Information on Photoinduced Processes from Fluorescence Spectra

Information on Photoinduced Processes from Fluorescence Spectra 

Evidence for the existence of photoinduced processes occurring in supramolecular systems can be obtained in some cases  

1 Photoinduced Electron Transfer in a Calixarene-based Supermolecule Designed for Mercury Ion Sensing [10] 

Calix-DANS2 (compound 7.3) bearing two dansyl fluorophores shows remarkable sensitivity and selectivity to Hg + with a detection limit of 0.3 pM. 

5 X 10 . The quantum yield of the 1 1 complex is estimated to be only 2.5% of the fluorescence quantum yield of Calix-DANS2. The strong quenching upon mercury binding can be tentatively explained in terms of electron transfer from the excited dansyl fluorophore to the bound mercury ion. 

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