Pulsed electron nuclear double and triple resonance schemes

Mehring, M.; Höfer, Peter; Grupp, A.

doi:10.1002/bbpc.19870911111

Cited by 54 publications

(32 citation statements)

References 18 publications

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“…The majority of them provides only the relative signs of two hfcc with respect to each other. Most commonly used is the electron-nuclear-nuclear TRIPLE experiment [2,[13][14][15][16]. By this method the correlation between the nuclear transition frequencies of different nuclei is established, which leads to the determination of the relative signs of their hfccs.…”

Section: Introductionmentioning

confidence: 99%

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Absolute signs of hyperfine coupling constants as determined by pulse ENDOR of polarized radical pairs

Epel¹,

Niklas²,

Antonkine

et al. 2006

Appl. Magn. Reson.

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A novel method that allows the determination of absolute signs of hyperfine coupling constants in polarized radical pair (RP) pulse electron-nuclear double resonance (ENDOR) spectra is presented. The va¡ mixing time (VMT) ENDOR method used here leads to a separation of ENDOR transitions originating from different electron spin manifolds by employing their dependence on the time-dependent parameters of the pulse sequence. The simple kinetic model of the RP VMT ENDOR experiment shows very good agreement with the experiments performed on the P70+oA] -RP in photosystem I. This method relies on the selective excitation of absorptive or emissive lines of one radical in the RP EPR spectrum and therefore requires high spectral resolution. This condition was fulfilled for the system studied at the low-field edge of the RP EPR spectrum obtained at Q-band. The method presented here has a very high sensitivity and does not require any equipment additional to the one used for RP pulse ENDOR. The VMT ENDOR method offers the possibility for selective suppression of signals from different electron spin manifolds.

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Section: Introductionmentioning

confidence: 99%

“…1) [15]. In the TRIPLE experiment one of the RF pulses excites the transition belonging to one nucleus while the frequency of the other RF pulse is swept.…”

Section: Introductionmentioning

confidence: 99%

Absolute signs of hyperfine coupling constants as determined by pulse ENDOR of polarized radical pairs

Epel¹,

Niklas²,

Antonkine

et al. 2006

Appl. Magn. Reson.

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show abstract

“…The pulse mode analog of the TRIPLE experiment, shown in Fig. 1a, was reported by Mehring and coworkers (26). The Mims-TRIPLE variant of the experiment has been applied at X-band for the assignment of exchangeable 2 H in [3Fe-4S] ϩ clusters (27).…”

Section: Introductionmentioning

confidence: 96%

Two-Dimensional Pulsed TRIPLE at 95 GHz

Epel

Goldfarb

2000

Journal of Magnetic Resonance

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“…The ability of the MW pulse to selectively invert EPR transitions enables the correlation between ESEEM lines arising from the weak hyperfine interaction and the ENDOR lines originating from the strong interaction. If the inversion MW pulse would be selective also with respect to the small coupling, for example inverting only the {͉␤␣␣͘ Ϫ ͉␣␣␣͘} EPR transition, then an experiment similar to TRIPLE (21,22), correlating ESEEM and ENDOR lines corresponding to the same M S manifold only, is obtained.…”

Section: Introductionmentioning

confidence: 99%