A5047015511- Advanced Chemical Physics Studies
- Quantum, superfluid, helium dynamics
- Optical measurement and interference techniques
- Particle accelerators and beam dynamics
- TiO2 Photocatalysis and Solar Cells
- Spectroscopy and Quantum Chemical Studies
- Luminescence Properties of Advanced Materials
- Photochemistry and Electron Transfer Studies
- Advanced Photocatalysis Techniques
- Molecular Spectroscopy and Structure
- Analytical Chemistry and Sensors
- Spectroscopy and Laser Applications
- Gyrotron and Vacuum Electronics Research
- Particle Accelerators and Free-Electron Lasers
- Electron and X-Ray Spectroscopy Techniques
- Laser-Matter Interactions and Applications
- Photodynamic Therapy Research Studies
- Photocathodes and Microchannel Plates
- Calibration and Measurement Techniques
- Digital Holography and Microscopy
- Material Science and Thermodynamics
- bioluminescence and chemiluminescence research
- Advanced Radiotherapy Techniques
- Welding Techniques and Residual Stresses
- Laser-Plasma Interactions and Diagnostics
Institute of Chemical Kinetics and Combustion
2013-2024
UCLouvain
2024
Novosibirsk State University
2013-2021
Features of the near-infrared phosphorescence singlet oxygen 1O2 photosensitized by TiO2 in solutions have been investigated. The short-lived with spectral maximum at approximately 1300 nm is observed to follow excitation pulsed laser radiation 355 suspended CCl4 and water H2O. shorter lifetime shift this phosphorescence, as compared sensitized phenalenone these solvents, are attributed adsorbed state emitting oxygen. pulse energy dependence indicates two-photon three-photon nature...
The channel of singlet oxygen O2((1)Δg) photogeneration from van der Waals complexes X-O2 has been investigated to discriminate between two possible mechanisms based on charge-transfer (CT) or double spin-flip (DSF) transitions. results obtained in this work for with X = ethylene C2H4, 1,3-butadiene C4H6, deuterated methyl iodide CD3I, benzene C6H6 and water H2O those previously indicate the DSF mechanism as a source oxygen. formation is observed only when energy exciting quantum sufficient...
Velocity map imaging of the photofragments arising from two-photon photoexcitation molecular iodine in energy range 73 500–74 500 cm−1 covering bands high-lying gerade Rydberg states [2Π1/2]c6d;0g+ and [2Π1/2]c6d;2g has been applied. The ion signal was dominated by atomic fragment I+. Up to 5 dissociation channels yielding I+ ions with different kinetic energies were observed when I2 molecule excited within discrete peaks their satellites this region. One these gives rise images I− equal...
The predissociation dynamics of superexcited iodine is studied by femtosecond ion imaging spectroscopy, providing direct control wavepacket propagation in ion-pair states.
The predissociation dynamics of lithium iodide (LiI) in the first excited A-state is investigated for molecules gas phase and embedded helium nanodroplets, using femtosecond pump-probe photoionization spectroscopy. In phase, transient Li(+) LiI(+) ion signals feature damped oscillations due to excitation decay a vibrational wave packet. Based on high-level ab initio calculations electronic structure LiI simulations packet dynamics, exponential signal found result from predominantly at lowest...
The photodissociation of van der Waals complexes iodine X–I2 (X = I2, C2H4) excited via Charge-Transfer (CT) band has been studied with the velocity map imaging technique. Photodissociation both gives rise to translationally “hot” molecular I2 channels differing by kinetic energy and angular distribution recoil directions. These measured characteristics together analysis model potential surface for these allow us infer back-electron-transfer (BET) in CT state be a source observed make...
ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTReply to "Comment on 'Singlet Oxygen 1O2 in Photocatalysis TiO2. Where Does It Come from?'"Alexander V. DemyanenkoAlexander DemyanenkoVoevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk 630090, RussiaNovosibirsk State University, RussiaMore by Alexander Demyanenko, Alexandr S. BogomolovAlexandr BogomolovVoevodsky Bogomolov, Nikolay DozmorovNikolay DozmorovVoevodsky Dozmorovhttp://orcid.org/0000-0002-1101-4526, Alexandra I....
We present a series of improvements the FANTASIO experimental set-up that couples supersonic expansion to cavity ring-down spectrometer originally reported by M. Herman, et al., Mol. Phys. 105, 815 (2007). In particular, implementation new pulsed slit valve 80 mm in length is detailed. The design based on powerful piezo stack actuator. Schlieren imaging used verify homogeneity molecular beam and quality performance. ability form weakly bound van der Waals complexes assessed using...
Tetracene (Tc) is a prototype material undergoing singlet fission (SF), the formation of pair triplet excitons from exciton. The tetracene dimer Tc2 supposed to be structural unit providing SF behavior. This work devoted study mechanism exciton decay in van der Waals dimers Tc2. A nanosecond pump-probe approach used, tuning both pumping and probing wavelengths. It shown that photoexcitation Tc monomer gives rise Tc(T1) with very similar photoionization spectra, indicating an intersystem...
We present the observation of N2–H2O van der Waals complex in 2OH stretch overtone region. The high-resolution jet cooled spectra were measured using a sensitive continuous wave cavity ringdown spectrometer. Several bands observed and vibrationally assigned terms ν1, ν2, ν3, vibrational quantum numbers isolated H2O molecule, as (ν1′ν2′ν3′)←(ν1″ν2″ν3″)=(200)←(000) (101) ← (000). A combination band involving excitation in-plane bending motion N2 vibration water is also reported. analyzed set...
The origin of near-infrared (NIR, 1100–1700 nm) luminescence appearing after UV-excitation (355 TiO2 (P25, rutile, anatase), ZnO, and WO3 photocatalysts is investigated experimentally with ab initio complete active space (CAS) calculations. all gives rise to NIR very similar spectra. strong effect the elevated pressure oxygen on rate burning-out precursor indicates that adsorbed this precursor. Observed spectra contain a "narrow" band at 1300 nm red-shifted "broad" maximum 1600–1620 nm, both...
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Origin of Near-Infrared Luminescence Provided by UV-Photoexcitation TiO2-Based and Non-TiO2-Based Photocatalysts: Experiment Theory"Kirill S. ErshovKirill ErshovMore Kirill Ershov, Alexandr BogomolovAlexandr BogomolovMore Bogomolov, Alexander V. DemyanenkoAlexander DemyanenkoMore Demyanenko, Alexei O. YanshinAlexei YanshinMore Yanshin, Nikolay DozmorovNikolay DozmorovMore...