Measured excited state life time for terephthalic acid (2.4 ns) and 2-hdyroxyl terephthalic acid (7.6ns) by TCSPC method in acetonitrile which was obtained after monoexponential fitting of the decay curve. I was wondering how hydroxy group can stabilize the excited state?
Hammad Cheema
Peter you are right in much of your explanations, thought the question is still there if everything is same (solvent, method etc) how the presence of hydroxyl group changes the electronic states which result in higher excited state lifetime?
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