Lifetime broadening in the gas phase B̃2Π←X̃2Π electronic spectrum of C8H

Birza, Petre; Khoroshev, Dmitriy; Chirokolava, Andrei; Motylewski, T.; Maier, John P.

doi:10.1016/j.cplett.2003.10.092

Cited by 9 publications

(5 citation statements)

References 20 publications

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“…The details have been given [16]. CCCH 2 was produced by a discharge (À800 V, 120 mA) through a gas mixture of 0.2% acetylene in helium with a backing pressure of 11 bar.…”

Section: Methodsmentioning

confidence: 99%

Rotationally resolved electronic spectrum of propadienylidene

Birza

Chirokolava

Araki

et al. 2005

Journal of Molecular Spectroscopy

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“…The details have been given [16]. CCCH 2 was produced by a discharge (À800 V, 120 mA) through a gas mixture of 0.2% acetylene in helium with a backing pressure of 11 bar.…”

Section: Methodsmentioning

confidence: 99%

Rotationally resolved electronic spectrum of propadienylidene

Birza

Chirokolava

Araki

et al. 2005

Journal of Molecular Spectroscopy

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“…A second consequence of the ultrafast CS in these dyads is that it leads to a lifetime broadening of the LES←S 0 transition. Although this lifetime broadening is known in the gas phase, [47][48][49] or at very low temperatures, [50][51][52] such clear correlation between the excitedstate lifetime and the absorption bandwidth was, to the best of our knowledge, never reported so far for organic systems in room-temperature solution. In fact, this effect might not be so uncommon and could, for example, underlie the spectral changes often observed upon addition of high concentrations of quenchers to solutions of chromophores.…”

Section: Ion Pairmentioning

confidence: 70%

Lifetime Broadening and Impulsive Generation of Vibrational Coherence Triggered by Ultrafast Electron Transfer

Aster

Bornhof

Sakai

et al. 2021

J. Phys. Chem. Lett.

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The absorption bandshape of chromophores in liquid solution at room temperature is usually dominated by pure electronic dephasing dynamics, which occurs on the sub-100 fs timescale. Herein, we report on a series of dyads consisting of a naphtalenediimide (NDI) electron acceptor with one or two phenyl-based donors for which photoinduced intramolecular electron transfer is fast enough to be competitive with pure electronic dephasing. As a consequence, the absorption band of the π-π * transition of these dyads

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“…Because this is not observed, it is assumed that the ν 3 and the ν 4 modes undergo lifetime broadening, most likely due to internal conversion. It is noted that the next carbon chain molecule in the C 2 n H series, C 8 H, also exhibits lifetime broadening already in its origin band . For the moment, we leave the latter issues as outside the scope of the present work.…”

Section: Discussionmentioning

confidence: 98%

“…It is noted that the next carbon chain molecule in the C 2n H series, C 8 H, also exhibits lifetime broadening already in its origin band. 38 For the moment, we leave the latter issues as outside the scope of the present work. Fluorescence studies, similarly as performed for the C 4 H molecule, 39 might clarify some of the dynamics.…”

Section: The 2 π Levelsmentioning

confidence: 99%

Spectroscopic Survey of Electronic Transitions of C₆H, ¹³C₆H, and C₆D

et al. 2016

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Electronic spectra of C 6 H are measured in the 18 950´21 100 cm´1 domain using cavity ring-down spectroscopy of a supersonically expanding hydrocarbon plasma. In total, 19 (sub)bands of C 6 H are presented, all probing the vibrational manifold of the B 2 Π electronically excited state. The assignments are guided by electronic spectra available from matrix isolation work, isotopic substitution experiments (yielding also spectra for 13 C 6 H and C 6 D), predictions from ab initio calculations as well as rotational fitting and vibrational contour simulations using the available ground state parameters as obtained from microwave experiments. Besides the 0 0 0 origin band, three non-degenerate stretching vibrations along the linear backbone of the C 6 H molecule are assigned: the ν 6 mode associated with the C-C bond vibration and the ν 4 and ν 3 modes associated with C"C triple bonds. For the two lowest ν 11 and ν 10 bending modes, a Renner-Teller analysis is performed identifying the µ 2 Σ(ν 11 ) and both µ 2 Σ(ν 10 ) and κ 2 Σ(ν 10 ) components. In addition, two higher lying bending modes are observed, which are tentatively assigned as µ 2 Σ(ν 9 ) and µ 2 Σ(ν 8 ) levels. In the excitation region below the first non-degenerate vibration (ν 6 ), some 2 Π´2Π transitions are observed that are assigned as even combination modes of low-lying bending vibrations. The same holds for a 2 Π´2Π transition found above the ν 6 level. From these spectroscopic data and the vibronic analysis a comprehensive energy level diagram for the B 2 Π state of C 6 H is derived and presented.

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Lifetime broadening in the gas phase B̃2Π←X̃2Π electronic spectrum of C8H

Cited by 9 publications

References 20 publications

Rotationally resolved electronic spectrum of propadienylidene

Rotationally resolved electronic spectrum of propadienylidene

Lifetime Broadening and Impulsive Generation of Vibrational Coherence Triggered by Ultrafast Electron Transfer

Spectroscopic Survey of Electronic Transitions of C₆H, ¹³C₆H, and C₆D

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Lifetime broadening in the gas phase B̃2Π←X̃2Π electronic spectrum of C8H

Cited by 9 publications

References 20 publications

Rotationally resolved electronic spectrum of propadienylidene

Rotationally resolved electronic spectrum of propadienylidene

Lifetime Broadening and Impulsive Generation of Vibrational Coherence Triggered by Ultrafast Electron Transfer

Spectroscopic Survey of Electronic Transitions of C6H, 13C6H, and C6D

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Spectroscopic Survey of Electronic Transitions of C₆H, ¹³C₆H, and C₆D