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Polar solvation dynamics of coumarin 153 by ultrafast time-resolved fluorescence
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10.1063/1.3276680
/content/aip/journal/jcp/131/24/10.1063/1.3276680
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/24/10.1063/1.3276680

Figures

Image of FIG. 1.
FIG. 1.

Time-resolved emission spectra of coumarin 153 in (a) acetonitrile and (b) methanol. Their lognormal fitted curves for the 0 fs and 200 ps spectra are shown in the lower panel.

Image of FIG. 2.
FIG. 2.

(a) Second moments of the time-resolved emission spectra of coumarin 153 in acetonitrile (filled square), methanol (filled triangle), and butanol (empty square). (b) The asymmetry parameter from the lognormal fits for methanol. Inset shows data out to 100 ps.

Image of FIG. 3.
FIG. 3.

Spectral parameters—center frequency (in , square), width (in , triangle), and asymmetry (circle)—for the TRF spectra of coumarin 153 in butanol.

Image of FIG. 4.
FIG. 4.

Center frequency (first moment) vs time (solid line) for coumarin 153 in butanol, and the fluorescence time profile (dashed line) in acetonitrile detected at 490 nm are shown in the bottom panel. The oscillation spectrum obtained from the LPSVD analysis is shown in the top panel.

Image of FIG. 5.
FIG. 5.

(a) Solvation response function for coumarin 153 in acetonitrile (filled square), methanol (filled triangle), and butanol (empty square) up to 1 ps. (b) Solvation response excluding the oscillatory part.

Tables

Generic image for table
Table I.

First moment , width , and Stokes shift [spectra at 200 ps (or 500 ps for butanol) were regarded as the fully relaxed ] of time-zero fluorescence spectrum.

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Table II.

The oscillatory components of fluorescence time profile of C153 in acetonitrile at 490 nm.

Generic image for table
Table III.

Normal mode frequencies at equilibrium geometries in the ground and the excited states of C153, normal mode projected displacements , and reorganization energies .

Generic image for table
Table IV.

Multiexponential parameters of fitted with the function in the form of . In the fitting, frequencies of the damped sinusoids are fixed to the LPSVD result shown in Table II.

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/content/aip/journal/jcp/131/24/10.1063/1.3276680
2009-12-28
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polar solvation dynamics of coumarin 153 by ultrafast time-resolved fluorescence
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/24/10.1063/1.3276680
10.1063/1.3276680
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