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A Mechanistic Study of Terbium Phosphorescence Quenching

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Judith L. Jenkins and Lawrence E. Welch

Department of Chemistry, Knox College, Galesburg, IL 61401

J. Chem. Educ., 2009, 86 (5), p 613

DOI: 10.1021/ed086p613

Publication Date (Web): May 1, 2009

Section:

History, Education, and Documentation

Abstract

An EDTA complex of terbium(III) was evaluated via phosphorescence spectroscopy in the presence of varying quantities of quencher TEMPOL. Both steady-state excitation via a xenon lamp and pulsed excitation via a nitrogen laser were used to allow the quenching to be evaluated both on the basis of phosphorescence intensity and phosphorescence lifetime. By coupling this information with experimental repeats done at differing temperatures, the students can compare their data with the behavior predicted for several model quenching modes, gaining mechanistic information in the process. Because of the long phosphorescence lifetime of the terbium complex, this experiment is more broadly accessible than most quenching experiments.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Instrumental Methods

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Synthesis of a Photoluminescent and Triboluminescent Copper(I) Compound: An Experiment for an Advanced Inorganic Chemistry Laboratory
Fabio Marchetti, Corrado Di Nicola, Riccardo Pettinari, Ivan Timokhin, and Claudio Pettinari
Journal of Chemical Education2011 Article ASAP
- Synthesis of a Photoluminescent and Triboluminescent Copper(I) Compound: An Experiment for an Advanced Inorganic Chemistry Laboratory
  Fabio Marchetti, Corrado Di Nicola, Riccardo Pettinari, Ivan Timokhin, and Claudio Pettinari
  Journal of Chemical Education2011 Article ASAP
  A simple synthesis is proposed from inexpensive reactants of a copper(I) derivative that exhibits strong photoluminescence and, in the crystalline form, exhibits strong triboluminescence. This laboratory provides an opportunity for introducing students to ...
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