any radical or group of atoms that intensifies the color of a substance.
Origin of auxochrome
Related formsaux·o·chrom·ic, adjective
First recorded in 1890–95; auxo-
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for auxochrome
Historical Examples of auxochrome
The selenium atom in a cyclic compound also acts like an auxochrome.
This brings selenophene more akin to pyrrole than thiophene, but the group -NH- in the molecule of pyrrole is an auxochrome.
In other words, an auxochrome in addition to the chromophore group transforms a colorless chromogen into a colored one.
While phenyldisulphide is colorless, when an auxochrome group is added, such as NH2, the compound is colored.
British Dictionary definitions for auxochrome
a group of atoms that can be attached to a chromogen to convert it into a dye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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