Red-edge excitation fluorescence study of the inhomogeneous broadening of electronic transitions in solution

1996 ◽  
Vol 92 (4) ◽  
pp. 629 ◽  
Author(s):  
Michael J. E. Morgenthaler ◽  
Keitaro Yoshihara ◽  
Stephen R. Meech
Keyword(s):  
Inhomogeneous Broadening ◽  
Electronic Transitions ◽  
Fluorescence Study ◽  
Red Edge

What Determines Inhomogeneous Broadening of Electronic Transitions in Conjugated Polymers?

2010 ◽  
Vol 114 (51) ◽  
pp. 17037-17048 ◽  
Author(s):  
Sebastian T. Hoffmann ◽  
Heinz Bässler ◽  
Anna Köhler
Keyword(s):  
Conjugated Polymers ◽  
Inhomogeneous Broadening ◽  
Electronic Transitions

Up-Conversion and Two-Photon Excitation Fluorescence Properties of Phloxine B.

1999 ◽  
Vol 5 (S2) ◽  
pp. 500-501
Author(s):  
Henryk Malak
Keyword(s):  
Present Report ◽  
Electronic Transitions ◽  
Active Components ◽  
Fluorescent Properties ◽  
Fluorescence Excitation ◽  
Time Resolved ◽  
Two Photon ◽  
Red Edge ◽  
Photon Excitation ◽  
Two Photon Excitation

A dye, Phloxine B, a common food coloring and one of the active components of a photoreactive insecticide was recently approved by Food and Drug Administration as D&C Red #28 for use in drugs and cosmetics. Phloxine B is also one of the most widely use stain in fluorescence microscopy. However, in spite of the widespread interest in multi-photon spectroscopy and imaging, no information is available on the electronic transitions properties of Phloxine B with red edge fluorescence excitation and with multi-photon excitation.In the present report we described the steady state and time-resolved fluorescent properties of Phloxine B with up-convert photon excitation and with two-photon excitation. We examined the electronic transitions properties of Phloxine B when was excited by femtosecond pulses from a mode-locked titanium sapphire laser or a mode-locked optical parametric oscillator laser. Phloxine B under excitation wavelengths above 775 nm was found to display two-photon excitation fluorescence with a spectrum maximum at 580 nm, which emission is consistent with one-photon excitation fluorescence spectrum. At the red edge excitation of Phloxine B, from 590 nm to 650 nm, we observed one-photon excitation fluorescence indicating that Phloxine B behaves like upconverting dye with one-photon excitation process.

Anomalous Inhomogeneous Broadening of Electronic Spectra of Molecules with Internal Charge Transfer

2003 ◽  
Vol 58 (9-10) ◽  
pp. 529-536 ◽  
Author(s):  
V. I. Tomin ◽  
K. Hubisz ◽  
Z. Mudryka
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Electronic Spectra ◽  
Inhomogeneous Broadening ◽  
Electronic Transitions ◽  
Polar Solvents ◽  
Internal Charge Transfer ◽  
Internal Charge

Excited states with internal charge transfer of some molecules show an anomalously strong inhomogeneous broadening of their electronic spectra. Here such an inhomogeneous broadening for N, N-dimethylaminobenzonithrile (DMABN) was studied. The spectral inhomogeneity for DMABN in some polar solvents reaches 140 - 150 nm.The interpretation of the obtained results is based on treating a solution as a set of chemically identical solvates with a luminophor molecule in the centre, having different energies of the pure electronic transitions. The inhomogeneity arises due to an intermolecular effect of the luminophors environment on its spectra in polar solvents, as well as a process of intramolecular movement of the twisting fragments relative to the main moiety of DMABN.

3d-4s and 3d-4p electronic transitions in M2+ : NaF AND M2+ : KMgF3 (Μ = V, Cr, and Mn). Results of a cluster-model calculation

1987 ◽  
Vol 84 ◽  
pp. 855-861 ◽  
Author(s):  
M. Flórez ◽  
M. Bermejo ◽  
V. Luaña ◽  
E. Francisco ◽  
J.M. Recio ◽  
...  
Keyword(s):  
Model Calculation ◽  
Cluster Model ◽  
Electronic Transitions
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