The chemiluminescent reactions Ba+N2O and BaH-O3 in solid argon

S. Randolph Long; Yuan-Pern Lee; Ole D. Krogh; George C. Pimentel

doi:10.1063/1.443645

The chemiluminescent reactions Ba+N₂O and BaH-O³ in solid argon

S. Randolph Long^*, Yuan-Pern Lee, Ole D. Krogh, George C. Pimentel

^*Corresponding author for this work

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Visible chemiluminescence in the spectral region 5500-7300 Å due to the Ba + N₂O and Ba + O₃ reactions is observed in argon matrices at temperatures below 15 K. Emission is recorded both as thermoluminescence and during deposition. Two molecular progressions of BaO, with ν₀₀ = 17 035 and 17 195 cm^-1, and ω″_e = 657 and 651 cm^-1, are found and are tentatively attributed to emission in the ā ³Σ ⁺ → X̃ ¹Σ⁺ transition for BaO* in different matrix sites, though the Ã ¹Σ ⁺ → X̃ ¹Σ⁺ transition could also be involved. The presumed excitation mechanism is the reactive population of one or both of the singlet states Ã ¹Σ⁺ and/or Ã′ ¹Π followed by rapid intersystem crossing to the ā ³Σ⁺ state. This is the first observation of a chemiluminescent atom transfer reaction in low temperature matrices. Emission due to Ba atoms in the (6s6p¹P)→(6s ² ¹S) transition is also observed, apparently excited by energy transfer from BaO*, most probably from the Ã′ ¹Π state.

Original language	English
Pages (from-to)	226-233
Number of pages	8
Journal	The Journal of Chemical Physics
Volume	77
Issue number	1
DOIs	https://doi.org/10.1063/1.443645
State	Published - Jul 1982

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title = "The chemiluminescent reactions Ba+N2O and BaH-O3 in solid argon",

abstract = "Visible chemiluminescence in the spectral region 5500-7300 {\AA} due to the Ba + N2O and Ba + O3 reactions is observed in argon matrices at temperatures below 15 K. Emission is recorded both as thermoluminescence and during deposition. Two molecular progressions of BaO, with ν00 = 17 035 and 17 195 cm-1, and ω″e = 657 and 651 cm-1, are found and are tentatively attributed to emission in the ā 3Σ + → {\~X} 1Σ+ transition for BaO* in different matrix sites, though the {\~A} 1Σ + → {\~X} 1Σ+ transition could also be involved. The presumed excitation mechanism is the reactive population of one or both of the singlet states {\~A} 1Σ+ and/or {\~A}′ 1Π followed by rapid intersystem crossing to the ā 3Σ+ state. This is the first observation of a chemiluminescent atom transfer reaction in low temperature matrices. Emission due to Ba atoms in the (6s6p1P)→(6s 2 1S) transition is also observed, apparently excited by energy transfer from BaO*, most probably from the {\~A}′ 1Π state.",

author = "Long, {S. Randolph} and Yuan-Pern Lee and Krogh, {Ole D.} and Pimentel, {George C.}",

year = "1982",

month = jul,

doi = "10.1063/1.443645",

language = "English",

volume = "77",

pages = "226--233",

journal = "The Journal of Chemical Physics",

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T1 - The chemiluminescent reactions Ba+N2O and BaH-O3 in solid argon

AU - Long, S. Randolph

AU - Lee, Yuan-Pern

AU - Krogh, Ole D.

AU - Pimentel, George C.

PY - 1982/7

Y1 - 1982/7

N2 - Visible chemiluminescence in the spectral region 5500-7300 Å due to the Ba + N2O and Ba + O3 reactions is observed in argon matrices at temperatures below 15 K. Emission is recorded both as thermoluminescence and during deposition. Two molecular progressions of BaO, with ν00 = 17 035 and 17 195 cm-1, and ω″e = 657 and 651 cm-1, are found and are tentatively attributed to emission in the ā 3Σ + → X̃ 1Σ+ transition for BaO* in different matrix sites, though the Ã 1Σ + → X̃ 1Σ+ transition could also be involved. The presumed excitation mechanism is the reactive population of one or both of the singlet states Ã 1Σ+ and/or Ã′ 1Π followed by rapid intersystem crossing to the ā 3Σ+ state. This is the first observation of a chemiluminescent atom transfer reaction in low temperature matrices. Emission due to Ba atoms in the (6s6p1P)→(6s 2 1S) transition is also observed, apparently excited by energy transfer from BaO*, most probably from the Ã′ 1Π state.

AB - Visible chemiluminescence in the spectral region 5500-7300 Å due to the Ba + N2O and Ba + O3 reactions is observed in argon matrices at temperatures below 15 K. Emission is recorded both as thermoluminescence and during deposition. Two molecular progressions of BaO, with ν00 = 17 035 and 17 195 cm-1, and ω″e = 657 and 651 cm-1, are found and are tentatively attributed to emission in the ā 3Σ + → X̃ 1Σ+ transition for BaO* in different matrix sites, though the Ã 1Σ + → X̃ 1Σ+ transition could also be involved. The presumed excitation mechanism is the reactive population of one or both of the singlet states Ã 1Σ+ and/or Ã′ 1Π followed by rapid intersystem crossing to the ā 3Σ+ state. This is the first observation of a chemiluminescent atom transfer reaction in low temperature matrices. Emission due to Ba atoms in the (6s6p1P)→(6s 2 1S) transition is also observed, apparently excited by energy transfer from BaO*, most probably from the Ã′ 1Π state.

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JO - The Journal of Chemical Physics

JF - The Journal of Chemical Physics

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The chemiluminescent reactions Ba+N₂O and BaH-O³ in solid argon

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