Auxochrome

⭐⭐⭐
masculine noun / adjective (organic chemistry / dyes)

Definition

A group of atoms (such as -OH, -NH2, -OCH3) attached to an organic molecule containing a chromophore group, whose role is to intensify, fix, or shift the color of that substance and to enable it to bond stably to textile or biological fibers.

Bilingual Equivalents

  • Auxochrome
  • Auxochromic group

Grammatical & Source Details

Inflection Type Masculine noun or variable adjective with standard masculine, feminine, and structural plural variations.
Formation Compound word combining the prefixoid 'auxo-' (increase) with the baseline chemical element '-chrome' (color).
Spelling / Pronunciation [ˈɔːk.sə.kroʊm]
Source Vogel's Textbook of Practical Organic Chemistry and Spectroscopic Nomenclature

Contextual Usage Examples

RO: Prezența unui auxocrom de tip amino determină o deplasare batocromă a spectrului de absorbție al moleculei.

EN: The presence of an amino-type auxochrome causes a bathochromic shift in the absorption spectrum of the molecule.

RO: Inginerul chimist a adăugat un auxocrom structurii moleculare pentru a asigura o aderență mai bună a vopselei pe bumbac.

EN: The chemical engineer added an auxochrome to the molecular structure to ensure better paint adhesion on cotton.

RO: Spre deosebire de cromofor, un auxocrom izolat nu poate produce culoarea, ci doar o modulează pe cea existentă.

EN: Unlike a chromophore, an isolated auxochrome cannot produce color; it merely modulates the existing one.

Idioms & Phrases

Grupă auxocromă / Auxochromic group

RO: Substituent funcțional cu electroni neparticipanți care interacționează cu sistemul conjugat al unui colorant.

EN: A functional substituent with lone pair electrons that interacts with the conjugated system of a dye.

Efect auxocrom / Auxochromic effect

RO: Modificare spectrală optic măsurabilă ce constă în intensificarea culorii și mărirea coeficientului de stingere.

EN: An optically measurable spectral change consisting of color intensification and an increase in the extinction coefficient.

Auxocrom acid / Acidic auxochrome

RO: Grupă chimică cu caracter acid (cum ar fi gruparea sulfonică sau carboxilică) capabilă să formeze săruri stabile.

EN: A chemical group with acidic character (such as a sulfonic or carboxylic group) capable of forming stable salts.

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