New methods for the acquisition of ultra-wideline solid-state NMR spectra of spin-1/2 nuclides

MacGregor, Alan W.; O’Dell, Luke A.; Schurko, Robert W.

doi:10.1016/j.jmr.2010.10.011

Cited by 111 publications

(85 citation statements)

References 99 publications

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“…For the specific conditions of solid-state NMR and experiments in oriented systems, specific pulse sequences have been optimized [390][391][392][393][394][395][396]. In ESR spectroscopy, the first broadband optimal-control pulses have recently been developed and experimentally implemented [108,288].…”

Section: State Of the Artmentioning

confidence: 99%

Training Schrödinger’s cat: quantum optimal control

et al. 2015

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Abstract. It is control that turns scientific knowledge into useful technology: in physics and engineering it provides a systematic way for driving a dynamical system from a given initial state into a desired target state with minimized expenditure of energy and resources. As one of the cornerstones for enabling quantum technologies, optimal quantum control keeps evolving and expanding into areas as diverse as quantumenhanced sensing, manipulation of single spins, photons, or atoms, optical spectroscopy, photochemistry, magnetic resonance (spectroscopy as well as medical imaging), quantum information processing and quantum simulation. In this communication, state-of-the-art quantum control techniques are reviewed and put into perspective by a consortium of experts in optimal control theory and applications to spectroscopy, imaging, as well as quantum dynamics of closed and open systems. We address key challenges and sketch a roadmap for future developments. ForewordThe authors of this paper represent the QUAINT consortium, a European Coordination Action on Optimal Control of Quantum Systems, funded by the European Commission Framework Programme 7, Future Emerging Technologies FET-OPEN programme and the Virtual Facility for Quantum Control (VF-QC). This consortium has considerable expertise in optimal control theory and its applications to quantum systems, both in existing areas, such as spectroscopy and imaging, and in emerging quantum technologies, such as quantum information processing, quantum communication, quantum simulation a e-mail: fwm@lusi.uni-sb.de and quantum sensing. The list of challenges for quantum control has been gathered by a broad poll of leading researchers across the communities of general and mathematical control theory, atomic, molecular-, and chemical physics, electron and nuclear magnetic resonance spectroscopy, as well as medical imaging, quantum information, communication and simulation. 144 experts in these fields have provided feedback and specific input on the state of the art, mid-term and long-term goals. Those have been summarized in this document, which can be viewed as a perspectives paper, providing a roadmap for the future development of quantum control. Because such an endeavour can hardly ever be complete (there are many additional areas of quantum control applications, such as spintronics, nano-optomechanical technologies etc.), this roadmap

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Section: State Of the Artmentioning

confidence: 99%

Training Schrödinger’s cat: quantum optimal control

et al. 2015

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“…In that case, MAS powder spectra feature numerous spinning sidebands. Such wide spectra are encountered when: (i) the nuclei are close either to unpaired electrons in paramagnetic samples [2][3][4][5][6][7][8][9][10][11][12] or to conduction electrons in electrical conductors, (ii) the nuclei are subject to large quadrupole interactions (I > 1/2) [13][14][15][16][17][18][19][20][21][22][23][24][25], or (iii) their chemical shift anisotropy (CSA) is large, particularly when the static magnetic field is high [26,27].…”

Section: Introductionmentioning

confidence: 99%

“…Wide spectra can be excited uniformly by short pulses, however at the expanse of a decrease in sensitivity [5]. Adiabatic pulses with controlled modulation of rf field amplitude and carrier frequency have been demonstrated to increase the bandwidth of both excitation and inversion pulses in Carr-Purcell-Meiboom-Gill (CPMG) sequence under static conditions [18,19,27]. Under MAS, adiabatic pulses have been employed for broadband inversion [6][7][8], but they require strong rf-amplitudes and they have not yet been demonstrated for broadband excitation or refocusing.…”

Section: Introductionmentioning

confidence: 99%

Broadband excitation in solid-state NMR using interleaved DANTE pulse trains with N pulses per rotor period

Trébosc

Lafon

et al. 2013

Journal of Magnetic Resonance

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N Broadband excitation DANTE MAS Paramagnetic samples a b s t r a c tWe analyze the direct excitation of wide one-dimensional spectra of nuclei with spin I = 1/2 or 1 in rotating solids submitted to pulse trains in the manner of Delays Alternating with Nutations for Tailored Excitation (DANTE), either with one short rotor-synchronized pulse of duration s p in each of K rotor periods For nuclei with I = 1 (e.g., for 14 N), the response to basic D K 1 pulse train is moreover affected by inhomogeneous decay due to 2nd-order quadrupole interactions, since these are not of rank 2 and therefore cannot be eliminated by spinning about the magic angle. For large quadrupole interactions, the signal decay produced by second-order quadrupole interaction can be minimized by (i) reducing the length of D K N pulse trains using N > 1, (ii) fast spinning, (iii) large rf-field, and (iv) using high magnetic fields to reduce the 2nd-order quadrupole interaction.

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“…In static samples, perhaps the most successful approaches use (WURST) refocusing pulses [26] in combination with Car-Purcell Meiboom-Gill (CPMG) schemes for spins I = 1/2, and with quadrupolar QCPMG schemes for spins I > 1/2 [27][28]. In samples spinning at the magic angle as well as for static samples, adiabatic pulses such as SHAP [25] and S 3 AP [29] schemes have been proposed to achieve broadband inversion.…”

Section: Introductionmentioning

confidence: 99%

Broadband excitation in solid-state NMR of paramagnetic samples using Delays Alternating with Nutation for Tailored Excitation (‘Para-DANTE’)

Carnevale

Vitzthum

Lafon

et al. 2012

Chemical Physics Letters

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a b s t r a c tThis Letter shows that interleaved sequences of short pulses in the manner of 'Delays Alternating with Nutation for Tailored Excitation' (DANTE) with N = 1, 2, 3 . . . equidistant pulses per rotor period extending over K rotor periods can be used to excite, invert or refocus a large number of spinning sidebands of spin-1/2 nuclei in paramagnetic samples where hyperfine couplings lead to very broad spectra that extend over more than 1 MHz. The breadth of the response is maintained for rf-field amplitudes as low as 30 kHz since it results from cumulative effects of individual pulses with very short durations.

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New methods for the acquisition of ultra-wideline solid-state NMR spectra of spin-1/2 nuclides

Cited by 111 publications

References 99 publications

Training Schrödinger’s cat: quantum optimal control

Training Schrödinger’s cat: quantum optimal control

Broadband excitation in solid-state NMR using interleaved DANTE pulse trains with N pulses per rotor period

Broadband excitation in solid-state NMR of paramagnetic samples using Delays Alternating with Nutation for Tailored Excitation (‘Para-DANTE’)

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