The ratio of peak III to peak I intensities of the so-called III and I fluorescence bands of pyrene increases dramatically when cupric ions are used as quenchers for pyrene emission in sodium dodecyl sulfate micelles. These results indicate a decrease in the polarity sensed by the probe when its lif
Effect of irradiation intensity on luminescence quenching kinetics in micellar systems
โ Scribed by A.V. Barzykin; M. Tachiya
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 413 KB
- Volume
- 221
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
A stochastic model for luminescence quenching in monodisperse micellar systems is treated without any restriction on the intensity of irradiation. Both time-resolved and steady-state observables are calculated. It is found that the luminescence intensity is given by the convolution product of the sample response function of the system corresponding to the &pulse excitation and the instrument response function only in the limit of low excitation efficiency. It is shown that one of the basic assumptions of the original stochastic model that a micelle should contain at most one excited probe is not necessary provided intramicellar quenching follows pseudo-first-order kinetics.
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