Direct Observation of a Quasilocalized Low-Frequency Vibrational Mode in the Fluorescence Excitation Spectrum of a Single Impurity Molecule in a Polymer Matrix

2019 ◽  
Vol 126 (1) ◽  
pp. 44-48 ◽  
Author(s):  
A. O. Savostianov ◽  
I. Yu. Eremchev ◽  
A. A. Gorshelev ◽  
S. V. Orlov ◽  
A. S. Starukhin ◽  
...  
Keyword(s):  
Excitation Spectrum ◽  
Direct Observation ◽  
Polymer Matrix ◽  
Vibrational Mode ◽  
Low Frequency ◽  
Fluorescence Excitation Spectrum ◽  
Impurity Molecule ◽  
Fluorescence Excitation ◽  
Single Impurity

scholarly journals Прямое наблюдение квазилокализованной низкочастотной колебательной моды в спектре возбуждения флуоресценции одиночной примесной молекулы в полимерной матрице-=SUP=-*-=/SUP=-

2019 ◽  
Vol 126 (1) ◽  
pp. 53
Author(s):  
А.О. Савостьянов ◽  
И.Ю. Еремчев ◽  
А.А. Горшелев ◽  
С.В. Орлов ◽  
А.С. Старухин ◽  
...  
Keyword(s):  
Vibrational Mode ◽  
Excited Electronic State ◽  
Low Frequency ◽  
Local Environment ◽  
Fluorescence Excitation Spectrum ◽  
Elementary Excitation ◽  
Impurity Molecule ◽  
Fluorescence Excitation ◽  
Mode Spectrum ◽  
Electron Phonon Interaction

AbstractThe possibility of direct observation of a quasi-localized elementary excitation of the phonon type in polyisobutylene has been demonstrated by detecting the fluorescence excitation spectrum of a Mg‑tetrazaporphyrin single probe molecule in a wide spectral range at a temperature of 6 K. The parameters of the quasilocalized low-frequency vibrational mode have been measured—the frequency (energy) in the case, when impurity molecule is in excited electronic state (ω_ e = 13.94 ± 0.21 cm^–1) and the halfwidth of the mode spectrum (γ = 3.82 ± 0.66 cm^–1). The measured energy of the low-frequency vibrational mode coincides with the position of a boson peak maximum in the spectrum of vibrational states of the polymer, which indicates that the weak coupling approach can be applied to the considered case of the electron–phonon interaction of an organic dye molecule with the local environment in a polymer matrix.

Two-Photon Fluorescence Excitation Spectrum of 1,6-Methano-[10]annulene

2000 ◽  
Vol 104 (28) ◽  
pp. 6566-6572 ◽  
Author(s):  
Lorenzo Catani ◽  
Cristina Gellini ◽  
Laura Moroni ◽  
Pier Remigio Salvi
Keyword(s):  
Excitation Spectrum ◽  
Fluorescence Excitation Spectrum ◽  
Fluorescence Excitation ◽  
Two Photon ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

Isotope shifts in the Cl2B–X system

1988 ◽  
Vol 66 (8) ◽  
pp. 721-723
Author(s):  
G. Gouédard ◽  
N. Billy ◽  
B. Girard ◽  
J. Vigué
Keyword(s):  
Excitation Spectrum ◽  
Fluorescence Excitation Spectrum ◽  
Abundant Species ◽  
Precise Determination ◽  
Dye Laser ◽  
Fluorescence Excitation ◽  
Isotope Shifts ◽  
Quantum Numbers ◽  
Interpolation Procedure

We have studied the fluorescence excitation spectrum of natural Cl2 molecules induced by a monomode ring dye laser around various X(ν″ = 0) → B(ν′ ≥ 18) bandheads. Contrary to the main 35–35Cl2 isotope, the less abundant species 35–37Cl2 and 37–37Cl2 have not, up to now, been thoroughly investigated in this region. Our experiment has allowed a precise determination of a number of isotope shifts, which are shown to be calculable by a local interpolation procedure of Coxon's data, using the concept of mass-reduced quantum numbers.

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