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Intersystem crossing

 

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Intersystem crossing



 
 
Intersystem crossing is a photophysical process. An isoenergetic non-radiative transition between two electronic state
Electronic state

Electronic state






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Intersystem crossing is a photophysical process. An isoenergetic non-radiative transition between two electronic state
Electronic state

Electronic state is a quantum state of a system consisting of electrons . The state with lowest energy is called ground state, states with higher energy are excited states....
s having different multiplicities
Term symbol

In quantum mechanics, the term symbol is an abbreviated description of the angular momentum quantum numbers in a multi-electron atom. It is related with the energy level of a given electron configuration....
. It often results in a vibrationally excited molecular entity
Molecular entity

According to IUPAC Gold Book a molecular entity is any constitutionally or isotopically distinct atom, molecule, ion, ion pair, Radical , radical ion, complex, conformer, etc., identifiable as a separately distinguishable entity....
 in the lower electronic state, which then usually deactivates
Vibrational transition

A vibrational transition is an abrupt change in vibrational energy in quantum physics. Like all other properties of a quantum Elementary particle, vibrational energy is Quantization , meaning it can only equal certain discrete values, which correspond to different energy states....
 to its lowest vibrational level.