auxochrome


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Related to auxochrome: chromophore, Bathochromic shift

auxochrome

[′ȯk·sə‚krōm]
(chemistry)
Any substituent group such as ‒NH2 and ‒OH which, by affecting the spectral regions of strong absorption in chromophores, enhance the ability of the chromogen to act as a dye.
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References in periodicals archive ?
All these have part of phenols and naphthols having hydroxyl group as auxochrome group.
This method is based on the observation that the Coomassie Brilliant Blue G-250 exists in two different color forms, red (365 nm) and blue(595 nm) the red form is converted to blue form upon binding of the dye to the auxochrome group -N[H.
The poor nuclear/ cytoplasmic differentiation seen in the use of unmordified Roselle extract and eosin as compared to haematoxylin and eosin may highlight the need for an auxochrome which stabilizes a staining reaction as obtained in the haematoxylineosin method.