Chemiluminescence arising from the interaction of rubrene with intermediates derived from hydrogen peroxide and bis(2,4-dinitrophenyl) oxalate (DNPO): quantum yield and carbondioxide yield
✍ Scribed by György Orosz; Richard S. Givens; Richard L. Schowen
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 425 KB
- Volume
- 266
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
The reactlon at room temperature of 0 25 M hydrogen peroxide mth 12 3 mM b&2,4dmltrophenyI) oxalate (DNPO) m tetrahydrofuran solvent m the presence of the fluorophore rubrene and 13 6 mM tetrabutylammonmm perchlorate yields a burst of chemdummescence m which the Intensity rmzs rapidly and decays more slowly, as m many analogous systems Double-reciprocal plots of quantum yield as a function of rubrene concentration (O-1 03 mM) are hnear with a saturation constant of about 0 5 mM, smular to that found under other conddlons The decay m mtenslty of chemAmunescence was approxunately exponential Hnth a tune constant of about 5 x Xl-* s-l, independent of the rubrene concentration The DIWO concentration fell with a me constant of about 3 x lo-* s-l, also independent of the rubrene concentration Information on the final yield of carbon dlonde m this system was obtamed by measurement of the mfrared abxuptlon mtenslty at 2336 cm-' The absorbance IS linear m quantum yield at rubrene concentrations from 0 02 to 1 mM, the absorbance appronmately doubhng as the quantum yield rises from zero to 0 013 The results m&cate that a common mtermedlate generates both carbon dlonde and photons m a fluorophore-dependent manner