NDLI: Early excited state dynamics of 6-styryl-substituted pyrylium salts exhibiting dual fluorescence.

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Early excited state dynamics of 6-styryl-substituted pyrylium salts exhibiting dual fluorescence.

Content Provider	Semantic Scholar
Author	Pigliucci, Anatolio Nikolov, Peter Rehaman, Abdul Gagliardi, Laura Cramer, Christopher J. Vauthey, Eric
Copyright Year	2006
Abstract	A series of 6-styryl-2,4-diphenylpyrylium salts exhibiting dual fluorescence has been investigated by fluorescence up-conversion in conjunction with quantum chemical calculations. The short-wavelength emission is due to an excited state localized on the pyrylium fragment and the long-wavelength emission arises from a charge-transfer state delocalized over the whole molecule. The two fluorescing states do not exhibit a precursor-successor relationship. The rise time of the short-wavelength fluorescence is smaller than 200 fs, and that of the long-wavelength emission depends on the electron-donating property of the styryl group substituent. The rise is almost prompt with the weaker donors but is slower, wavelength and viscosity dependent with the strongest electron-donating group. A model involving a S(2)/S(1) conical intersection is proposed to account for these observations.
File Format	PDF HTM / HTML
DOI	10.1021/jp063214x
Alternate Webpage(s)	https://archive-ouverte.unige.ch/files/downloads/0/0/0/0/3/6/4/3/unige_3643_attachment01.pdf
Alternate Webpage(s)	http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref00827.pdf
PubMed reference number	16913670
Alternate Webpage(s)	https://doi.org/10.1021/jp063214x
Journal	Medline
Volume Number	110
Issue Number	33
Journal	The journal of physical chemistry. A
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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