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What is chromophore explain with example?

What is chromophore explain with example?

(a) CHROMOPHORE: The term chromophore was previously used to denote a functional group of some other structural feature of which gives a color to compound. For example- Nitro group is a chromophore because its presence in a compound gives yellow color to the compound.

What is meant by Auxochrome?

An auxochrome (from Ancient Greek αὐξάνω auxanō “increase” and χρῶμα chrōma “colour”) is a group of atoms attached to a chromophore which modifies the ability of that chromophore to absorb light.

What are chromophores quizlet?

Chromophores are charged groups which can be either cationic or anionic. Examples of basic stains and acidic stains that contain chromophores are crystal violet and eosin. Basic dyes are used for the staining of bacterial cells and acidic dyes (eosin) do not stain them.

What are the 5 chromophores?

Examples of endogenous chromophores are melanin, haemoglobin, (oxy haemoglobin, de-oxyhaemoglobin and meth haemoglobin), water, protein, peptide bonds, aromatic amino acids, nucleic acid, urocanic acid and bilirubin. [3] Exogenous compounds like different colors of tattoo ink also act as chromophores.

What is chromophore Slideshare?

CHROMOPHORE Chromophore – Any isolated covalently bonded group that shows a characteristic absorption in the UV/Visible region. Eg: -C=C-, C = O Any substance (groups) which absorbs radiation at particular wave length this may or may not impart colour to the compound.

What are chromophore chromogen and Auxochrome explain?

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. Auxochrome increases the color of any organic substance.

What are auxochrome and chromophores?

Auxochromes are a bunch of atoms that when combined with an appropriate chromophore heighten or enhance the color. Chromophores are constituents of molecules that absorb or reflect certain colors when light fall on them. They are used together to make dyes.

What is auxochrome in UV spectroscopy?

Auxochrome Auxochrome: It is defined as any group which does not itself act as a chromophores but whose presence brings about a shift of the absorption band towards the red end of the spectrum (longer wavelength).

What are chromophores What is the difference between basic and acidic dyes?

a. Ionic groups present in dyes that are commonly used for staining microbes. Chromophores are charged groups which can be either cationic or anionic. Basic dyes are used for the staining of bacterial cells and acidic dyes (eosin) do not stain them.

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