Shift of a spectral band to higher frequency or shorter
wavelength upon substitution or change in medium. It is informally referred to as
blue shift.
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1124
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2247