Chattopadhyay, Nitin ; Barroso, Monica ; Serpa, Carlos ; Silva, M. Isilda ; Arnaut, Luis G. ; Formosinho, Sebastião J. (2004) Photophysics of 3-hydroxyflavone in supercritical CO2: a probe to study the microenvironment of SCF Chemical Physics Letters, 387 (4-6). pp. 263-266. ISSN 0009-2614
Full text not available from this repository.
Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.cplett.2004.01.122
Abstract
The excitation of 3-hydroxyflavone (3HF) to its second excited singlet state (S2) gives rise to dual fluorescence in supercritical carbon dioxide. The ultraviolet fluorescence originated from the S2 state of 3HF is well separated from the green emission emanating from the tautomeric form, produced via the excited state intramolecular proton transfer. The relative intensity of the S2 to the tautomer fluorescence (S2/T) has been studied as a function of pressure and temperature. It is shown that this ratio reflects the microheterogeneity of the supercritical CO2, and confirms the value of fluorometric probes in disclosing the microscopic properties of supercritical fluids.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 67448 |
| Deposited On: | 31 Oct 2011 04:53 |
| Last Modified: | 31 Oct 2011 04:53 |
Repository Staff Only: item control page
