A chemical group or substituent in a dye molecule that causes a shift toward longer wavelengths (redder colors) when attached to a chromophore.
From Greek 'bathos' (depth) plus 'chroma' (color). This chemistry term refers to specific molecular components that alter light absorption properties.
Bathochromes are like molecular paint mixers—chemists can attach them to dye molecules to shift colors deeper into the red spectrum, which is why textile manufacturers can create endless color variations!
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