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Electronically excited molecule possible fates

The possible fate of excitation energy residing in molecules is also shown in Figure 2. The relaxation of the electron to the initial ground state and accompanying emission of radiation results in the fluorescence spectrum - S0) or phosphorescence spectrum (Tx - S0). In addition to the radiative processes, non-radiative photophysical and photochemical processes can also occur. Internal conversion and intersystem crossing are the non-radiative photophysical processes between electronic states of the same spin multiplicity and different spin multiplicities respectively. [Pg.30]

The energy of an electronically excited state may be lost in a variety of ways. A radiative decay is a process in which a molecule discards its excitation energy as a photon. A more common fate is non-radiative decay, in which the excess energy is transferred into the vibration, rotation, and translation of the surrounding molecules. This thermal degradation converts the excitation energy into thermal motion of the environment (i.e., to heat). Two radiative processes are possible spontaneous emission, just like radioactivity, which is a completely random process where the excited state decays ... [Pg.20]


See other pages where Electronically excited molecule possible fates is mentioned: [Pg.55]    [Pg.107]    [Pg.18]    [Pg.388]    [Pg.287]    [Pg.4]    [Pg.19]    [Pg.53]    [Pg.43]    [Pg.312]    [Pg.236]    [Pg.15]    [Pg.330]    [Pg.270]    [Pg.330]    [Pg.665]   
See also in sourсe #XX -- [ Pg.50 , Pg.51 ]




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