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Chemical shift

In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is the resonant frequency of an atomic nucleus relative to a standard in a magnetic field. Often the position and number of chemical shifts are diagnostic of the structure of a molecule. Chemical shifts are also used to describe signals in other forms of spectroscopy such as…

Standards, Factors causing chemical shifts & Chemical shift referencing

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Overview

Operating frequency

Chemical shift referencing

The induced magnetic field

Factors causing chemical shifts

Magnetic properties of most common nuclei

Chemical shift manipulation

Other chemical shifts

Advanced semantic analysis

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Map overview Semantic statistics

Chemical shift

Nodes68
Edges67
Triples59
Avg. degree1.97
Density0.029412
Components1

How this topic connects Entity context

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Chemical shift

Top relations

has method · 14
Chemical shift → Both, External, If, In, Indirect, Internal, Magnetic, NMR, Practically, Problems, Similar, Substitution, The, With
related to The induced magnetic field · 10
Chemical shift → Bonding, Circular, Electron-donating, Lenz's, Not, Nuclei, The, This, Trends, When
related to Other chemical shifts · 9
Chemical shift → As, Chemical, Mössbauer, NMR, Shoolery's, The, The Knight, The NMR, X-ray
related to Chemical shift manipulation · 6
Chemical shift → In, J-coupling, MRI, NMR, Similarly, Using
related to External links · 5
Chemical shift → IR, NMR, Problem, Problems, TableProton
related to Factors causing chemical shifts · 4
Chemical shift → Electron, For, Important, NMR
related to Chemical shift referencing · 3
Chemical shift → B0, Chemical, Since
is a · 1
Chemical shift → resonant frequency of an atomic nucleus relative to a standard in a magnetic field

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Important terminology

chemical shift field magnetic nmr nucleus frequency reference resonance referencing also used nuclei shifts ppm sample electron external induced 1h

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Chemical shiftis aresonant frequency of an atomic nucleus relative to a standard in a magnetic field0.90text
photoemission spectroscopy.Some atomic nuclei possess a magnetic momentinstance ofChemical shifts are also used to describe signals in other forms of spectroscopy0.80text
nitro groups lead to deshielding of the nucleusinstance oflead to increased shielding whereas electron-withdrawing substituents0.80text
proteinsinstance ofwhich has a spin of 0 and therefore is NMR-inactive.15N because of being a key component of important biomolecules0.80text
DNA19F because of high relative sensitivity31P because of frequent occurrence in organic compoundsinstance ofwhich has a spin of 0 and therefore is NMR-inactive.15N because of being a key component of important biomolecules0.80text
moderate relative sensitivity Chemical shift manipulationIn generalinstance ofwhich has a spin of 0 and therefore is NMR-inactive.15N because of being a key component of important biomolecules0.80text
the associated increased signal-to-noiseinstance ofwhich has a spin of 0 and therefore is NMR-inactive.15N because of being a key component of important biomolecules0.80text
resolution has driven a move towards increasingly high field strengthsinstance ofwhich has a spin of 0 and therefore is NMR-inactive.15N because of being a key component of important biomolecules0.80text
Chemical shifthas methodPractically0.60section
Chemical shifthas methodNMR0.60section
Chemical shifthas methodIndirect0.60section
Chemical shifthas methodBoth0.60section

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