Chromophore

Chromophore can be defined as a chemical group capable of selective light absorption resulting in coloration of certain organic compounds. It can be defined as a chemical group capable of selective light absorption resulting in coloration of certain organic compounds.

A chromophore is a group of atoms within the molecule which are responsible for color of the molecule. It can be defined as any chemical residue which imparts some decided color to the compound of which it is an ingredient. Chromophores are found in a wide range of molecules, and can work in many different ways. A chromophore adds color to a molecule due to the nature of the atoms involved and the manner they are bonded with each other. It is the group of atoms in a molecule in which the electronic transition responsible for a given spectral band is located. The bonds among the atoms in a chromophore allow the atoms to absorb visible light while reflecting the other visible light, lending color to the molecule. The nature of the color may vary, depending on wavelengths absorbed and reflected and many other factors. Chromospheres are part of the molecule responsible for the color.  The color appears when the molecule absorbs wavelengths of visible light and transmits or reflects others. The chromospheres are the region in the molecule where the energy difference in between 2 different molecular orbitals falls within the range of visible spectrum. Visible light which hits the chromospheres can therefore be absorbed by exciting an electron from its ground state into the excited state. It is a chromophorous substance in which chemical group gives color to the molecule. It is a part of a molecular entity consisting of the atom or group of atoms in which the electronic transition is responsible for a given spectral band and is approximately. When compared with auxochrome a chromophore is the substructure on a molecule which is responsible for the absorption of light.