Knowledge Bank

DMABMCA fluoresces from a double potential minimum in the excited state in polar solvents. The high energy band decays from $S2(\pi -\pi \ast )$ state whereas the low energy fluorescence band originates from a closely-lying $S1(1-\alpha \pi )$ state. Stern-Volmer kinetics is applied to study the dynamic quenching process of both states by iodide ion. The results of this investigation will serve as a preliminary study towards the interpretation of the nature of fluorescence quenching mechanism, the nature and efficiency of the electronic energy transfer and the dependence of both excited state potential minima with one another.