| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5271181 | Tetrahedron Letters | 2009 | 5 Pages |
A new coumarin-based sensor molecule (L1) has been synthesized and this was found to bind calcium and magnesium ions more effectively as compared to other alkali/alkaline earth/lanthanide and certain transition metal ions. A significant enhancement in fluorescence intensity was observed on binding to Ca2+ and Mg2+ ions; while a minor quenching was observed for weakly bound Hg2+, Ni2+, Fe3+, and Co2+ ions. PET process, coupled with the ICT process, is proposed to explain the observed spectral response.
Graphical abstractA new coumarin sensor molecule (L1) has been synthesized. This was found to bind preferentially to calcium and magnesium ions. On binding to these two metal ions fluorescence of the coumarin was found to be enhanced. Both ICT and PET processes are presumed to be operational. Fluorescence was found to be quenched for Hg2+. Results of the steady state fluorescence studies matched well with those of time resolved studies using TCSPC technique.Download full-size image
