An auxochrome is a functional group attached to a chromophore that modifies the ability of the chromophore to absorb light, often enhancing the color intensity and shifting the absorption wavelength. Auxochromes typically contain lone pairs of electrons, such as hydroxyl or amino groups, which can interact with the chromophore's π-electron system to alter electronic transitions.

Auxochrome

auxochrome

A functional group is a specific group of atoms within a molecule that is responsible for a characteristic set of chemical reactions. These groups play a crucial role in determining the properties and reactivity of organic compounds, making them fundamental to organic chemistry and molecular biology.

functional group

A chromophore is a part of a molecule responsible for its color, as it absorbs certain wavelengths of light and reflects others. It plays a crucial role in the fields of chemistry and biology, particularly in the study of pigments and the mechanisms of vision and photosynthesis.

chromophore

absorb light

Color intensity refers to the strength or vividness of a color, often determined by the concentration of pigments or the saturation level. It plays a crucial role in various fields such as art, design, and optics, affecting perception and emotional response.

color intensity

absorption wavelength

lone pairs of electrons

Hydroxyl groups are functional groups consisting of an oxygen atom bonded to a hydrogen atom, which are commonly found in alcohols and phenols. They play a crucial role in the chemical properties and reactivity of molecules, including their solubility in water and ability to form hydrogen bonds.

Hydroxyl Groups

amino groups

Π-electron system

Electronic transitions involve the movement of electrons between different energy levels within an atom or molecule, typically induced by the absorption or emission of photons. These transitions are fundamental to understanding phenomena such as spectroscopy, chemical reactivity, and the electronic properties of materials.

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