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Title: Physical Chemistry Notes - NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and Larmor Frequency.
Description: These are physical chemistry notes from 3rd year university study of Chemistry. This is an introduction: topics discussed are Physical NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and Larmor Frequency. Background information on the basics of NMR - no spin, half integer or integer spin, magnetic splitting - discussing cause of up and down spin.
Description: These are physical chemistry notes from 3rd year university study of Chemistry. This is an introduction: topics discussed are Physical NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and Larmor Frequency. Background information on the basics of NMR - no spin, half integer or integer spin, magnetic splitting - discussing cause of up and down spin.
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Physical Chemistry Notes - NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and
Larmor Frequency
...
In many atoms e
...
12C these are paired and opposing and
nucleus has no overall spin
...
)
If nN and np are both odd, nucleus has integer spin (1, 2, 3
...
In the absence of a magnetic field, these have equal
energy
...
According to Boltzman
distribution, lower state will have a greater population
...
626x10-34 m2 kg/s
For proton = 2
...
82x10-26 J (corresponding to a
frequency of 43 MHz)
...
Resonant Frequency
- Since ΔE =
,v=
Spin of nucleus can be reversed by absorption or emission at this frequency
...
- This disturbance can consist of a continuous wave (cw) of radio frequency energy or sudden
pulse of radio frequency across field lines
...
Larmour Frequency
of precessing nucleus occurs at exactly the same frequency as that corresponding to energy
difference, ΔE - the process of nuclear precession that couples radio frequency energy to the
spin energy states
...
In 1951 NMR experiment was shown to yield useful
information
...
Title: Physical Chemistry Notes - NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and Larmor Frequency.
Description: These are physical chemistry notes from 3rd year university study of Chemistry. This is an introduction: topics discussed are Physical NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and Larmor Frequency. Background information on the basics of NMR - no spin, half integer or integer spin, magnetic splitting - discussing cause of up and down spin.
Description: These are physical chemistry notes from 3rd year university study of Chemistry. This is an introduction: topics discussed are Physical NMR, Magnetic Splitting, Energy Levels, Resonant Frequency and Larmor Frequency. Background information on the basics of NMR - no spin, half integer or integer spin, magnetic splitting - discussing cause of up and down spin.