What is an electron spin resonance?
Electron spin resonance (ESR) is a form of spectroscopy used on paramagnetic materials - materials that become magnetic when exposed to an external magnetic field. ESR is also referred to as electron paramagnetic resonance or EPR. The electron spiny resonance has a number of applications in chemistry and biology and even use in fields such as quantum calculation.
The electron carries a charge and rotation. Therefore, it causes a magnetic moment. If it is placed in an external magnetic field, the magnetic moment of the electrons will be in line with the magnetic field. It is also possible for the electron to equalize in the opposite direction of the magnetic field, but it requires more energy and it is not the natural state of the electron. This is a scientific basis for resonance of electron spin.
with ESR is applied to it with molecules that have extra or unpaired electrons, usually in the form of microwaves.Ergia by their magnetic moments will be the opposite of an externally applied magnetic field. The energy frequency absorbed electrons indicates the chemical structure of the molecule to which they are connected. In this way, electron spiny resonance can be used to determine the chemical composition of various materials.
It is important that the fabric has unpaired electrons. This is because paired electrons, according to the ruling principle, will have a rotation in the opposite directions, and therefore no pure magnetic moment. These materials are known as diamagnetic and are not suitable for ESR.
As with other resonance spectroscopic techniques, the electrons used in the resonance of electron spina must relax and return to their lower energy states. If not, all electrons will be excited and no other absorption will be possible. In this case will not measure anything, and as a result there will be no one withIgnál. Relaxation with rotation, where the electron gives energy to its surroundings, and relaxation spin-spin, where the electron gives energy to another electron, is two methods in which it can relax.
ESR is particularly suitable for detecting free radicals, which are a set of highly reactive molecules with non -correctional electrons. It is known that free radicals are the cause of several diseases, poisoning and even cancer. They also cause dental enamel disintegration at a known speed, which means that electron spiny resonance can be used to teeth and prolong people. Excess free radicals are also present in beer and wine, which are after their durability.
ESR is also a leading candidate in several top technologies. These include artificial photosynthesis and quantum calculations. In the latter fine fine -tuning ESR Work on one electrical group instead of a group of electrons, you can create a logical gate that corresponds to the energy states of the magnetic moment of electrons.