What is the difference between ESR and EPR?

Electron Spin Resonance (ESR), often called Electron Paramagnetic Resonance (EPR), is similar to Nuclear Magnetic Resonance (NMR), the fundamental difference being that ESR is concerned with the magnetically induced splitting of electronic spin states, while NMR describes the splitting of nuclear spin states.

What are the four elements of EPR?

EPR spectroscopy The instrument settings were: microwave power of 2 mW; modulation frequency of 100 kHz; modulation amplitude of 1.0 G; magnetic field scan of 100 G; sweep time of 168 s; and a detector time constant of 41 ms.

What is the reference used in EPR spectroscopy?

As previously mentioned an EPR spectrum is usually directly measured as the first derivative of the absorption. This is accomplished by using field modulation. A small additional oscillating magnetic field is applied to the external magnetic field at a typical frequency of 100 kHz.

What do you need to know about electron paramagnetic resonance?

This course manual will provide the reader with a basic understanding needed to be able to get useful information using the technique of electron paramagnetic resonance (EPR) spectroscopy. EPR spectroscopy is similar to any other technique that depends on the absorption of electromagnetic radiation.

Which is a spectroscopic technique for investigating paramagnetic compounds?

Electron Paramagnetic Resonance. Electron Paramagnetic Resonance (EPR), also known as electron spin resonance (ESR), is a spectroscopic technique used to investigate paramagnetic (unpaired electron) compounds.

Where does absorption occur in a paramagnetic resonance?

In conventional spectroscopy, ν is varied or swept and the frequencies at which absorption occurs correspond to the energy differences of the states. (We shall see later that EPR differs slightly.)

What makes an electron behave like a magnet?

EPR [ wiki ] is a magnetic resonance technique which detects the resonance transitions between energy states of unpaired electrons in an applied magnetic field. The electron has spin, which gives it a magnetic moment. The magnetic moment makes the electron behave like a tiny bar magnet.

What is the difference between ESR and EPR? Electron Spin Resonance (ESR), often called Electron Paramagnetic Resonance (EPR), is similar to Nuclear Magnetic Resonance (NMR), the fundamental difference being that ESR is concerned with the magnetically induced splitting of electronic spin states, while NMR describes the splitting of nuclear spin states. What are the four…