Lead as Its Own Luminescent Sensor

Lead (II) in polar organic solvents such as acetone, acetonitrile, and propylenecarbonate with excess bromide generates the highly luminescent lead−halide cluster Pb4Br11 3-. This in situ sensor does not rely on a host−guest relationship and, thus, is intrinsically selective and sensitive, allowing...

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Bibliographic Details
Published in:Inorganic chemistry 2002-12, Vol.41 (26), p.6938-6940
Main Authors: Dutta, Subodh K, Perkovic, Marc W
Format: Article
Language:English
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Summary:Lead (II) in polar organic solvents such as acetone, acetonitrile, and propylenecarbonate with excess bromide generates the highly luminescent lead−halide cluster Pb4Br11 3-. This in situ sensor does not rely on a host−guest relationship and, thus, is intrinsically selective and sensitive, allowing for the detection of lead at nanomolar concentrations. The cluster's emission maximum and relaxation kinetics are temperature dependent and indicate a close spacing of intralead and intracluster electronic energy levels.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic0260724