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- W2065676536 abstract "Perylene emission intensity generated from peroxyoxalate chemiluminescence (PO-CL) reactions was studied as a function of time and order of reagent addition. Based on 1H-NMR analyses, kinetics of UV absorbance and emission intensity vs. time profiles, we conclude that PO-CL reactions in the presence of imidazole (ImH) can proceed by three distinct reaction pathways depending on how the reagents are mixed together. When bis(2,4,6-trichlorophenyl) oxalate (TCPO) is mixed simultaneously with H2O2, ImH and perylene, a slowly decaying emission curve is generated from the interaction between perylene and a high-energy intermediate (i.e., six- or eight-membered cyclic compound) formed by the ImH-catalyzed nucleophilic reaction (TCPO-CL reaction). Upon mixing TCPO simultaneously with ImH and perylene in the absence of H2O2, however, distinctly different CL curves of lower intensity are generated from the interaction between perylene and a new, unknown high-energy intermediate formed from the reaction between the aryl oxalate and ImH. Finally, using 1H-NMR, we observed that 1,1′-oxalyldiimidazole (ODI) is also formed from the reaction between TCPO and ImH. When ODI reacts with excess H2O2 in the presence of perylene, a higher intensity and relatively fast decaying emission curve is generated (ODI-CL reaction) from the interaction between perylene and the high-energy intermediate produced, which we propose is imidazolylhydroxydioxetanone or 1,2-dioxetanedione." @default.
- W2065676536 created "2016-06-24" @default.
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- W2065676536 date "2002-03-04" @default.
- W2065676536 modified "2023-10-17" @default.
- W2065676536 title "Study of the characteristics of three high-energy intermediates generated in peroxyoxalate chemiluminescence (PO-CL) reactions" @default.
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- W2065676536 doi "https://doi.org/10.1039/b109210c" @default.
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