Term: solvatochromism
https://doi.org/10.1351/goldbook.S05749

Definition:
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.

Related Terms:
1) dimroth–reichardt <em>e</em><sub>t</sub> parameter (http://doi.org/10.1351/goldbook.D01746).
2) <em>z</em>-value (http://doi.org/10.1351/goldbook.Z06737).
3) polarity (http://doi.org/10.1351/goldbook.P04710).
4) hypsochromic (http://doi.org/10.1351/goldbook.H02929).
5) bathochromic (http://doi.org/10.1351/goldbook.B00618).

Source: PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1164 (https://doi.org/10.1351/pac199466051077)

Citation: 'solvatochromism' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05749

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