Any chemical group which, aside from its chemical action, imparts a color to the compounds of which it is a constituent.
the chemical group that gives color to a molecule
a molecule that will absorb light in a relatively narrow bandwidth, such as melanin and hemoglobin
a region in a molecule where the energy difference between two different molecular orbitals falls within the range of the visible spectrum
an atom, ion or molecule that absorbs radiation. May refer to a particular part or functional group of a molecule (for example, the carbonyl group or halogen atom).
A term used to describe a molecule that appears to be colored because it absorbs light in the visible region.
The light absorbing part of a photopigment. The photopigments contained in photoreceptors consist of two components: an opsin bound to a chromophore. The chromophore in human (and all mammalian) photopigments is retinal (a form of vitamin A). Upon absorbing a photon, retinal changes its conformation which results in its separation from the opsin group. This chemical change initiates the visual response. The differences in spectral sensitivity among the photopigments found in the different types of human photoreceptors are due to differences in their opsins.
a chemical group that absorbs light of characteristic wavelengths.
The substructure that is responsible for the spectral selective absorption of electromagnetic radiation.
Coloring agents can be very powerful. 1 atom in 10,000 atoms of clear glass may be enough to produce the illusion that the glass is blue. This grouping is called a “chromophore.
A molecule capable of absorbing light, mainly in the visible or UV range.
A chromophore is part (or moiety) of a molecule responsible for its color.
