Nuclear Magnetic Resonance (NMR) Spectroscopy

These flashcards cover key concepts and vocabulary related to Nuclear Magnetic Resonance (NMR) Spectroscopy as discussed in the lecture notes.

Nuclear Magnetic Resonance (NMR)

A spectroscopy technique to observe local magnetic fields around atomic nuclei.

Quantum Numbers

Numbers that describe the properties of electrons in atomic orbitals.

Spin Angular Momentum

An intrinsic property of particles that contributes to their total angular momentum.

Nuclear Magnetic Moment

The magnetic moment associated with the nucleus of an atom.

Zeeman Interaction

The interaction of magnetic moments with an external magnetic field.

Boltzmann Distribution

The distribution of particles over energy states in thermal equilibrium.

Free Induction Decay (FID)

The signal detected in NMR that represents the decay of magnetization after the excitation pulse.

Spin-Lattice Relaxation

The process by which energy is exchanged between spins and their surroundings.

Spin-Spin Relaxation

Loss of coherence among spins due to interactions between them.

Chemical Shift

The change in resonance frequency of nuclei in different chemical environments.

Induction Effect

Effect due to electronegative atoms attracting electrons, affecting chemical shifts.

Magnetic Anisotropy

Variations in magnetic properties depending on the orientation of molecules.

Coupling in NMR

The interaction between nuclear spins that affects the observed spectral patterns.

Nuclear Overhauser Effect (NOE)

Alteration in the intensity of a signal due to the influence of neighboring spins.

DEPT (Distortionless Enhancement by Polarization Transfer)

A type of NMR experiment that determines the number of hydrogen atoms attached to carbon.

COSY (COrrelation SpectroscopY)

An NMR experiment that correlates signals of the same type of nuclei.

HETCOR (HETeronuclear CORrelation)

An NMR technique correlating signals from different types of nuclei.

Titration Curve

Graph showing the relationship between pH and concentration during an acid-base titration.

Solid State NMR

NMR technique applied to solid samples for studying molecular structures.

EPR (Electron Paramagnetic Resonance)

Spectroscopy method for studying materials with unpaired electrons.

ZULF NMR

A type of NMR that allows detection of magnetic moments in a low-frequency range.