Molecular rotational diffusion detected by differential fluorescence energy

Torga, Jorge; Marconi, M. C.; Negri, R. Martı́n; Aramendı́a, Pedro F.

doi:10.1016/s0301-0104(99)00398-5

Cited by 3 publications

(3 citation statements)

References 16 publications

(9 reference statements)

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“…[30][31][32][33] According to the exciton diffusion theory, 31,34,35 the luminescence decay can be described as [30][31][32][33] According to the exciton diffusion theory, 31,34,35 the luminescence decay can be described as…”

Section: Theoretical Analysis Of Luminescence Quenchingmentioning

confidence: 99%

Luminescence quenching in low doped polymer light-emitting diodes

Chen

Wang

et al. 2008

Journal of Applied Physics

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Transient luminescent dynamics in low doped porphyrin side-chain polymer film, poly͑porphyrin acrylate-styrene͒ ͑P͓͑por͒A-S͔͒, were measured by using time-resolved photoluminescence spectroscopic technology. At relative higher intrachain porphyrin comonomer concentration ͑0.27%͒, the transient luminescence relaxation becomes more rapid with the increase in the interchain polymer concentration, resulting in low luminescence efficiency. The origin has been analyzed according to the Förster-type bimolecular annihilation theory. However, at the porphyrin comonomer concentration ͑0.1%͒, the luminescence relaxation of the P͓͑por͒A-S͔ film becomes faster with the decrease in the interchain polymer concentration, inducing lower luminescence efficiency. The luminescence quenching has been analyzed according to the theory of MM + force field and exciton rotational diffusion. The theoretical analyses are in good agreement with the experimental results.

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Section: Theoretical Analysis Of Luminescence Quenchingmentioning

confidence: 99%

Luminescence quenching in low doped polymer light-emitting diodes

Chen

Wang

et al. 2008

Journal of Applied Physics

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“…The de-excitation by¯uorescence relaxation is also included in the diusion equation giving the following expression for the dierential uorescence signal [11] …”

Section: Dierential¯uorescence For Oblate Moleculesmentioning

confidence: 99%

“…The analysis of the dierential¯uorescence as a function of the delay time between pulses allows the calculation of the molecular rotational times. Recently we measured rotational diusion times in a rhodamine 101 ethylene-glycol solution applying this technique [11], using a 500 ps dye laser to excite the sample, and we obtained results in the nanosecond time scale. In the present work we show results with better temporal resolution extending the method to the picosecond scale.…”

Section: Introductionmentioning

confidence: 99%

Ultra-fast dynamics in Coumarin 153 obtained by differential fluorescence

Torga

Marconi

García‐Segundo

et al. 2001

Optics Communications

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We present measurements of the molecular rotational diusion dynamics in the picosecond scale in a Coumarin 153 ethylene-glycol solution. A novel technique is used in which the¯uorescent sample is excited with two femtosecond laser pulses in a pump and probe scheme. The spatial anisotropy generated by the ®rst pulse excitation is sampled as a function of delay time through the¯uorescence produced by the delayed pulse. The rotational time is obtained from the change in the¯uorescence produced as a function of the delay time. Ó

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