Solvated electrons in glycerol were generated via a resonant one-photon photodetachment of the charge-transfer-to-solvent (CTTS) band of I- in glycerol (Gl) after irradiation with a 248 nm excimer laser. Optical absorption spectra of solvated electrons (esolv-) in Gl were recorded as a function of temperature (381
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Exploring direct photodetachment and photodissociation-photodetachment dynamics of platinum iodide anions (PtIn-, n = 2-5) using cryogenic photoelectron spectroscopy.
J Chem Phys
December 2024
State Key Laboratory of Precision Spectroscopy, and School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
The direct photodetachment and two-photon photodissociation-photodetachment processes of a series of PtIn- (n = 2-5) anions were systematically studied using cryogenic anion photoelectron spectroscopy and first-principles electronic structure calculations. The adiabatic/vertical detachment energies (ADEs/VDEs) of these anions were determined from their 193 nm photoelectron (PE) spectra, i.e.
View Article and Find Full Text PDFUnraveling the decarboxylation dynamics of the fluorescein dianion with fragment action spectroscopy.
J Chem Phys
April 2023
Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom.
The decarboxylation dynamics of the doubly deprotonated fluorescein dianion, Fl2-, are investigated by recording fragment action spectra for the anion, Fl-, and its decarboxylated analog, Fl-CO2-, using a new reflectron secondary mass spectrometer. The formation of the anion, Fl-, is directly investigated by photoelectron imaging. The Fl- and Fl-CO2- action spectra indicate that, for λ < 400 nm, one-photon dissociative photodetachment, i.
View Article and Find Full Text PDFPhotoelectron circular dichroism of a model chiral anion.
J Chem Phys
January 2022
Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany.
Article Synopsis
- The study investigates Photoelectron Circular Dichroism (PECD) in chiral anionic systems using a theoretical model, particularly focusing on one-photon detachment.
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Electron Detachment as a Probe of Intrinsic Nucleobase Dynamics in Dianion-Nucleobase Clusters: Photoelectron Spectroscopy of the Platinum II Cyanide Dianion Bound to Uracil, Thymine, Cytosine, and Adenine.
J Phys Chem B
September 2015
Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
We report the first low-temperature photoelectron spectra of isolated gas-phase complexes of the platinum II cyanide dianion bound to nucleobases. These systems are models for understanding platinum-complex photodynamic therapies, and a knowledge of the intrinsic photodetachment properties is crucial for characterizing their broader photophysical properties. Well-resolved, distinct peaks are observed in the spectra, consistent with complexes where the Pt(CN)4(2-) moiety is largely intact.
View Article and Find Full Text PDFOn the participation of photoinduced N-H bond fission in aqueous adenine at 266 and 220 nm: a combined ultrafast transient electronic and vibrational absorption spectroscopy study.
J Phys Chem A
November 2014
School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom.
A combination of ultrafast transient electronic absorption spectroscopy (TEAS) and transient vibrational absorption spectroscopy (TVAS) is used to investigate whether photoinduced N–H bond fission, mediated by a dissociative 1πσ(*) state, is active in aqueous adenine (Ade) at 266 and 220 nm. In order to isolate UV/visible and IR spectral signatures of the adeninyl radical (Ade[-H]), formed as a result of N–H bond fission, TEAS and TVAS are performed on Ade in D2O under basic conditions (pD = 12.5), which forms Ade[-H](-) anions via deprotonation at the N7 or N9 sites of Ade's 7H and 9H tautomers.
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