Peak suppression in ESEEM spectra of multinuclear spin systems

Stoll, Stefan; Calle, Carlos I.; Mitrikas, George; Schweiger, Arthur

doi:10.1016/j.jmr.2005.07.012

Cited by 101 publications

(100 citation statements)

References 12 publications

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“…Due to suppression effects [73] associated to the deep modulation depth of the TiAlPO-5 case, where at least two 14 N nuclei are interacting with the unpaired electron, the proton signal shows a reduced intensity. The signal is shown in the inset of Fig.…”

Section: Top Catalmentioning

confidence: 99%

Rational Design of Engineered Multifunctional Heterogeneous Catalysts. The Role of Advanced EPR Techniques

et al. 2015

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The importance of surface paramagnetic species owes much to that of surface phenomena which are involved in numerous areas of chemistry and material science such as heterogeneous catalysis, photochemistry and, in general terms, nano-sciences and technology. In the present contribution the opportunities offered by the use of EPR in the field of heterogeneous catalysis, with emphasis on the application of hyperfine techniques, will be illustrated taking as an example Ti-based catalytic materials. The reductive activation of framework titanium ions in the different materials and their sub-sequent reactivity towards NH 3 is followed, highlighting subtle differences in chemical reactivity related to the different matrixes.

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Section: Top Catalmentioning

confidence: 99%

Rational Design of Engineered Multifunctional Heterogeneous Catalysts. The Role of Advanced EPR Techniques

et al. 2015

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“…Due to the cross-suppression effect, which hampers the determination of shallow modulation, the proton hyperfine couplings initially could not be detected at X-band [11,33,34]. Q-band Davies ENDOR experiments later allowed for the detection of the complete proton signals revealing the hyperfine couplings.…”

Section: Weakly Coupled Proton Nuclei Of Co-porphyrin Complexesmentioning

confidence: 99%

“…In addition, when going to higher excitation frequencies strong-level mixing is usually reduced, consequently, the ENDOR effect is enhanced and the ESEEM effect is reduced, i.e. the impacts of cross-suppression and implicit triple [10,11] are decreased. Compared to ENDOR at even higher frequencies, Q-band pulse ENDOR has substantially better concentration sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Cryogenic 35GHz pulse ENDOR probehead accommodating large sample sizes: Performance and applications

Tschaggelar

Kasumaj

Santangelo

et al. 2009

Journal of Magnetic Resonance

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“…Similar X-band CW EPR spectra are found for dioxygen adducts of Co II -Mb. [4] Pulse EPR spectroscopy: In order to minimize peak overlapping and cross suppression, [18] the following pulse EPR experiments were conducted at higher excitation frequencies (Q-band). First, field-swept FID-integral-detected EPR spectra were recorded to determine the magnetic field (observer) positions for the pulse EPR experiments.…”

Section: Synthesismentioning

confidence: 99%

Probing Hydrogen Bonding to Bound Dioxygen in Synthetic Models for Heme Proteins: The Importance of Precise Geometry

Dube

Kasumaj

Calle

et al. 2008

Chemistry A European J

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Distal hydrogen bonding in natural dioxygen binding proteins is crucial for the discrimination between different potential ligands such as O(2) or CO. In the present study, we probe the chemical requirements for proper distal hydrogen bonding in a series of synthetic model compounds for dioxygen-binding heme proteins. The model compounds 1-Co to 7-Co bear different distal residues. The hydrogen bonding in their corresponding dioxygen adducts is directly measured by pulse EPR spectroscopy. The geometrical requirements for this interaction to take place were found to be narrow and very specific. Only two model complexes, 1-Co and 7-Co, form a hydrogen bond to bound dioxygen, which was characterized in terms of geometry and nature of the bond. The geometry and dipolar nature of this interaction in 1-Co-O(2) is more similar to the one in natural cobalt myoglobin (Co-Mb), making 1-Co the best model compound in the entire series.

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Peak suppression in ESEEM spectra of multinuclear spin systems

Cited by 101 publications

References 12 publications

Rational Design of Engineered Multifunctional Heterogeneous Catalysts. The Role of Advanced EPR Techniques

Rational Design of Engineered Multifunctional Heterogeneous Catalysts. The Role of Advanced EPR Techniques

Cryogenic 35GHz pulse ENDOR probehead accommodating large sample sizes: Performance and applications

Probing Hydrogen Bonding to Bound Dioxygen in Synthetic Models for Heme Proteins: The Importance of Precise Geometry

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