It were studied for the solvatochromic behavior of various polar solvents using the Dimroth-Reichardt's Betaine ET-30 Dye. Polar solvent molecules selectively stabilize the electronic state having the larger dipole moment.
The transition energy incr...
It were studied for the solvatochromic behavior of various polar solvents using the Dimroth-Reichardt's Betaine ET-30 Dye. Polar solvent molecules selectively stabilize the electronic state having the larger dipole moment.
The transition energy increases with increasing solvent polarity and the absorption band maximum shifts to shorter wavelengths. In other words, the ground state dipolar moments for the dyes are greater than their excited state dipolar moments. As a consequence, the stabilization of the ground state in the dye by more polar solvents is greater then for the transition state, increasing the transition energies.
It can easily predict the contents of water in the organic solvents that using in the laboratory of school by calculation the Dimroth's E_(T) values.