Chemistry as a Prism: A Review of Light-Emitting Materials Having Tunable Emission Wavelengths

Photoluminescent materials have been extensively applied in various fields of science because of their numerous advantages, such as excellent sensitivity, good specificity, a large linear range of analysis, ease of handling, and so on. Many strategies have been used to understand and manipulate the photophysical properties of photoluminescent materials. This Focus Review describes recent progress focused on tuning the photophysical properties, especially the emission wavelengths of π‐conjugated oligomers, photoluminescent organometallic complexes, and fluorescent organic dyes by chemical modification. Lighten up! Photoluminescent materials have been extensively applied in various fields of science because of their attractive characteristics, such as excellent sensitivity, good specificity, a large linear range of analysis, ease of handling, and so on. In this article, we review recent progress in the tuning of the photophysical properties of fluorescent and phosphorescent materials, focusing especially on the tunability of their emission properties.