Jahutustakistuse

Jahutustakistuse, also known as the Jahn-Teller effect, is a phenomenon in quantum mechanics that describes the distortion of the geometry of a molecule or ion due to the interaction between degenerate electronic states and the vibrational modes of the molecule. This effect was first described by Hermann Arthur Jahn and Edward Teller in 1937. It is particularly relevant in the study of transition metal complexes and other systems with degenerate electronic states.

The Jahn-Teller effect occurs when a molecule or ion has a non-linear geometry and its electronic ground state is degenerate. The degeneracy can be lifted by a small distortion of the molecular geometry, leading to a lowering of the overall energy of the system. This distortion can result in a change in the bond lengths and angles of the molecule, leading to a Jahn-Teller distorted structure.

The Jahn-Teller effect can be classified into two types: the static Jahn-Teller effect and the dynamic Jahn-Teller effect. In the static Jahn-Teller effect, the molecule remains in a single distorted geometry, while in the dynamic Jahn-Teller effect, the molecule rapidly interconverts between different distorted geometries.

The Jahn-Teller effect has important implications in various fields, including chemistry, physics, and materials science. It can influence the reactivity and stability of molecules, as well as the electronic and optical properties of materials. Understanding the Jahn-Teller effect is crucial for the design and development of new materials with desired properties.