Details

Autor(en) / Beteiligte

• CATALAN, J

Titel

On the fluorescence of methyl salicylate: the significance of its IMHB

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2012-07, Vol.14 (25), p.893-899

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The two forms of methyl salicylate bearing an intramolecular hydrogen bond (IMHB) are responsible for the three fluorescence emissions produced by this compound on electronic excitation in inert media. Whereas the form possessing an IMHB between its hydroxyl group and ether oxygen undergoes no excited state intramolecular proton transfer (ESIPT) in its first excited electronic state, that with an IMHB involving the carbonyl oxygen exhibits ESIPT with near-unity efficiency. Whereas the former species exhibits standard photophysical behaviour, the latter species exhibits two fluorescence emissions from the same electronic excited state; a photophysical scheme is proposed, which brings together all the available photophysical evidence for methyl salicylate in inert media. Photophysical diagram proposed to describe the behaviour of the normal molecular structure of methylsalycilate.