epsilonzero Posted February 28, 2018 Share Posted February 28, 2018 Would someone be able to explain how the light-sensitive organic molecule methylene blue breaks down under photonic illumination? I often see reports of oxidisation, but this is a reversible process and not an outright breaking of the methylene blue molecule. I know that the 664nm absorption resonance is due to a transition from the nonbonding state to the antibonding state. Does the antibonding state weaken the bond so much so that the molecule is broken more easily somehow? Many thanks in advance! Link to comment Share on other sites More sharing options...
epsilonzero Posted March 1, 2018 Author Share Posted March 1, 2018 Note, I am looking to see how it goes permanently colourless. Leucomethylene blue (whilst colourless) is not a permanent degradation. In addition, demethylation by hydrogen abstraction - though a common procedure - does not turn the solution colourless. Link to comment Share on other sites More sharing options...
epsilonzero Posted March 2, 2018 Author Share Posted March 2, 2018 Figured it out now, not to worry Link to comment Share on other sites More sharing options...
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