The (pronounced) change in position and sometimes intensity of an electronic absorption or emission band, accompanying a change in the polarity of the medium. Negative (positive) solvatochromism corresponds to a hypsochromic (bathochromic) shift with increasing solvent polarity. BUNCEL and RAJAGOPAL (1990); REICHARDT (1988). See also Dimroth-Reichardt ET parameter, Z-value.
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