The (pronounced) change in position and sometimes intensity of an electronic absorption or emission band, accompanying a change in the @P04710@ of the medium. Negative (positive) solvatochromism corresponds to a @H02929@ (@B00618@) shift with increasing solvent @P04710@.
See also:
Dimroth–Reichardt ET parameter
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1164 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2274 [Terms] [Paper]