nuclear magnetic resonance
Let an agent explain nuclear magnetic resonance and its physics, relay spectroscopy, imaging and advanced techniques from physics and chemistry references, describe applications, and distinguish NMR from electron spin resonance and from MRI as an application.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain nuclear magnetic resonance and its physics, relay spectroscopy, imaging and advanced techniques from physics and chemistry references, describe applications, and distinguish NMR from electron spin resonance and from MRI as an application.
A physical phenomenon in which atomic nuclei with spin, placed in a strong magnetic field, absorb and re-emit electromagnetic radiation at a resonant frequency that depends on the nucleus and its chemical environment, discovered in 1938 and 1946, and exploited in NMR spectroscopy for determining molecular structure, in magnetic resonance imaging for medicine, in solid-state techniques such as cross-polarization, in double resonance methods such as electron nuclear double resonance, and in quantum computing; NMR is one of the most important analytical techniques in chemistry.
What it is for: Analysing structure and imaging through nuclear spins.
It can be explain the physics; relay spectroscopy and techniques; describe applications; distinguish from ESR and MRI.
Distinguishing features
Nuclear spin resonance
Chemical shift
Non-destructive
Broad applications
What it looks like
Not a visible object; spectra and images from superconducting magnet instruments.
Physical character
discovered: 1938 Rabi, 1946 Bloch and Purcell year
proton Larmor frequency at 1 T: about 42.58 MHz
high-field spectrometers: up to 1.2 GHz - proton frequency
How it is recognised
Resonant absorption by nuclear spins in a magnetic field
NMR spectroscopy, solid-state NMR, cross-polarization, ENDOR, MRI
Electron spin resonance uses electron spins; MRI is the imaging application
Related models
is a kind of - in registry terms, of radiofrequency radiation
underlies - in medicine
is applied in - for structure determination
is contrasted with - using electron spins
In practice
Families and kinds
solution NMR spectroscopy
solid-state NMR including magic angle spinning and cross-polarization
multidimensional NMR
double resonance techniques such as ENDOR
magnetic resonance imaging as an application
low-field and benchtop NMR
NMR in quantum information
Identifiers
MeSH D009682 magnetic resonance spectroscopy
Standards and regulation
IUPAC recommendations on NMR nomenclature and chemical shift referencing
Safety rules for superconducting magnets and cryogens
Failure modes and hazards
Magnet quench and cryogen hazards
Confusing NMR with ESR or with MRI
Misinterpreting spectra
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What NMR is.
Science.
Physics
Physics.
Physics
Physics.
- How do nuclear spins precess and resonate in a magnetic field, and what determines the resonance frequency? definition
- Is the question about NMR physics, spectroscopy, MRI or electron spin resonance? boundary
Parameters
Chemical shift and coupling.
Parameters
Parameters.
- What are chemical shift, spin-spin coupling and relaxation, and what do they reveal? definition
- Which entry fits chemical shift? action
Techniques Techniques.
Science.
Spectroscopy
Spectroscopy.
Spectroscopy
Spectroscopy.
- How do one- and multidimensional NMR experiments determine molecular structure? provenance
- Which references are standard? provenance
Solid
Solid-state and double resonance.
Solid
Solid.
- How do magic angle spinning, cross-polarization and ENDOR extend NMR to solids and radicals? provenance
- Which entry fits solid-state NMR? action
Apply Applications.
Application.
Chemistry
Chemistry and biology.
Chemistry
Chemistry.
- How is NMR used in chemistry, structural biology, metabolomics and materials? provenance
- Which sources are cited? provenance
Medicine
Medicine and beyond.
Medicine
Medicine.
- How does NMR underlie MRI and appear in oil exploration, food science and quantum computing? provenance
- Which entry fits magnetic resonance imaging? action
Context History and instruments.
Context.
History
History.
History
History.
- How did Rabi, Bloch, Purcell, Ernst and Wuthrich develop NMR, with Nobel recognition? provenance
- Which entry fits the history of NMR? action
Instruments
Instruments.
Instruments
Instruments.
- How do NMR spectrometers work, and what are the trends in field strength and benchtop instruments? provenance
- Which entry fits NMR spectrometer? action
What the second pass must settle
- Should NMR spectroscopy and solid-state NMR be separate primary entries?
- How should physics and chemistry references be linked?
- The registry entry has merged aliases naming techniques; should they be split off?