State, 119 cybotactic regions

A suitable probe for the general solvent effect must therefore be a polar compound. Around its dipole moment, the solvent molecules will arrange themselves as effectively as possible -in thermal equilibrium- and the interaction between the probe dipole and the solvent molecules that form the cybotactic region must be strongly altered by electronic excitation, which will result in an appropriate shift in charge the charge will then create a new dipole moment enclosed by the same cybotactic cavity as in the initial state of the transition. 

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