There are several papers on the decoloration of the dyes using different method including enzymatic decoloration . Do you think that decoloration means degradation ? Explain....
What is the "delocaration?"
"Do you think that decoloration means degradation ? " Not always. An example is a pH-indicator.
Dear Prof Deshmukh. The key molecular changes associated with decolouration may be structural rather than chemical. Dyes appear coloured because they exhibit selective light absorption at certain parts of the spectrum due to molecular level resonance of the bonding electrons. That is to say, the whole chemical structure of a dye resonates at a low enough frequency to interact with and absorb light photons. The only type of structure that does this is a chemical structure that includes long conjugated chains of alternate single and double valency bonds, the longer the chain, the lower the frequency. Decolouration by enzymatic action, oxidative bleaching and photo-fading in effect either moves the light absorption bands out of the visible into the UV spectrum by shortening the conjugated chains or extinguishing them completely by chemical disruption. In the case of Ph. dependant and chemically reductive colour changes the colorant undergoes a multi-dimensional structural alteration effect rather than chemical degradation and in effect the resonance pattern is thus either inhibited or altered.
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