Publications de Angel Joaquin Perez Linde

Rotation-induced recovery and bleaching in magnetic resonance

Geoffrey Bodenhausen, Diego Carnevale, Angel Joaquin Perez Linde, Srinivas Chinthalapalli

Thurber and Tycko recently described a 'bleaching effect' that occurs in magnetic resonance when solid samples that are doped with paramagnetic agents are subjected to rotation by magic angle spinning (MAS) in a static magnetic field with a rotation period ...

Royal Society of Chemistry2015

Insights into the Catalytic Activity of Nitridated Fibrous Silica (KCC-1) Nanocatalysts from N-15 and Si-29 NMR Spectroscopy Enhanced by Dynamic Nuclear Polarization

Geoffrey Bodenhausen, Diego Carnevale, Angel Joaquin Perez Linde

Fibrous nanosilica (KCC-1) oxynitrides are promising solid-base catalysts. Paradoxically, when their nitrogen content increases, their catalytic activity decreases. This counterintuitive observation is explained here for the first time using N-15-solid-sta ...

Wiley-Blackwell2015

Cross polarization from H-1 to quadrupolar Li-6 nuclei for dissolution DNP

Geoffrey Bodenhausen, Aurélien Bornet, Sami Jannin, Jonas Milani, Basile Vuichoud, Angel Joaquin Perez Linde

Cross polarization from protons to quadrupolar Li-6 nuclei is combined with dynamic nuclear polarization of protons at 1.2 K and 6.7 T using TEMPOL as a polarizing agent followed by rapid dissolution. Compared to direct Li-6 DNP without cross-polarization, ...

Royal Society of Chemistry2014

Microwave frequency modulation to enhance Dissolution Dynamic Nuclear Polarization Dedicated to To Martial Rey, as a token of appreciation

Geoffrey Bodenhausen, Aurélien Bornet, Sami Jannin, Jonas Milani, Basile Vuichoud, Angel Joaquin Perez Linde

Hyperpolarization by Dissolution Dynamic Nuclear Polarization is usually achieved by monochromatic microwave irradiation of the ESR spectrum of free radicals embedded in glasses at 1.2 K and 3.35 T. Hovav et al. (2014) have recently shown that by using fre ...

Elsevier2014

Boosting Dissolution Dynamic Nuclear Polarization by Cross Polarization

Geoffrey Bodenhausen, Aurélien Bornet, Sami Jannin, Angel Joaquin Perez Linde

The efficiency of dissolution dynamic nuclear polarization can be boosted by Hartmann-Hahn cross polarization at temperatures near 1.2 K. This enables high throughput of hyperpolarized solutions with substantial gains in buildup times and polarization leve ...

Amer Chemical Soc2013

Solid-state proton NMR of paramagnetic metal complexes: DANTE spin echoes for selective excitation in inhomogeneously broadened lines

Geoffrey Bodenhausen, Diego Carnevale, Gerald Bauer, Angel Joaquin Perez Linde

The paramagnetic complex bis(oxazolinylphenyl)amine-Fe(III)Cl-2 is investigated by means of solid-state proton NMR at 18.8 T (800 MHz) using magic-angle spinning at 65 kHz. Spin echoes that are excited and refocused by combs of rotor-synchronized pulses in ...

Elsevier2013

Dynamic Nuclear Polarization and Other Magnetic Ideas at EPFL

Geoffrey Bodenhausen, Aurélien Bornet, Pascal Miéville, Sami Jannin, Jonas Milani, Diego Carnevale, Simone Ulzega, Marc Anthony Caporini, Nicola Salvi, Daniele Mammoli

Although nuclear magnetic resonance (NMR) can provide a wealth of information, it often suffers from a lack of sensitivity. Dynamic Nuclear Polarization (DNP) provides a way to increase the polarization and hence the signal intensities in NMR spectra by tr ...

2012