What does chromophore mean in medical terms?
Feb 22, 2020 · 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. Popular Trending
What are the types of chromophores?
chromophore, a group of atoms and electrons forming part of an organic molecule that causes it to be coloured. Correlations between the structural features of chemical compounds and their colours have been sought since about 1870, when it was noted that quinones and aromatic azo and nitro compounds often are highly coloured and that the colours are diminished or …
Why nitro group is a chromophore?
chro·mo·phore (krō'mō-fōr), 1. The atomic grouping on which the color of a substance depends. 2. A target tissue for laser light therapy; absorption wavelength of tissue determines choice of laser wavelength. Common dermal chromophores include hemoglobin, oxyhemoglobin, collagen, beta-carotene, and melanin.
What is the meaning of chromophoric radical?
chromophore - the chemical group that gives color to a molecule chemical group , radical , group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule dye , dyestuff - a usually soluble substance for staining or coloring e.g. fabrics or hair
Which group is an example of chromophores?
Four of the important chromophores are: ethylene, acetylene, carbonyls, acids, esters and nitrile groups etc.
What is a chromophore for dummies?
A chromophore is the section of a molecule that causes us to see color. The chromophore portion of the molecule will have alternating double bonds, or conjugated double bonds. For example, beta-carotene, the molecule responsible for the color in carrots, has many double bonds.Nov 6, 2017
How do you identify chromophores?
Identification of chromophores: 1. Spectrum having a band near 300 mµ may possess two or three conjugated units. 2. Absorption bands near 270-350 mµ with very low intensity ɛmax 10-100 are because of n-π* transitions of carbonyl group.Oct 19, 2016
What are chromophores in the skin?
In the visible range, the main chromophores of human skin are hemoglobin and melanin. Hemoglobin is found in the microvascular network of the dermis, typically 50–500 μm below the skin surface. In contrast, melanin is located in the epidermis, which occupies the top 50–100 μm.
Overview
A chromophore is the part of a molecule responsible for its color. The color that is seen by our eyes is the one not absorbed by the reflecting object within a certain wavelength spectrum of visible light. The chromophore is a region in the molecule where the energy difference between two separate molecular orbitalsfalls within the range of the visible spectrum. Visible light that hits the chromo…
Conjugated pi-bond system chromophores
Just like how two adjacent p-orbitals in a molecule will form a pi-bond, three or more adjacent p-orbitals in a molecule can form a conjugated pi-system. In a conjugated pi-system, electrons are able to capture certain photons as the electrons resonate along a certain distance of p-orbitals - similar to how a radio antennadetects photons along its length. Typically, the more conjugated (long…
Auxochrome
An auxochrome is a functional group of atoms attached to the chromophore which modifies the ability of the chromophore to absorb light, altering the wavelength or intensity of the absorption.
Halochromism
Halochromism occurs when a substance changes color as the pH changes. This is a property of pH indicators, whose molecular structure changes upon certain changes in the surrounding pH. This change in structure affects a chromophore in the pH indicator molecule. For example, phenolphthalein is a pH indicator whose structure changes as pH changes as shown in the following table:
See also
• Visual phototransduction
• Woodward's rules
• Chromatophore
• Pigment
• Photophore, glandular organ
External links
• Causes of Color: physical mechanisms by which color is generated.
• High Speed Nano-Sized Electronics May be Possible with Chromophores - Azonano.com