1. 1st and 2nd Ordered Zeeman
Effect in Magnetic Properties
of Coordination Chemistry
Presented by: Priya Vijay Chavan
Institution: AAC Manchar
Date: 25/03/2025
2. Introduction
• Magnetism plays a crucial role in coordination
chemistry.
• The Zeeman Effect helps in understanding the
behavior of electrons in a magnetic field.
• It is widely used in spectroscopy and materials
science.
• Understanding 1st and 2nd order Zeeman splitting
is key to interpreting experimental results.
3. Magnetic Properties in
Coordination Chemistry
• Types of Magnetic Behavior:
• - Diamagnetism: No unpaired electrons, weak
repulsion by magnetic fields.
- Paramagnetism: Unpaired electrons, attraction
to magnetic fields.
- Ferromagnetism: Strong collective magnetic
behavior.
• Ligands and crystal field influence magnetic
properties.
• Spin and orbital contributions determine total
magnetic moment.
4. Zeeman Effect – Definition &
Importance
• The Zeeman Effect is the splitting of spectral
lines under an applied magnetic field.
• Discovered by Pieter Zeeman, explaining energy
level modifications in a field.
• Essential in understanding transition metal
complexes and spin-orbit interactions.
5. The Zeeman effect is the splitting of the
spectral lines of an atom in the presence of a
strong magnetic field. The effect is due to the
distortion of the electron orbitals because of
the magnetic field The splitting of spectral lines
in magnetic field occurs due to Zeeman effect.
Actually this Zeeman effect is the energy shift
caused by a magnetic field which arises due to
the coupling of the electron orbital angular
momentum to the external magnetic field.
6. First-Order Zeeman Effect
• Occurs under weak magnetic fields.
• Energy splitting equation:
ΔE= μB * g * mJ * B,
Where:
-mJ= Magnetic quantum number
• - g = Landé g-factor
- μB= Bohr magneton
- B = Applied magnetic field strength.
• Results in uniform splitting of degenerate
energy levels.
7. Second-Order Zeeman Effect
• • Occurs under strong magnetic fields,
includes spin-orbit interactions.
• • Energy splitting follows:
• ΔE = (g²μ_B²B²) / ΔE_o
• Where:
• - ΔE_o = Zero-field energy splitting.
• • Leads to complex, nonlinear splitting.
9. Applications in Coordination
Chemistry
• Transition metal and lanthanide complexes exhibit
Zeeman splitting.
• Used in EPR, NMR, and other magnetic resonance
techniques.
• Quantum computing and molecular magnetism
applications.
• Astronomy and Astrophysics:
Used to measure the magnetic fields of stars and
planets by analyzing spectral line splitting.
