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. 2006 Nov 6;103(46):17113–17118. doi: 10.1073/pnas.0602130103

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© 2006 by The National Academy of Sciences of the USA

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Fig. 4. — 35-GHz ENDOR spectra. (A) ¹⁵N Mims ENDOR spectra of m(CH₃NNH). For H¹⁵NNCH₃, ν = 34.808 GHz, g = 2.03, π/2 = 52 ns, τ = 400 ns, T = 25.352 μs, radio frequency (RF) = 20 μs, eight scans, 30 shots per point, 20-ms shot repetition time, 2 K. For HN¹⁵NCH₃, ν = 34.784 GHz, and other conditions are the same as for H¹⁵NNCH₃. Spectra are normalized for comparison. (B) As in A, but narrower scan and g = 2.01, τ = 552 ns, and 15 scans. Backgrounds have been corrected by simple subtractions as needed. (C) Continuous wave (CW) ¹H-ENDOR of m(CH₃NNH) in H₂O and D₂O. Conditions were: microwave frequency of 35.057–35.171 GHz, modulation amplitude = 4 G, RF sweep speed = 1 MHz/s, bandwidth of RF broadened to 100 kHz, 2 K. Methyldiazene is abbreviated as HNNMe.

Inline graphic — 35-GHz ENDOR spectra. (A) ¹⁵N Mims ENDOR spectra of m(CH₃NNH). For H¹⁵NNCH₃, ν = 34.808 GHz, g = 2.03, π/2 = 52 ns, τ = 400 ns, T = 25.352 μs, radio frequency (RF) = 20 μs, eight scans, 30 shots per point, 20-ms shot repetition time, 2 K. For HN¹⁵NCH₃, ν = 34.784 GHz, and other conditions are the same as for H¹⁵NNCH₃. Spectra are normalized for comparison. (B) As in A, but narrower scan and g = 2.01, τ = 552 ns, and 15 scans. Backgrounds have been corrected by simple subtractions as needed. (C) Continuous wave (CW) ¹H-ENDOR of m(CH₃NNH) in H₂O and D₂O. Conditions were: microwave frequency of 35.057–35.171 GHz, modulation amplitude = 4 G, RF sweep speed = 1 MHz/s, bandwidth of RF broadened to 100 kHz, 2 K. Methyldiazene is abbreviated as HNNMe.