Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ben-Zion Magnes"'
Publikováno v:
The Journal of Chemical Physics. 121:9593-9610
We investigate one of the fundamental reactions in solutions, the neutralization of an acid by a base. We use a photoacid, 8-hydroxy-1,3,6-trisulfonate-pyrene (HPTS; pyranine), which upon photoexcitation reacts with acetate under transfer of a deuter
Publikováno v:
Solid State Ionics. 168:225-233
The effect of specific hydrogen-bonding interactions on the electronic spectra and the infrared (IR) absorption spectra of several naphthol-type photoacids was investigated. A correlation between the p K a * of the photoacid and its optical solvatoch
Publikováno v:
Science. 301:349-352
The neutralization reaction between an acid and a base in water, triggered after optical excitation, was studied by femtosecond vibrational spectroscopy. Bimodal dynamics were observed. In hydrogen-bonded acid-base complexes, the proton transfer proc
Publikováno v:
The Journal of Physical Chemistry A. 105:9674-9680
We have carried out temperature dependence studies of the geminate quenching reaction of 1-naphthol utilizing steady-state and time-resolved fluorescence spectroscopy. The outcome was analyzed using both analytic and numeric procedures. A novel metho
Publikováno v:
Israel Journal of Chemistry. 39:361-373
The steady-state fluorescence spectra of 1-methoxynaphthalene and 1-naphthol were measured in pure organic solvents and in binary mixtures of water and several organic solvents. The 1-isomers exhibited a much larger fluorescence Stokes-shift than the
Publikováno v:
Berichte der Bunsengesellschaft für physikalische Chemie. 102:511-517
The introduction of naphthol derivatives that exhibit excited-state acidities comparable to strong mineral acids, has opened the way for direct investigation of ultrafast proton-transfer in aqueous solutions and alcohols. We report on the direct meas
Publikováno v:
Berichte der Bunsengesellschaft für physikalische Chemie. 102:504-510
The back proton recombination following the photo-dissociation of 1-naphthol was studied by a time-correlated single-photon counting apparatus. The measured picosecond time-resolved fluorescence decay profiles were analyzed using the numerical soluti
Publikováno v:
Chemical Physics Letters. 281:413-420
Acid–base reactions are usually treated as diffusion-controlled. In this study we directly measure the intrinsic proton transfer rates at the reaction contact of several naphthols photoacids–carboxylic base pairs. Deviations from the diffusion-co
Publikováno v:
Chemphyschem : a European journal of chemical physics and physical chemistry. 6(4)
We investigate with femtosecond mid-infrared spectroscopy the vibrational-mode characteristics of the electronic states involved in the excited-state dynamics of pyranine (HPTS) that ultimately lead to efficient proton (deuteron) transfer in H2O (D2O
Publikováno v:
Femtochemistry and Femtobiology
Exploring the mechanism of proton transfer between acid and bases is of fundamental importance for the understanding of the autoionization of water and the associated von Grotthuss mechanism, acid-base neutralizations, enzyme catalysis, and proton pu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9632f6295023cc7c6f0190a5d4cc750d
https://doi.org/10.1016/b978-044451656-5/50037-2
https://doi.org/10.1016/b978-044451656-5/50037-2