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Article

Luminescence Quenching in Microemulsion Studies

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Holger Mays

Department of Physical Chemistry, Uppsala University, Box 532, S-751 21 Uppsala, Sweden

J. Chem. Educ., 2000, 77 (1), p 72

DOI: 10.1021/ed077p72

Publication Date (Web): January 1, 2000

Section:

History, Education, and Documentation

Abstract

The article presents easy time-resolved luminescence quenching experiments for advanced students and for specialized courses such as surfactant science or reaction kinetics. The focus is the dynamics of microemulsions, but a broad range of modern physical chemistry is covered. The systems under investigation, percolating water-in-oil microemulsions, are related to subjects such as self-assembly of surfactants, colloidal particles, nanostructures, and percolation theory. A probing technique employing Tb(pda)33{ is discussed, which instructs students in metal complex chemistry, quantum mechanics, photochemistry and photophysics, and statistics. Aspects of reaction kinetics and thermodynamics are encountered on the basis of probe deactivation in clustering systems. The experiments reveal the links between often separately treated subjects and combine essential topics with the subject of colloid science, which is often not adequately considered in chemical education. The necessary equipment is commercially available and widespread at universities; it can also be easily constructed. The required chemicals are relatively harmless and easy to obtain.