Polarization sudden

The sudden-polarization effect falls somewhat outside the scope of this chapter, since it is confined to electronically excited states. However, since it may have... 

When molecules are photoionized in a liquid, there is a lowering of the ionization threshold, Fth, due to both the sudden polarization of the liquid by the ion and Fq. Thus ... 

Sudden Polarization in Excited States of Symmetric Ethylenes... 

Kar et al. examined the properties of the sesquifulvalene molecule of Fig. 7. An interesting aspect is whether the molecule can change structure so that the two rings no longer are parallel but perpendicular. This phenomenon is called sudden polarization. One possibility could be to electronically excite the system. Therefore, Kar et al. calculated the relative total energy between the parallel and the perpendicular conformation in different excited states for the two different molecules of their study, both in the gas phase and in a solvent. We show their results in Table 37 for the two different donor-acceptor substituted molecules that they studied. It is interesting that the results depend very sensitive on the substitution. 

Moreover, in one case, the Si, state possesses a sudden polarization when being solvated in a solvent with a not too large dielectric constant. 

Sudden polarization, 272 a-Sulfonyl carbanion, 277-278 Sulfuric acid, 100 Suprafacial, 163... 

Separate optimization of the relevant function spaces zwitterionic excited states of polyenes and the sudden polarization effect... 

By the early 1980s, the quantitative understanding of the phenomenon sudden polarization in polyenes had attracted the interest of a few quanfum chemisfs, for example. Ref. [38-40]. Later and more recent works on the excited states of such systems can be found in Refs. [41 3]. 

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