Slow turning reveals enormous quadrupolar interactions (STREAQI)

Persons, John; Harbison, Gerard S.

doi:10.1016/j.jmr.2007.03.002

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…2,7 Persons and Harbison demonstrated that limited spectrometer bandwidth could be overcome with slow sample spinning 2D SSNMR experiments that correlate the resonance frequency at different rotor phases and artificially enhance the excitation bandwidth. 8 They applied this method, which they named slow-turning reveals enormous anisotropic quadrupolar interactions (STREAQI), exclusively to quadrupolar nuclei. More recently, Bhattacharyya and Frydman demonstrated that frequencyswept wideband, uniform rate and smooth truncation (WURST) shaped pulses could be used to dramatically improve the bandwidth of static spin echo experiments.…”

Section: Introductionmentioning

confidence: 99%

Indirect detection of infinite-speed MAS solid-state NMR spectra

Perras

Venkatesh

Hanrahan

et al. 2017

Journal of Magnetic Resonance

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Heavy spin-1/2 nuclides are known to possess very large chemical shift anisotropies that can challenge even the most advanced magic-angle-spinning (MAS) techniques. Wide manifolds of overlapping spinning sidebands and insufficient excitation bandwidths often obfuscate meaningful spectral information and force the use of static, low-resolution solid-state (SS)NMR methods for the characterization of materials. To address these issues, we have merged fast-magic-angle-turning (MAT) and dipolar heteronuclear multiple-quantum coherence (D-HMQC) experiments to obtain D-HMQC-MAT pulse sequences which enable the rapid acquisition of 2D SSNMR spectra that correlate isotropic H chemical shifts to the indirectly detected isotropic "infinite-MAS" spectra of heavy spin-1/2 nuclides. For these nuclides, the combination of fast MAS andH detection provides a high sensitivity, which rivals the DNP-enhanced ultra-wideline SSNMR. The new pulse sequences were used to determine the Pt coordination environments in a complex mixture of decomposition products of transplatin and in a metal-organic framework with Pt ions coordinated to the linker ligands.

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Section: Introductionmentioning

confidence: 99%

Indirect detection of infinite-speed MAS solid-state NMR spectra

Perras

Venkatesh

Hanrahan

et al. 2017

Journal of Magnetic Resonance

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“…Hajjar et al investigated 71 Ga coordination environment in MIL-120 and MIL-124 through CT (central transition) MAS [30] NMR in conventional NMR probe [31]. In combination of the NMR simulation SIMPSON [32] and 2D slow-CTMAS results, EFG parameters of different crystallographic Ga sites are determined; there are two distinct Ga sites in MIL-120 and one in MIL-124 with remaining site undetectable due to fast molecular motion.…”

Section: Investigation Of Mof Structure By Ssnmrmentioning

confidence: 99%

Hierarchical Structure and Molecular Dynamics of Metal-Organic Framework as Characterized by Solid State NMR

Chen

2016

Journal of Chemistry

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Metal-organic framework (MOF) stands out as a promising material with great potential in application areas, such as gas separation and catalysis, due to its extraordinary properties. In order to fully characterize the structure of MOFs, especially those without single crystal, Solid State NMR (SSNMR) is an indispensable tool. As a complimentary analytical technique to X-ray diffraction, SSNMR could provide detailed atomic level structure information. Meanwhile, SSNMR can characterize molecular dynamics over a wide dynamics range. In this review, selected applications of SSNMR on various MOFs are summarized and discussed.

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