Excited singlet- and triplet-absorptions of pentaphene

Menzel, Ralf; Rapp, W.

doi:10.1016/0301-0104(84)85070-3

Cited by 23 publications

(7 citation statements)

References 19 publications

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“…5 Similar approaches work for pump− probe spectroscopy with nanosecond time resolution. 6 For picosecond pulses, time-dependent rotational alignment 5 must be considered for molecules in liquids. 7 For femtosecond pulses, the frequency dependence of the electronic transition probability becomes important.…”

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confidence: 99%

Absolute Measurement of Femtosecond Pump–Probe Signal Strength

et al. 2013

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The absolute femtosecond pump-probe signal strength of deprotonated fluorescein in basic methanol is measured. Calculations of the absolute pump-probe signal based on the steady-state absorption and emission spectrum that use only independently measured experimental parameters are carried out. The calculation of the pump-probe signal strength assumes the pump and probe fields are both weak and includes the following factors: the transverse spatial profile of the laser beams; the pulse spectra; attenuation of the propagating pulses with depth in the sample; the anisotropic transition probability for polarized light; and time-dependent electronic population relaxation. After vibrational and solvent relaxation are complete, the calculation matches the measurement to within 10% error without any adjustable parameters. This demonstrates quantitative measurement of absolute excited state population.

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confidence: 99%

Absolute Measurement of Femtosecond Pump–Probe Signal Strength

et al. 2013

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“…involved triplet populations), or forms aggregates, which increases the cross section, Cases (i) and (ii) can be realized by the compensation of the other effects. From comparing the switch graph with the fluorescence intensity graph [16] this effect can usually be clarified.…”

Section: Start Of Bleachingmentioning

confidence: 99%

“…In the rate equations no spatial pattern of the excitation beam is recognized. Therefore only the inner part of the spatial distribution should be used (apertures, see, e.g., [16]). The right-angle or co-or contralinear arrangement of excitation and probe light can be considered explicitly.…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…The algebraic system equations (16) and (17) can be solved analytically to the general form [18,19,27]. The concrete problem can be solved easily by using one of the computer programs for symbolic computations (e.g.…”

Section: Analytical Solution For the Population Densitiesmentioning

confidence: 99%

“…Although the first observation of excited state absorption in the triplet [1] and singlet [2,3] system were done more than 45 and 20 years ago and numerous publications described ESA spectra qualitatively (as optical density), only few ESA cross sections were determined quantitatively (see [4][5][6][7][8][9][10][11][12][13][14][15][16]). The main problem of the quantitative evaluation of the high intensity measurements is the determination of the population densities of all occupied states for the performed experiment.…”

Section: Introductionmentioning

confidence: 99%

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Modelling excited state absorption (ESA) measurements including the photophysical hole burning effect with rate equations

Menzel

1989

Molecular Physics

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To cite this article: Ralf Menzel (1989) Modelling excited state absorption (ESA) measurements including the photophysical hole burning effect with rate equations, Molecular Excited state absorption measurements have usually to be modelled for the determination of the population densities in the different occupied excited states. Rate equations can be used for this purpose if the described experimental conditions are fulfilled. The photophysical hole burning (PPHB) effect may then be considered in an elementary way. Finally the decay rates of the different states and the holes can be determined. Fast routines for solving the system of differential equations are given allowing for an easy interactive analysis of the measurements on personal computers. The behaviour of the solutions for the two simplest models is discussed. The experimental results of PPHB measurements on crystal violet in 2-propanol were modelled using this formalism.

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Photophysical hole burning on dye solutions in the liquid phase with ns‐laserpuises

Menzel¹,

Witte²

1987

Ber Bunsenges Phys Chem

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The necessary conditions for observing inhomogeneous bleaching of the electronic absorption bands of organic molecules in solution at room temperature have been investigated by simple rate equation models. For systems with ground state recovery times in the ps‐range, photophysical hole burning (PPHB) can be obtained with the ns‐laserpulses. The measured experimental result for crystal violet in acetonitrile may serve as an example. In transitions between excited states PPHB is possible as an universal method on probably all organic molecules. This has been demonstrated for the S1‐absorption band of para‐terphenyl at 570 nm. The given brief outline of methods, results, and conclusions will be described separately in more detail.

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Excited singlet- and triplet-absorptions of pentaphene

Cited by 23 publications

References 19 publications

Absolute Measurement of Femtosecond Pump–Probe Signal Strength

Absolute Measurement of Femtosecond Pump–Probe Signal Strength

Modelling excited state absorption (ESA) measurements including the photophysical hole burning effect with rate equations

Photophysical hole burning on dye solutions in the liquid phase with ns‐laserpuises

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