Microwave spectra of vibrationally excited states of azulene

Abstract The pure rotational spectra of molecules in 21 vibrationally excited states of the heterocyclic compound furazan (C2H2N2O) have been detected and studied by DRM microwave spectroscopy. Rotational parameters are reported for the 12 fundamental levels below 1500 cm-1 , and the contri-butions from 10 vibrational modes to the effective rotational constants and to the inertia defect of furazan are calculated.

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Microwave spectra of thionyl fluoride in vibrationally excited states

Journal of Molecular Spectroscopy ◽

10.1016/0022-2852(73)90180-x ◽

1973 ◽

Vol 45 (1) ◽

pp. 114-119 ◽

Cited By ~ 7

Author(s):

D.F. Rimmer ◽

J.G. Smith ◽

D.H. Whiffen

Keyword(s):

Excited States ◽

Vibrationally Excited ◽

Microwave Spectra

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Microwave spectra of phosphoryl trifluoride in vibrationally excited states

Molecular Physics ◽

10.1080/00268977600102091 ◽

1976 ◽

Vol 32 (3) ◽

pp. 621-645 ◽

Cited By ~ 38

Author(s):

J.G. Smith

Keyword(s):

Excited States ◽

Vibrationally Excited ◽

Microwave Spectra

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Equilibrium structure and anharmonic potential function of phosgene: Microwave spectra of vibrationally excited states

Journal of Molecular Spectroscopy ◽

10.1016/0022-2852(84)90220-0 ◽

1984 ◽

Vol 105 (2) ◽

pp. 299-313 ◽

Cited By ~ 21

Author(s):

Satoshi Yamamoto ◽

Munetaka Nakata ◽

Masaaki Sugie ◽

Harutoshi Takeo ◽

Chi Matsumura ◽

...

Keyword(s):

Potential Function ◽

Excited States ◽

Equilibrium Structure ◽

Vibrationally Excited ◽

Microwave Spectra ◽

Anharmonic Potential

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The microwave spectra of NSF3 in vibrationally excited states

Molecular Physics ◽

10.1080/00268977900103101 ◽

1979 ◽

Vol 37 (3) ◽

pp. 665-679 ◽

Cited By ~ 9

Author(s):

C.E. Small ◽

J.G. Smith

Keyword(s):

Excited States ◽

Vibrationally Excited ◽

Microwave Spectra

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HIGH-RESOLUTION LASER SPECTROSCOPY OF S1-S0 TRANSITION OF NAPHTHALENE: MEASUREMENT OF VIBRATIONALLY EXCITED STATES

Proceedings of the 70th International Symposium on Molecular Spectroscopy ◽

10.15278/isms.2015.fa09 ◽

2015 ◽

Author(s):

Takumi Nakano ◽

Shunji Kasahara ◽

Ryo Yamamoto

Keyword(s):

High Resolution ◽

Excited States ◽

Laser Spectroscopy ◽

Vibrationally Excited

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Excited-State Dynamics in the RNA Nucleotide Uridine 5’-Monophosphate Investigated by Femtosecond Broadband Transient Absorption Spectroscopy

10.26434/chemrxiv.7860023 ◽

2019 ◽

Author(s):

Matthew M. Brister ◽

Carlos Crespo-Hernández

Keyword(s):

Excited State ◽

Excited States ◽

Ground State ◽

Transient Absorption ◽

Electronic Energy ◽

Transient Absorption Spectroscopy ◽

Electronic Relaxation ◽

Vibrationally Excited ◽

Excited State Dynamics ◽

Π State

Damage to RNA from ultraviolet radiation induce chemical modifications to the nucleobases. Unraveling the excited states involved in these reactions is essential, but investigations aimed at understanding the electronic-energy relaxation pathways of the RNA nucleotide uridine 5’-monophosphate (UMP) have not received enough attention. In this Letter, the excited-state dynamics of UMP is investigated in aqueous solution. Excitation at 267 nm results in a trifurcation event that leads to the simultaneous population of the vibrationally-excited ground state, a longlived 1nOπ* state, and a receiver triplet state within 200 fs. The receiver state internally convert to the long-lived 3ππ* state in an ultrafast time scale. The results elucidate the electronic relaxation pathways and clarify earlier transient absorption experiments performed for uracil derivatives in solution. This mechanistic information is important because long-lived nπ* and ππ* excited states of both singlet and triplet multiplicities are thought to lead to the formation of harmful photoproducts.

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The Microwave Spectrum of 3,4-Dihydro-1,2-Pyran

Zeitschrift für Naturforschung A ◽

10.1515/zna-1985-0909 ◽

1985 ◽

Vol 40 (9) ◽

pp. 913-919

Author(s):

Juan Carlos López ◽

José L. Alonso

Keyword(s):

Dipole Moment ◽

Excited States ◽

Ground State ◽

Principal Axis ◽

Microwave Spectrum ◽

Average Intensity ◽

Ring Conformation ◽

Vibrationally Excited ◽

Rotational Constants ◽

Displacement Measurements

Abstract The rotational transitions of 3,4-dihydro-1,2-pyran in the ground state and six vibrationally excited states have been assigned. The rotational constants for the ground state (A = 5198.1847(24), B = 4747.8716(24) and C = 2710.9161(24) have been derived by fitting μa, μb and μc-type transitions. The dipole moment was determined from Stark displacement measurements to be 1.400(8) D with its principal axis components |μa| =1.240(2), |μb| = 0.588(10) and |μc| = 0.278(8) D. A model calculation to reproduce the ground state rotational constants indicates that the data are consistent with a twisted ring conformation. The average intensity ratio gives vibrational separations between the ground and excited states of the ring-bending and ring-twisting modes of ~ 178 and ~ 277 cm-1 respectively.

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