Excited-state intramolecular proton

Poly(aryl ether) branches of generation 1 to 3 have been appended to a pho-totautomerizable quinoHne core to investigate the effect of dendritic architecture on the excited state intramolecular proton transfer [45]. The changes observed in the absorption and emission spectra on increasing dendrimer generation indicate that the dendritic branches affect the planarity of the core and therefore the efficiency of the excited state intramolecular proton transfer and of the related fluorescence processes. [Pg.170]

Le Gourrierec, D. Ormson, S. M. Brown, R. G. Excited-state intramolecular proton transfer. Part 2 ESIPT to oxygen. Prog. React. Kinet. 1994, 19, 211-275. [Pg.30]

Foster, K. L. Baker, S. Brousmiche, D. W. Wan, P. o-Quinone methide formation from excited state intramolecular proton transfer (ESIPT) in an o-hydroxystyrene. J. Photochem. Photobiol. A Chem. 1999, 129, 157-163. [Pg.31]

Lukeman, M. Wan, P. Excited state intramolecular proton transfer (ESIPT) in 2-phenylphenol an example of proton transfer to a carbon of an aromatic ring. J. Chem. Soc., Chem. Commun. 2001, 1004-1005. [Pg.32]

Lukeman, M. Wan, P. A new type of excited-state intramolecular proton transfer proton transfer from phenol OH to a carbon atom of an aromatic ring observed for 2-phenyl-phenol. J. Am. Chem. Soc. 2002, 124, 9458-9464. [Pg.32]

Basaric, N. Wan, P. Competing excited state intramolecular proton transfer pathways from phenol to anthracene moieties. J. Org. Chem. 2006, 71, 2677-2686. [Pg.32]

Coe JD, Martinez TJ (2005) Competitive decay at two- and three-state conical intersections in excited-state intramolecular proton transfer. J Am Chem Soc 127 4560... [Pg.336]

Coe JD, Martinez TJ (2006) Ab initio molecular dynamics of excited-state intramolecular proton transfer around a three-state conical intersection in malonaldehyde. J Phys Chem A 110 618-630... [Pg.336]

Excited-state intramolecular proton transfer (ESIPT) exhibits different regularities [49, 50]. Commonly, this is a very fast and practically irreversible reaction proceeding along the H-bonds preexisting in the ground state. Therefore, only the reaction product band is seen in fluorescence spectra. Such cases are not interesting for designing the fluorescence reporters. The more attractive dual emission is... [Pg.19]

Oncul S, Demchenko AP (2006) The effects of thermal quenching on the excited-state intramolecular proton transfer reaction in 3-hydroxyflavones. Spectrochim Acta A Mol Biomol Spectrosc 65 179-183... [Pg.24]

Klymchenko AS, Demchenko AP (2003) Multiparametric probing of intermolecular interactions with fluorescent dye exhibiting excited state intramolecular proton transfer. Phys Chem Chem Phys 5 461 -68... [Pg.25]

Keywords Excited-state intramolecular proton transfer Fluorescence dye Photoinduced electron transfer Proton coupled electron transfer Relaxation dynamics... [Pg.226]

The fundamental approach to a proton transfer process, which is crucial to mimic many chemical and biological reactions, has relied deeply on studies of excited-state intramolecular proton transfer (ESIPT) reactions in the condensed phase. [Pg.238]

Chou PT, Chen YC, Yu WS et al (2001) Spectroscopy and dynamics of excited-state intramolecular proton-transfer reaction in 5-hydroxyflavone. Chem Phys Lett 340 89-97... [Pg.262]

Jang DJ, Kelley DF (1985) Time-resolved and steady-state fluorescence studies of the excited-state intramolecular proton transfer and relaxation of 2-hydroxy-4, 5-naphthotro-pone. J Phys Chem 89 209-211... [Pg.262]

Sytnik A, Kasha M (1994) Excited-state intramolecular proton transfer as a fluorescence probe for protein binding-site static polarity. Proc Natl Acad Sci USA 91 8627-8630... [Pg.263]

Lim SJ, Seo J, Park SY (2006) Photochromic switching of excited-state intramolecular proton-transfer (ESIPT) fluorescence a unique route to high-contrast memory switching and nondestructive readout. J Am Chem Soc 128 14542-14547... [Pg.263]

Kim S, Seo J, Jung HK et al (2005) White luminescence from polymer thin films containing excited-state intramolecular proton-transfer dyes. Adv Mater 17 2077-2082... [Pg.263]

Ameer-Beg S, Ormson SM, Brown RG et al (2001) Ultrafast measurements of excited state intramolecular proton transfer (ESIPT) in room temperature solutions of 3-hydroxyflavone and derivatives. J Phys Chem A 105 3709-3718... [Pg.263]

Yu WS, Cheng CC, Cheng YM et al (2003) Excited-state intramolecular proton transfer in five-membered hydrogen-bonding systems 2-pyridyl pyrazoles. J Am Chem Soc 125 10800-10801... [Pg.263]

Takeuchi T, Tahara T (2005) Coherent nuclear wavepacket motions in ultrafast excited-state intramolecular proton transfer sub-30-fs resolved pump-probe absorption spectroscopy of 10-hydroxybenzo[h]quinoline in solution. J Phys Chem A 109 10199-10207... [Pg.264]

Kim CH, Joo T (2010) Coherent excited state intramolecular proton transfer probed by time-resolved fluorescence. Phys Chem Chem Phys. doi 10.1039/b915768a... [Pg.264]

Roberts EL, Chou PT, Alexander TA et al (1995) Effects of organized media on the excited-state intramolecular proton transfer of 10-hydroxybenzo[h]quinoline. J Phys Chem 99 5431-5437... [Pg.264]

Chen KY, Cheng YM, Lai CH et al (2007) Ortho green fluorescence protein synthetic chromophore Excited-state intramolecular proton transfer via a seven-membered-ring hydrogen-bonding system. J Am Chem Soc 129 4534 -535... [Pg.264]

Shynkar VV, Mely Y, Duportail G et al (2003) Picosecond time-resolved fluorescence studies are consistent with reversible excited-state intramolecular proton transfer in 4 -(dialkylamino)-3-hydroxyflavones. J Phys Chem A 107 9522-9529... [Pg.265]

Fig. 4 Excited state intramolecular proton-transfer (ESIPT) mechanism of 3-hydroxychromone...

Klymchenko AS, Demchenko AP (2002) Electrochromic modulation of excited-state intramolecular proton transfer the new principle in design of fluorescence sensors. J Am Chem Soc 124 12372-12379... [Pg.343]

Epoxide derivatives of 2,5-bis-oxyphenyl-l,3,4-oxadiazoles and fluorescein, which are luminescent epoxide monomers, were synthesized and their luminescence properties were studied <1999CHE358>. The excited state intramolecular proton transfer reactions and luminescent properties of the ort j-hydroxy derivatives of 2,5-diphenyl-1,3,4-oxadiazole were elucidated to conclude that the proton phototransfer reaction is very efficient in the studied... [Pg.456]

To conclude our description of techniques, the use of nanosecond and picosecond spectroscopy which has been applied to excited state intramolecular proton transfer (ESIPT) will be mentioned briefly (Beens et al., 1965 Huppert et al., 1981 Hilinski and Rentzepis, 1983). A large number of inter-and intramolecular proton transfers have been studied using these methods (Ireland and Wyatt, 1976) but in the case of processes which are thought to involve simple proton transfer along an intramolecular hydrogen bond it is usually only possible to estimate a lower limit for the rate coefficient. [Pg.146]

Rate coefficients in the expected range have been observed in excited state intramolecular proton transfers involving 2-(2-hydroxyphenyl)benzothiazole (Barbara et al., 1980a) and salicylideneaniline (Barbara et al., 1980b). In the former, the observation of fluorescence was explained by Scheme 2 and the... [Pg.147]