Optical detection of NMR in organic fluids

Meriles, Carlos A.

doi:10.1002/cmr.a.20107

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…31 The latter proves that this approach is well suited to be combined with top-down lithographic approaches to position individual molecules over large surface areas and may be of interest in the development of certain optical approaches to detect magnetic resonances on the nanoscale. 32,33 Nevertheless, the use of an electrically insulating layer (made up of alkanethiols) makes it impossible to use an STM tunneling current set point higher than 30 pA. 34 This is not suitable for the application that we seek to fulfill in this work and for the broader scope of our research efforts.…”

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confidence: 99%

Imaging Single Spin Probes Embedded in a Conductive Diamagnetic Layer

Messina

Fradin

2009

Langmuir

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The detection of spin noise by means of scanning tunneling microscopy (STM) has recently been substantially improved by the work presented by Komeda and Manassen (Komeda, T.; Manassen, Y. Appl. Phys. Lett. 2008, 92, 212506). The application of this technique to molecular paramagnets requires the positioning and anchoring of paramagnetic molecules at surfaces. It also requires the possibility of tunneling high current densities into the STM-molecule-substrate tunneling junction. In this letter, we exploit the self-assembly of 1,10-phenantroline on the Au(111) surface to form a diamagnetic matrix that hosts individual molecules and dimers of diphenyl-2-picryl-hydrazyl (DPPH). STM measurements are used to characterize the molecular layer. Electron spin resonance (ESR) measurements elucidate the role of thermal annealing in the preservation of the paramagnetic nature of the DPPH molecules.

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confidence: 99%

Imaging Single Spin Probes Embedded in a Conductive Diamagnetic Layer

Messina

Fradin

2009

Langmuir

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“…Nonetheless, dipolar and residual "contact" terms amount to a nonvanishing electron-nuclear coupling, formally represented through the hyperfine Hamiltonian H hf . 9 Following a reasoning similar to that of formulas ͑2͒ and ͑3͒, one can write the change of the molecular susceptibility due to the nuclear magnetization as 10 ⌬␣ yz…”

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confidence: 99%

Time-resolved, optically detected NMR of fluids at high magnetic field

Pagliero

Dong

Sakellariou

et al. 2010

The Journal of Chemical Physics

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We report on the use of optical Faraday rotation to monitor the nuclear-spin signal in a set of model (19)F- and (1)H-rich fluids. Our approach integrates optical detection with high-field, pulsed NMR so as to record the time-resolved evolution of nuclear-spins after rf excitation. Comparison of chemical-shift-resolved resonances allows us to set order-of-magnitude constrains on the relative amplitudes of hyperfine coupling constants for different bonding geometries. When evaluated against coil induction, the present detection modality suffers from poorer sensitivity, but improvement could be attained via multipass schemes. Because illumination is off-resonant i.e., the medium is optically transparent, this methodology could find extensions in a broad class of fluids and soft condensed matter systems.

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New Nuclear‐Spin‐Induced Cotton–Mouton Effect in Fluids at High DC Magnetic Field

Yao¹,

He²,

Chen³

et al. 2012

ChemPhysChem

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Based on Buckingham and Pople's theory of magnetic double refraction, a theoretical expression is derived for a new Cotton-Mouton effect φ(C-M)((IB)) in liquid induced by the crossed effect between the high dc magnetic field B(0) and the nuclear magnetic moment m(z)((l)). It contains temperature-independent and -dependent parts. The latter is proportional to the product between anisotropy of polarizability and the nuclear magnetic shielding tensor. For this new effect φ(C-M)((IB)), its order in magnitude for a molecule with large polarizability anisotropy is estimated to be comparable to the nuclear-spin-induced optical Faraday rotation (NSOFR). In the multipass approach, φ(C-M)((IB)) can be eliminated by time-reversal symmetry arguments, but NSOFR is enhanced.

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Optical detection of NMR in organic fluids

Cited by 4 publications

References 21 publications

Imaging Single Spin Probes Embedded in a Conductive Diamagnetic Layer

Imaging Single Spin Probes Embedded in a Conductive Diamagnetic Layer

Time-resolved, optically detected NMR of fluids at high magnetic field

New Nuclear‐Spin‐Induced Cotton–Mouton Effect in Fluids at High DC Magnetic Field

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