Improving the accuracy of pulsed field gradient NMR diffusion experiments: Correction for gradient non-uniformity

Connell, Mark A.; Bowyer, Paul J.; Bone, P. Adam; Davis, Adrian; Swanson, Alistair G.; Nilsson, Mathias; Morris, Gareth A.

doi:10.1016/j.jmr.2009.01.025

Cited by 119 publications

(129 citation statements)

References 41 publications

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“…38 Smoothed rectangle gradient pulse shapes were used throughout. The gradient strength was varied linearly from 2-95% of the probe's maximum value (calibrated at 50.2 G/cm) in 32 or 64 steps, with the gradient pulse duration and diffusion delay optimized to ensure a final attenuation of the signal in the final increment of less than 10 % relative to the first increment.…”

Section: Methodsmentioning

confidence: 99%

Fast and Tunable Synthesis of ZrO₂ Nanocrystals: Mechanistic Insights into Precursor Dependence

Keukeleere¹,

Roo

Lommens³

et al. 2015

Inorg. Chem.

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ABSTRACT:In this work, ZrO2 nanocrystals (NCs) are synthesized via a solvothermal treatment in benzyl alcohol, which is an established method for the synthesis of many metal oxide nanocrystals. We found that the use of microwave heating allows for a reduction in reaction time from 2 days in the autoclave to merely 4 hours in the microwave. Furthermore, we were able to tune the crystallographic phase from pure cubic to pure monoclinic zirconia by changing the reaction mechanism through the use of a different zirconium precursor. Via GC-MS measurements we found that the release of a strong acid during synthesis controls the key mechanism behind the control over crystal phase formation. The as-synthesized ZrO2 NCs (cubic or monoclinic) are small in size (3 -10 nm), yet aggregated. However, aggregrate-free NCs are generated through a surface-functionalization with carboxylic acid ligands, providing stabilization in apolar solvents via steric hindrance. Solution 1 H NMR was used to study the details of this post-modification step and the surface chemistry of the resulting aggregate-free NCs. This led to the conclusion that not only a different crystal structure but also a different surface chemistry is obtained depending on the precursor composition.

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Section: Methodsmentioning

confidence: 99%

Fast and Tunable Synthesis of ZrO₂ Nanocrystals: Mechanistic Insights into Precursor Dependence

Keukeleere¹,

Roo

Lommens³

et al. 2015

Inorg. Chem.

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“…Translational diffusion measurements experiments were performed with NMR using convection compensated sequences; either the standard Bruker double stimulated echo with bipolar gradients and Longitudinal Eddy current Delay (LED) [26] or a double stimulated echo with monopolar gradients with an extended phase cycle [27] . The diffusion encoding/decoding gradients were half sine bell shaped and were varied linearly between 2% and 95% of their maximum output over 32 increments.…”

Section: Methodsmentioning

confidence: 99%

The Solution Structure and Self‐Association Properties of the Cyclic Lipodepsipeptide Pseudodesmin A Support Its Pore‐Forming Potential

Sinnaeve

Hendrickx

hemel

et al. 2009

Chemistry A European J

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“…34 Diffusion measurements (2D DOSY) were performed using a double stimulated echo sequence for convection compensation and with monopolar gradient pulses; dstegp2s. 35 Smoothed rectangle gradient pulse shapes were used throughout. The gradient strength was varied linearly from 2-95% of the probe's maximum value (calibrated at 50.2 G/cm) in 64 steps, with the gradient pulse duration and diffusion delay optimized to ensure a final attenuation of the signal in the final increment of less than 10% relative to the first increment.…”

Section: Purificationmentioning

confidence: 99%

Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs

Meyns

Perálvarez

Heuer‐Jungemann

et al. 2016

ACS Appl. Mater. Interfaces

313

229

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Cesium lead halide (CsPbX 3 , X = Cl, Br, I) nanocrystals (NCs) offer exceptional optical properties for several potential applications but their implementation is hindered by a low chemical and structural stability and limited processability. In the present work, we developed a new method to efficiently coat CsPbX 3 NCs, which resulted in their increased chemical and optical stability as well as processability. The method is based on the incorporation of poly(maleic anhydride-alt-1-octadecene) (PMA) into the synthesis of the perovskite NCs. The presence of PMA in the ligand shell stabilizes the NCs by tightening the ligand binding, limiting in this way the NC surface interaction with the surrounding media. We further show that these NCs can be embedded in self-standing silicone/glass plates as down-conversion filters for the fabrication of monochromatic green and white light emitting diodes (LEDs) with narrow bandwidths and appealing color characteristics.

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Improving the accuracy of pulsed field gradient NMR diffusion experiments: Correction for gradient non-uniformity

Cited by 119 publications

References 41 publications

Fast and Tunable Synthesis of ZrO₂ Nanocrystals: Mechanistic Insights into Precursor Dependence

Fast and Tunable Synthesis of ZrO₂ Nanocrystals: Mechanistic Insights into Precursor Dependence

The Solution Structure and Self‐Association Properties of the Cyclic Lipodepsipeptide Pseudodesmin A Support Its Pore‐Forming Potential

Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs

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Improving the accuracy of pulsed field gradient NMR diffusion experiments: Correction for gradient non-uniformity

Cited by 119 publications

References 41 publications

Fast and Tunable Synthesis of ZrO2 Nanocrystals: Mechanistic Insights into Precursor Dependence

Fast and Tunable Synthesis of ZrO2 Nanocrystals: Mechanistic Insights into Precursor Dependence

The Solution Structure and Self‐Association Properties of the Cyclic Lipodepsipeptide Pseudodesmin A Support Its Pore‐Forming Potential

Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs

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Product

Resources

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Fast and Tunable Synthesis of ZrO₂ Nanocrystals: Mechanistic Insights into Precursor Dependence

Fast and Tunable Synthesis of ZrO₂ Nanocrystals: Mechanistic Insights into Precursor Dependence