Spectroscopy and reactive dynamics of atoms trapped in molecular hydrogen matrices

Fajardo, Mario E.; Tam, Simon; Thompson, Timmie L.; Cordonnier, Michelle E.

doi:10.1016/0301-0104(94)00232-0

“…35 Our improved comprehension of the spectroscopy of B atom doped cryogenic solids was made possible by experimental and theoretical results on the B-Ar, 36 ' 37 B-Ne, 38 and B-H 2 39 4 6 interaction potentials, and on B/Ar 4 7 4 9 and B/H 2 50 ' 5 1 clusters and solids. We note gratefully that these results have been obtained primarily by other HEDM Program participants.…”

Section: Introductionmentioning

confidence: 99%

Electronic spectroscopy of B atoms and B2 molecules isolated in para-H2, normal-D2, Ne, Ar, Kr, and Xe matrices

Tam

¹

,

Macler

²

,

DeRose

³

et al. 2000

The Journal of Chemical Physics

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information ABSTRACTWe report spectroscopic observations on B atoms isolated in cryogenic parahydrogen (pH 2 ), normal deuterium (nD 2 ), Ne, Ar, Kr, and Xe matrices, and of B 2 molecules in Ne, Ar, Kr, and Xe matrices. The 2s 2 3s( 2 S) *--2s 2 2p( 2 P) B atom Rydberg absorption suffers large gas-tomatrix blue shifts, increasing from +3000 to +7000 cm-1 in the host sequence: Xe < Kr < Ar t Ne z nD 2 t pH 2 . Much smaller shifts are observed for the 2s2p 2 ( 2 D) +-2s 2 2p( 2 P) B atom coreto-valence transition. We assign pairs-of absorption peaks spaced by • 10 nm in the 315 to 355,*4 -------)egion to the B 2 (A 3Z," < X 3 Zg-) Douglas-Herzberg transition. We assign a much weaker 1•q'i,# progression in the 260 to 300 nrm region to the B 2 (2) l' --X + Z transition. We report a nove progression of strong peaks in the 180 to 200 nm region which we suspect may be due to B 2 molecules, but which remains unassigned. Ultraviolet (UV) absorption spectra of B/pH 2 solids show two strong peaks at 216.6 and 208.9 nm, which we assign to the matrix perturbed 2s 2 3s( 2 S) +-2s22p( 2 P) and 2s2p 2 ( 2 D) <-2s 2 2p( 2 P) B atom absorptions, respectively. This assignment is

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“…35 Our improved comprehension of the spectroscopy of B atom doped cryogenic solids was made possible by experimental and theoretical results on the B-Ar, 36 '…”

Section: Introductionmentioning

confidence: 99%

Electronic Spectroscopy of B Atoms and B2 Molecules Isolated in Para-H2, Normal-D2, Ne, Ar, Kr, and Xe Matrices

Tam¹,

Macler²,

DeRose³

et al. 2000

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1

4

0

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information ABSTRACTWe report spectroscopic observations on B atoms isolated in cryogenic parahydrogen (pH 2 ), normal deuterium (nD 2 ), Ne, Ar, Kr, and Xe matrices, and of B 2 molecules in Ne, Ar, Kr, and Xe matrices. The 2s 2 3s( 2 S) *--2s 2 2p( 2 P) B atom Rydberg absorption suffers large gas-tomatrix blue shifts, increasing from +3000 to +7000 cm-1 in the host sequence: Xe < Kr < Ar t Ne z nD 2 t pH 2 . Much smaller shifts are observed for the 2s2p 2 ( 2 D) +-2s 2 2p( 2 P) B atom coreto-valence transition. We assign pairs-of absorption peaks spaced by • 10 nm in the 315 to 355,*4 -------)egion to the B 2 (A 3Z," < X 3 Zg-) Douglas-Herzberg transition. We assign a much weaker 1•q'i,# progression in the 260 to 300 nrm region to the B 2 (2) l' --X + Z transition. We report a nove progression of strong peaks in the 180 to 200 nm region which we suspect may be due to B 2 molecules, but which remains unassigned. Ultraviolet (UV) absorption spectra of B/pH 2 solids show two strong peaks at 216.6 and 208.9 nm, which we assign to the matrix perturbed 2s 2 3s( 2 S) +-2s22p( 2 P) and 2s2p 2 ( 2 D) <-2s 2 2p( 2 P) B atom absorptions, respectively. This assignment is

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“…A vibration at 1194.4 cm" 1 was assigned to the v 2 fundamental of cyclic, "effectively" symmetric BC 2 , on the basis of a complete set of measured isotopic shifts. In this paper we report findings on BC 3 and B 2 C 2 , which were observed in the same matrices where BC 2 was previously identified.…”

Section: Introductionmentioning

confidence: 59%

“…BC 3 and BC 2 were produced in the originally deposited matrix and gradually decreased during multiple annealings above 25 K. However, B 2 C 2 was formed only after annealing the condensate.…”

Section: Introductionmentioning

confidence: 99%

Vibrational Spectra of Linear BC3 and Linear B2C2 in Argon at 10K(a)

Presilla‐Márquez¹,

Carrick²,

Larson³

1998

0

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Spectroscopy and reactive dynamics of atoms trapped in molecular hydrogen matrices

Cited by 86 publications

References 121 publications

Electronic spectroscopy of B atoms and B2 molecules isolated in para-H2, normal-D2, Ne, Ar, Kr, and Xe matrices

Electronic spectroscopy of B atoms and B2 molecules isolated in para-H2, normal-D2, Ne, Ar, Kr, and Xe matrices

Electronic Spectroscopy of B Atoms and B2 Molecules Isolated in Para-H2, Normal-D2, Ne, Ar, Kr, and Xe Matrices

Vibrational Spectra of Linear BC3 and Linear B2C2 in Argon at 10K(a)

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