 36 Referenced 73

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Dates

Type	When
Created	21 years, 6 months ago (Feb. 4, 2004, 5:07 p.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 5:20 p.m.)
Indexed	2 months, 4 weeks ago (May 27, 2025, 10:59 a.m.)
Issued	53 years, 9 months ago (Nov. 15, 1971)
Published	53 years, 9 months ago (Nov. 15, 1971)
Published Print	53 years, 9 months ago (Nov. 15, 1971)

Funders 0

None

BibTeX

@article{Knight_1971, title={ESR and Optical Spectroscopy of the AlO Molecule at 4°K; Observation of an Al Complex and Its Interaction with Krypton}, volume={55}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1675624}, DOI={10.1063/1.1675624}, number={10}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Knight, L. B. and Weltner, W.}, year={1971}, month=nov, pages={5066–5077} }

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