| Popis: |
Selective detection of trivalent cations such as Al3+, Cr3+, Fe3+ colorimetrically and ratiometrically were measured in solution by intramolecular charge transfer (ICT) induced by binding of proton with large stoke′s shift. The detection and color changes happened in quick response of time and easily visible to the naked eye. In solid state, when the fluorophore jb2 contacted with trivalent cations fluorescence switching happened, the fluorphore can easily anchored on the silica and recognition is possible by dipping into the trivalent cations and the signaling was occurring even in micromolar level. This proton binding signalling can be reversed by alkaline solutions into solution as well as in solid media. This fluorogenic switching behavior in solvent free condition is offered the promising field in various applications. |
Plný text