Fluorescence Quenching in Microheterogeneous Media: A Laboratory Experiment Determining Micelle Aggregation Number

In the present work we describe a simple procedure for measuring micelle aggregation numbers of surfactants, which has been designed to introduce students to heterogeneous systems and the techniques by which their physical and chemical properties may be determined. This method is based on the spectr...

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Published in:Journal of chemical education 1995-07, Vol.72 (7), p.662
Main Authors: Prieto, M. Flor Rodríguez, Rodríguez, M. Carmen Ríos, González, Manuel Mosquera, Rodríguez, Ana M. Ríos, Fernández, Juan Carlos Mejuto
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Language:English
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container_issue 7
container_start_page 662
container_title Journal of chemical education
container_volume 72
creator Prieto, M. Flor Rodríguez
Rodríguez, M. Carmen Ríos
González, Manuel Mosquera
Rodríguez, Ana M. Ríos
Fernández, Juan Carlos Mejuto
description In the present work we describe a simple procedure for measuring micelle aggregation numbers of surfactants, which has been designed to introduce students to heterogeneous systems and the techniques by which their physical and chemical properties may be determined. This method is based on the spectroscopic properties of molecules acting as "probes" and it provides, the student with additional experience in fluorescence spectroscopy. By using this technique, with sodium dodecyl sulfate as surfactant, cetylpiridinium chloride as quencher, and pyrene as the probe, micelle aggregation numbers in good agreement with published values can be found.
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title Fluorescence Quenching in Microheterogeneous Media: A Laboratory Experiment Determining Micelle Aggregation Number
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