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Spectroscopic studies on the excited-state properties of the light-induced antiviral drug hypocrellin A loaded in the mesoporous solid
- Source :
-
Chemical Physics Letters . Sep2004, Vol. 396 Issue 1-3, p102-109. 8p. - Publication Year :
- 2004
-
Abstract
- Hypocrellin A (HA) is encapsulated in the mesoporous material MCM-41 for the first time, and its excited-state behaviors are elucidated by means of steady-state spectroscopies and excited-state lifetime measurements. No ground-state tautomer of HA in the mesoporous solid is deduced based on the spectra observed. Normal fluorescence energy level results from the (l, aπ) state with pπ conjugation; the excited-state intramolecular proton transfer (ESIPT) fluorescence is mostly due to the two-photon excitation (or absorption) of HA. The ESIPT emission intensity becomes truly remarkable with increasing excitation laser intensities. The time-resolved fluorescence measurements are also performed as the further evidence. [Copyright &y& Elsevier]
- Subjects :
- *SPECTROSCOPIC imaging
*ANTIVIRAL agents
*FLUORESCENCE
*DRUGS
Subjects
Details
- Language :
- English
- ISSN :
- 00092614
- Volume :
- 396
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Chemical Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 14375197
- Full Text :
- https://doi.org/10.1016/j.cplett.2004.07.124