PICOSECOND DYNAMICS OF CATION-MACROCYCLE INTERACTIONS IN THE EXCITED-STATE OF AN INTRINSIC FLUORESCENCE PROBE - THE CALCIUM COMPLEX OF 4-(N-MONOAZA-15-CROWN-5)-4'-PHENYLSTILBENE

Authors
DUMON P JONUSAUSKAS G DUPUY F PEE P RULLIERE C LETARD JF LAPOUYADE R
Citation
P. Dumon et al., PICOSECOND DYNAMICS OF CATION-MACROCYCLE INTERACTIONS IN THE EXCITED-STATE OF AN INTRINSIC FLUORESCENCE PROBE - THE CALCIUM COMPLEX OF 4-(N-MONOAZA-15-CROWN-5)-4'-PHENYLSTILBENE, Journal of physical chemistry, 98(41), 1994, pp. 10391-10396
Citations number
14
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
98
Issue
41
Year of publication
1994
Pages
10391 - 10396
Database
ISI
SICI code
0022-3654(1994)98:41<10391:PDOCII>2.0.ZU;2-Z
Abstract
Sub-picosecond absorption spectroscopy is used to examine the dynamics of calcium-azacrown interactions in the excited state of 4-(N-monoaza -15-crown-5)-4'-phenylstilbene, in butyronitrile. This intrinsic fluor escence probe leads (in 8 +/- 2 ps) to a new emitting state which is a ssigned to a twisted intramolecular charge transfer state. When the pr obe is complexed with Ca2+, the kinetic evolution of the absorption an d gain bands is interpreted by a reversible breaking (in 8 +/- 2 ps) o f the nitrogen-calcium bond followed by the reversible formation (in 5 0 +/- 10 ps) of a solvent-separated cation-probe pair.