Spectroscopy of Matrix Isolated Species

Almond, Matthew J.; Downs, Anthony J.; Clark, Ronald J.; Hester, R. E.; Lewis, Rh.

doi:10.1016/0924-2031(90)80017-x

Cited by 14 publications

(6 citation statements)

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“…[16][17][18] EET processes are observed in the gas phase, 9,19 in the fluidphase, 6 in molecular crystals, 20 in liquid crystals, 21 and more recently, in low-temperature matrices. [22][23][24] These processes involve electronic (E), vibrational (V), and rotational (R) EET, namely, E f E, E f V, V f E, and V f R. To the best of our knowledge there has been no systematic spectroscopic study that deals with photochemically induced E f E EET, which will be presented here.…”

Section: Introductionmentioning

confidence: 99%

Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO₂ in Ar Matrices

Gudipati

1997

J. Phys. Chem. A

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An intracage geminate CO···O van der Waals pair is generated through vacuum ultraviolet (VUV) photolysis of 0.1% CO2 in Ar matrices at 18 K. Excitation of CO between 157 and 130 nm (AΠ ← X1Σ+ vibronic transitions) results in a strong emission due to the 1S → 1D transition of O at 560 nm and weak emission bands due to CO and O2. The band at 560 nm is absent in the emission spectra measured from CO in Ar (1:1000) or O2 and CO in Ar (1:1:1000) matrices. The observed phenomenon is due to photochemically induced electronic-to-electronic energy transfer. Excited CO and ground-state O(3P) undergo chemical recombination to result in excited CO2, which dissociates to ground-state CO (X1Σ+) and excited O(1S). Other possible pathways are also discussed but shown to be inappropriate.

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Section: Introductionmentioning

confidence: 99%

Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO₂ in Ar Matrices

Gudipati

1997

J. Phys. Chem. A

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“…The gas mixture was deposited on a 15 K CsI window using the pulse deposition technique. − The low temperature was achieved by means of a Displex closed-cycle refrigerator (SHI-APD Cryogenics, model DE-202). The corresponding FTIR spectra were acquired using the instrument described earlier.…”

Section: Experimental Details and Theoretical Methodsmentioning

confidence: 99%

Structural Analysis of Perfluoropropanoyl Fluoride in the Gas, Liquid, and Solid Phases

et al. 2016

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The coexistence of two conformers in perfluoropropanoyl fluoride, CF3CF2C(O)F, differing in the CC-CF dihedral angle (gauche 85(10)% and anti 15(10)%), has been determined by means of gas-phase electron diffraction (GED). Quantum-chemical calculations performed at the MP2 and B3LYP approximations and cc-pVTZ basis sets reproduce the experimental values with confidence. By contrast, FTIR spectra give no clear evidence for the anti-conformer in the gas phase. Information on this less abundant but stable rotamer is obtained from matrix-isolation/FTIR spectroscopy and liquid Raman spectroscopy. In situ crystallization and single-crystal X-ray diffraction (XRD) data reveal the presence of solely the gauche-conformation in the solid state. A set of intermolecular interactions including C═O···C═O, C-F···F-C, and F···C═O is detected. The nature of bonding and the relative stabilities of gauche- and anti-conformers are explored using natural bond orbitals.

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“…As mentioned above, photolysis of matrix isolated 3,5-bisdiazo-l,2,4-cyclopentanetrione 6 or 3,5-bisdiazo-2,4,6-tetrahydropyranetrione 7 with light of the appropriate wavelength leads mainly to C402 (8).r201 This first dioxide with an even number of carbon atoms was characterized by both, its two IR active stretching modes and one bending vibration. A large number of observed combination bands allowed the indirect determination of three IR inactive fundamentals.…”

Section: Butatrienedione Cdomentioning

confidence: 97%

Matrix Isolation of Chalcogeno Heterocumulenes

1999

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Spectroscopy of Matrix Isolated Species

Cited by 14 publications

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Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO₂ in Ar Matrices

Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO₂ in Ar Matrices

Structural Analysis of Perfluoropropanoyl Fluoride in the Gas, Liquid, and Solid Phases

Matrix Isolation of Chalcogeno Heterocumulenes

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Spectroscopy of Matrix Isolated Species

Cited by 14 publications

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Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO2 in Ar Matrices

Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO2 in Ar Matrices

Structural Analysis of Perfluoropropanoyl Fluoride in the Gas, Liquid, and Solid Phases

Matrix Isolation of Chalcogeno Heterocumulenes

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Product

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Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO₂ in Ar Matrices

Photochemically Induced Electronic-To-Electronic Energy Transfer in Geminate CO···O van der Waals Pair Generated through Vacuum Ultraviolet Photolysis of CO₂ in Ar Matrices