In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector

Hong, H.B.; Choi, C.-J.; Krause, H.-J.; Song, K.

doi:10.1063/1.4742740

Journal Article

In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector

Hong, H. B. ; Krause, H.-J.FZJ* ; Song, K. ; Choi, C.-J.

2012
American Institute of Physics Melville, NY

Applied physics letters 101, 054105 (2012) [10.1063/1.4742740]

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Please use a persistent id in citations: http://hdl.handle.net/2128/7589 doi:10.1063/1.4742740

Abstract: We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, lambda = 254 nm) of hydrogen peroxide (H2O2) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H2O2 produced frequency-mixing signals under UV radiation, but the water signal was much weaker. The root mean square amplitude of the frequency-mixing signal was found to depend on the initial H2O2 concentration. Considering the physical properties of the reactants, the frequency-mixing signal is attributed to the generation of paramagnetic free radicals by the photodecomposition of H2O2. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.47427401

Keyword(s): J

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Physics, Applied

Note: This research was supported financially by the Converging Research Center Program (2011K000677) and the World Class University (WCU) Program (R31-20029) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea.

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