- 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
This brings selenophene more akin to pyrrole than thiophene, but the group -NH- in the molecule of pyrrole is an auxochrome.
The selenium atom in a cyclic compound also acts like an auxochrome.
While phenyldisulphide is colorless, when an auxochrome group is added, such as NH2, the compound is colored.
In other words, an auxochrome in addition to the chromophore group transforms a colorless chromogen into a colored one.
- 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