What is chromophore in organic chemistry?

chromophore, a group of atoms and electrons forming part of an organic molecule that causes it to be coloured. Deep coloration results if several chromophores are closely joined in the same molecule or if another group, called an auxochrome, is present.

What do Auxochromes do?

An auxochrome helps a dye to bind to the object that is to be colored. Electrolytic dissociation of the auxochrome group helps in binding and it is due to this reason a basic substance takes an acidic dye.

What is the meaning of chromophores?

Definition of chromophore : a chemical group (such as an azo group) that absorbs light at a specific frequency and so imparts color to a molecule also : a colored chemical compound. Other Words from chromophore Example Sentences Learn More About chromophore.

What are the types of chromophore?

Some of the important chromophores are: ethylene, acetylene, carbonyls, acids, esters and nitrile groups etc. A carbonyl group is an important chromophore, although the absorption of light by an isolated group does not give rise to any colour in the ultra-violet spectroscopy.

Is a chromophore a protein?

The protein molecule, with respect to its spectroscopic properties, may be considered as a complex system of chromophore groups which differ in structure and position of spectra. The protein absorption spectrum is at first approximation, the superposition of spectra of chromophores composing the protein molecule.

How is chromophore formed?

The process of chromophore formation in S65T-GFP was determined to be an ordered reaction consisting of three distinct kinetic steps. Since the chromophore forms de novo from purified denatured protein and is a first-order process, we conclude that GFP chromophore formation is an autocatalytic process.

What is chromophore Auxochrome?

Chromophore is that part of the molecule which when exposed to visible light will absorb and reflect a certain color. Auxochrome is a group of atoms which is functional and has the capability to alter the capacity of the chromophore to reflect colors. Azobenzene is an example of a dye which contains a chromophore.

What is independent chromophore?

1 Two types of chromophore a) Independent chromophore Any Functional group which is responsible for impairing colour to the compound is called as chromophore. Ex: NO2 Covalently unsaturated groups responsible for the impairing of the colures.

Is water a chromophore?

Perhaps the most dominant chromophore in biology which absorbs via vibrational transitions is water. In the infrared, the absorption of water is the strongest contributor to tissue absorption.

What is chromophore made of?

The chromophore itself is a p-hydroxybenzylidene-imidazolidone (green background). It consists of residues 65-67 (Ser – dehydroTyr – Gly) of the protein. The cyclized backbone of these residues forms the imidazolidone ring.

Do chromophores emit light?

Discovery of chromophores that emit light in the ultraviolet region when excited with visible light. Summary: Fluorescence usually entails the conversion of light at shorter wavelengths to light at longer wavelengths. Scientists have now discovered a chromophore system that goes the other way around.