Robert Calhoun - Electrogenerated Chemiluminescence (ECL) Quenching of Ru(bpy)32+ by the Explosives TATP and Tetryl

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  Shaw, A., Lindhome, P., Calhoun, R. L. Journal of The   Electrochemical Society 2013 160  (10 ) H782 -H786

  Abstract: Interaction of the explosives   triacetone triperoxide (TATP) and Tetryl   (2,4,6-Trinitrophenylmethylnitramine) with the electrogenerated   chemiluminescence (ECL) of Tris(2,2′ bipyridine)ruthenium (II)   ion (Ru(bpy)32+) in acetonitrile (MeCN) was studied. Both   analytes greatly reduce the light made during the annihilation   mechanism yielding ppb level detection. The quenching mechanism   for TATP is thought to be EEC′ during reduction which reduces the   light by oxidizing the Ru(bpy)3+ before it can react with   Ru(bpy)33+ with a rate constant estimate of 4.8 × 104 M−1 s−1.   The Tetryl quenching mechanism is less clear, in part, because   the molecule is also a fluorescence quencher with behavior   suggesting both static and dynamic quenching.

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