Chattopadhyay, Nitin ; Mallick, Arabinda ; Sengupta, Saumitra (2006) Photophysical studies of 7-hydroxy-4-methyl-8-(4'-methylpiperazin-1'-yl) methylcoumarin: a new fluorescent chemosensor for zinc and nickel ions in water Journal of Photochemistry and Photobiology A: Chemistry, 177 (1). pp. 55-60. ISSN 1010-6030
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jphotochem.2005.05.011
Abstract
The title compound, a new coumarin based fluorophore having a piperazine moiety as the photoinduced electron transfer (PET) switch was prepared and its photophysical properties studied in various solvents and under different pH. Solvatochromic shift in the fluorescence spectrum revealed an increase in the dipole moment in the lowest excited singlet state compared to that in the ground state. The compound also showed an interesting intramolecular photoinduced proton transfer phenomenon in the excited state under neutral pH. It was effectively utilized as a new Chelation-enhanced fluorescence (CHEF) based chemosensor for zinc and nickel ions in water.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Chemosensor; Coumarin; Intramolecular Proton Transfer; Solvatochromic Shift; Chelation-enhanced Fluorescence |
| ID Code: | 67449 |
| Deposited On: | 31 Oct 2011 04:55 |
| Last Modified: | 31 Oct 2011 04:55 |
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