1. Ultra-Fast-VUV Photoemission Study of UV Excited 2-NitrophenolPetra Rudolf, Luca Poletto, Fabio Frassetto, Paolo Miotti, Antti Kivimak̈i, Monica de Simone, Cesare Grazioli, Barbara Ressel, Giovanni De Ninno, C. Spezzani, Carlo Callegari, Marcello Coreno, A. Ciavardini, Simona Fornarini, Marco Pezzella, Enrico Bodo, Susanna Piccirillo, 2019, original scientific article Abstract: The initial deactivation pathways of gaseous 2-nitrophenol excited at 268 nm were investigated by time-resolved photoelectron spectroscopy (TRPES) with femtosecond-VUV light, produced by a monochromatized high harmonic generation source. TRPES allowed us to obtain new, valuable experimental information about the ultrafast excited-state dynamics of 2-nitrophenol in the gas phase. In accord with recent ab initio on-the-fly nonadiabatic molecular dynamic simulations, our results validate the occurrence of an ultrafast intersystem crossing leading to an intermediate state that decays on a subpicosecond time scale with a branched mechanisms. Two decay pathways are experimentally observed. One probably involves proton transfer, leading to the most stable triplet aci-form of 2-nitrophenol; the second pathway may involve OH rotation. We propose that following intersystem crossing, an ultrafast fragmentation channel leading to OH or HONO loss could also be operative.
Found in: osebi
Keywords: Ultrafast photoemission, nitrophenol
Published: 12.02.2019; Views: 2908; Downloads: 0
 Fulltext (1,81 MB) |
2. Ultrafast relaxation of photoexcited superfluid He nanodropletsD.M. Neumark, A. Hernando, O. Gessner, C. Grazioli, P. Finetti, M. Drabbels, M. Di Fraia, M. Devetta, A. Demidovich, M. Coreno, C. Callegari, A. Ciavardini, P. O'Keeffe, M. Mudrich, A.C. LaForge, Y. Ovcharenko, P. Piseri, O. Plekan, K.C. Prince, R. Richter, M.P. Ziemkiewicz, T. Moller, J. Eloranta, M. Pi, M. Barranco, F. Stienkemeier, 2020, original scientific article Found in: osebi
Keywords: helium, helium nanodroplet, nanomaterial, density functional theory, dipole, excitation, ionization, photoelectron spectroscopy, photoexcitation, photon, simulation, ultraviolet radiation, ultrafast photoemission, free electron laser, ultrafast spectrscopy
Published: 20.01.2022; Views: 1001; Downloads: 0
Fulltext (2,39 MB) |
3. Experimental and Theoretical Photoemission Study of Indole and Its Derivatives in the Gas PhaseO. Plekan, H. Sa'adeh, A. Ciavardini, C. Callegari, G. Cautero, C. Dri, M. Di Fraia, K.C. Prince, R. Richter, R. Sergo, L. Stebel, M. Devetta, D. Faccialà, C. Vozzi, L. Avaldi, P. Bolognesi, M.C Castrovilli, D. Catone, M. Coreno, F. Zuccaro, E. Bernes, G. Fronzoni, D. Toffoli, 2020, original scientific article Found in: osebi
Keywords: Binding energy, Calculations, Core levels, Electronic structure, Ionization of gases, Ionization potential, Molecular orbitals, Photoelectron spectroscopy, Photoelectrons, Photoemission, Photoionization, Photons, Polycyclic aromatic hydrocarbons, X rays
Published: 21.01.2022; Views: 1034; Downloads: 0
Fulltext (2,23 MB) |
4. Hot-carrier and optical-phonon ultrafast dynamics in the topological insulator Bi2Te3 upon iron deposition on its surfaceG De Ninno, K.C. Prince, M Stupar, B Ressel, B Arnaud, V Juvè, G Vaudel, A Ciavardini, T Sobol, K Balin, M Weis, P Ruello, J Szade, 2021, original scientific article Abstract: This paper presents a complete study of electronic structures and photoexcited carrier dynamics in topological insulators capped with iron and iron oxide. We combine static and time-resolved angle-resolved photoemission spectroscopies (ARPES, TR-ARPES) with time-resolved optical methods (transient optical reflectivity and transmission). Both single crystal and thin films of Bi2Te3 are studied. We show that monolayers of iron and iron oxide significantly affect the electronic band structure at the interface by shifting the Fermi level into the conduction band, which we explain by a band bending effect, and is confirmed by in situ XPS measurements
Found in: osebi
Keywords: time resolved spectroscopies, topological insulators, interfaces
Published: 13.12.2021; Views: 1110; Downloads: 19
Fulltext (2,90 MB) |
5. Carbon and Nitrogen K-Edge NEXAFS Spectra of Indole, 2,3-Dihydro-7-azaindole, and 3-FormylindoleAurora Ponzi, Elisa Bernes, Daniele Toffoli, Giovanna Fronzoni, Carlo Callegari, Alessandra Ciavardini, Michele Di Fraia, Robert Richter, Kevin Charles Prince, Hanan Sa'adeh, Michele Devetta, Davide Faccialà, Caterina Vozzi, Lorenzo Avaldi, Paola Bolognesi, Mattea Castrovilli, Daniele Catone, Marcello Coreno, Oksana Plekan, 2021, original scientific article Found in: osebi
Keywords: Carbon and nitrogen, General description, Hybrid functional, Near-edge X-ray absorption fine structure spectrum, Relevant features, Rydberg character, Theoretical spectra, Time dependent density functional theory
Published: 19.01.2022; Views: 1032; Downloads: 0
Fulltext (4,29 MB) |
6. Adenosine monophosphate recognition by zinc–salophen complexesAlessandra Ciavardini, Antonella Dalla Cort, Simonetta Fornarini, Debora Scuderi, Anna Giardini, Gianpiero Forte, Enrico Bodo, Susanna Piccirillo, 2017, original scientific article Found in: osebi
Keywords: Zn-salophen complexes, anions
Published: 20.01.2022; Views: 905; Downloads: 0
Fulltext (1,58 MB) |
