Zobrazeno 1 - 10
of 269
pro vyhledávání: '"Jakob Wirz"'
Autor:
Jakob Wirz
Publikováno v:
CHIMIA, Vol 61, Iss 10 (2007)
The photochemistry group in Basel has focused on the identification and characterization of organic reactive intermediates by flash photolysis with optical and infrared detection. In recent years, these techniques have been applied predominantly to d
Externí odkaz:
https://doaj.org/article/9ce57e0ee55c4530a48c0f833d7aff3d
Autor:
Petr Klán, Jakob Wirz
Publikováno v:
Molecular Photoswitches. :1-18
Publikováno v:
Photochemical & Photobiological Sciences. 16:1749-1756
Azobenzene is a prototypical photochromic molecule existing in two isomeric forms, which has numerous photochemical applications that rely on a precise knowledge of the molar absorption coefficients (e). Careful analysis revealed that the previously
Publikováno v:
Photochemicalphotobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology. 16(12)
The quantum yields of azobenzene photoisomerization in methanol solution were redetermined using newly obtained molar absorption coefficients of its cis- and trans-isomers. The results differ substantially from those published previously, especially
Publikováno v:
Physical chemistry chemical physics : PCCP. 18(24)
The photophysical and photochemical properties of rose bengal (RB) in degassed aqueous and acetonitrile solutions were studied using steady-state and transient absorption spectroscopies. This comprehensive investigation provides detailed information
Publikováno v:
Photochemical & Photobiological Sciences. 11:967-971
The pH-rate profiles for the ketonization of the (E)- and (Z)-photoenols of o-methylacetophenone (MA) in aqueous solution were determined by nanosecond laser flash photolysis. Carbon protonation of the enol anions of MA by solvent water is exceptiona
Publikováno v:
Accounts of chemical research. 48(12)
Photoremovable protecting groups (PPGs) are chemical auxiliaries that provide spatial and temporal control over the release of various molecules: bioagents (neurotransmitters and cell-signaling molecules, Ca(2+) ions), acids, bases, oxidants, insecti
Publikováno v:
Photochemical & Photobiological Sciences. 9:901-907
Benzo[b]cyclohexa-2,4-dien-1-one (4) and benzo[b]cyclohexa-2,5-dien-1-one (5), the two most stable keto tautomers of 1-naphthol (1), were generated in aqueous solution by Norrish Type II fission of 4- and 2-phenacyl-1-tetralone, respectively, and the
Publikováno v:
Helvetica Chimica Acta. 92:1909-1922
The well-known photochromic tautomerism of 2-(2,4-dinitrobenzyl)pyridine (1; CH; Scheme 1) was re-investigated by flash photolysis in aqueous solution in view of its potential application as a light-activated proton pump. Irradiation of 1 yields the
Publikováno v:
The Journal of Organic Chemistry. 74:5219-5227
Three new trifluoromethylated p-hydroxyphenacyl (pHP)-caged gamma-aminobutyric acid (GABA) and glutamate (Glu) derivatives have been examined for their efficacy as photoremovable protecting groups in aqueous solution. Through the replacement of hydro