- any radical or group of atoms that intensifies the color of a substance.
Origin of auxochrome
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for 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.
- 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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012