Dr. Vladimir Chirvony Profile

Dr. Vladimir Chirvony

at Univ de València

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Publications (10)

Proceedings Article | 1 August 2021 Presentation + Paper

Lead halide perovskite nanocrystals: optical properties and nanophotonics

Juan Martinez-Pastor, Hamid Pashaei Adl, Setatira Gorji, Juan Navarro-Arenas, Guillermo Muñoz-Matutano, Isaac Suárez, Vladimir S. Chirvony, Andrés F. Gualdrón-Reyes, Iván Mora-Seró

Proceedings Volume 11800, 1180013 (2021) https://doi.org/10.1117/12.2595442

KEYWORDS: Perovskite, Nanocrystals, Excitons, Optical properties, Nanophotonics, Polymethylmethacrylate, Metals, Bromine, Temperature metrology, Near field optics

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Proceedings Article | 22 February 2017 Paper

Influence of oxidation state on water solubility of Si nanoparticles prepared by laser ablation in water

Yu. Ryabchikov, A. Al-Kattan, V. Chirvony, J. Sanchez-Royo, M. Sentis, V. Yu. Timoshenko, A. Kabashin

Proceedings Volume 10078, 100780C (2017) https://doi.org/10.1117/12.2257404

KEYWORDS: Nanomaterials, Silicon, Nanoparticles, Laser therapeutics, Cancer, Laser ablation, Toxicity, Biomedical optics, Oxidation, Oxides, Transmission electron microscopy, Oxygen, Argon, Femtosecond phenomena

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Proceedings Article | 1 May 2012 Paper

Colloidal QDs-polymer nanocomposites

H. Gordillo, I. Suárez, P. Rodríguez-Cantó, R. Abargues, R. García-Calzada, V. Chyrvony, S. Albert, J. Martínez-Pastor

Proceedings Volume 8424, 84242A (2012) https://doi.org/10.1117/12.921838

KEYWORDS: Cadmium sulfide, Nanocomposites, Waveguides, Polymers, Polymethylmethacrylate, Absorption, Ultraviolet radiation, Neodymium, Solar cells, Visible radiation

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Proceedings Article | 2 January 1995 Paper

Photophysics of water-soluble Cu(II)-porphyrin: groove-bounding to polynucleotide as compared to dissolving in neat buffer solution

Vladimir Galievsky, Vladimir Chirvony, Laurent Chinsky, Pierre-Yves Turpin

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197449

KEYWORDS: Absorption, Picosecond phenomena, Molecules, Life sciences, Carbon monoxide, Ions, Oxygen, Lens design, Laser applications, Spectroscopy

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Proceedings Article | 2 January 1995 Paper

Study of spectral and photophysical properties of covalently linked porphyrin dimers

Vladimir Chirvony, G. Gurinovich

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197469

KEYWORDS: Absorption, Luminescence, Traumatic brain injury, Time resolved spectroscopy, Fluorescence spectroscopy, Spectroscopy, Picosecond phenomena, Femtosecond phenomena, Polymer thin films, Polymers

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Proceedings Article | 2 January 1995 Paper

Investigation of the redox activity of hemoproteins in model conditions: experimental justification of an unusual mechanism of alcohol-initiated photoreduction of Fe(III)-octaethylporphyrin

N. Ivashin, S. Terekhov, Alexander Shulga, Vladimir Galievsky, Vladimir Chirvony, K. Dzilinski

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197425

KEYWORDS: Raman spectroscopy, Absorption, Iron, Bioalcohols, Molecules, Systems modeling, Solids, Absorption spectroscopy, Life sciences, Thin films

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Proceedings Article | 2 January 1995 Paper

Absorption properties of excited (doublet) states of Zn-porphyrin pi-radical anions

Igor Filatov, Vladimir Chirvony, Gennady Sinyakov

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197424

KEYWORDS: Absorption, Picosecond phenomena, Absorption spectroscopy, Chemistry

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Proceedings Article | 1 May 1991 Paper

Inter- and intramolecular processes in metalloporphyrins: study by transient absorption and resonance Raman and coherent anti-Stokes Raman scattering

Pavel Apanasevich, Vladimir Chirvony, Sergei Kruglik, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57272

KEYWORDS: Absorption, Raman spectroscopy, Molecules, Laser applications, Picosecond phenomena, Spectroscopy, Metals, Scattering, Laser scattering, Raman scattering

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The steady interest in metalloporphyrins (Me-P) which have a central metal with an unfilled d-electronic shell is due to the rich variety of photoinduced physico-chemical processes they participate in, and by the possibility of modelling on the basis of them, the behavior of related native biological complexes. Me-Ps with an unfilled d-shell of the central atom have typical two-band absorption spectra in the ground electronic state: intense Soret or B band in the near UV and less intense Q band in the visible. According to Gouterman's fourorbital model,' the Me-P absorption spectrum arises from the promotion of ir-electrons from the highest occupied molecular orbitals a, , a2 to the lowest unoccupied orbitals e of the porphyrin conjugated macrocycle. The a, and a2 orbitals are quasi-degenerate and the electron excited configurations e have the same symmetry. That is why there is a strong mixing between the two orbital excitations a, -e and a, - e due to the configurational interaction via the electron-electron repulsion, resulting in a two-band absorption spectrum. The effect of the central atom is interpreted in this model as a perturbation of the ir-states of the porphyrin ring. The perturbation is largely determined by the electrons of the unfilled shells of the metal ion (e.g. the md'-shell). This effect is quite pronounced for the ground electronic state, nevertheless the interactions of excited ir-electronic configurations with d-electron ones cause more dramatic changes in the spectroscopic properties of Me-P excited states. New low-lying excited states are possible: the charge-transfer (CT) levels related to the electrodensity transfering from the ring a, , a2 to the d-orbitals of central metal (ir-d states) or from the d-orbitals to the ring e(d - ir states), and (d - d) levels bound up with the d-electron excitations. The present paper deals with the investigations of porphyrin metallocomplexes with nickel (Ni-P) and copper (Cu-P) having electron configurations 3d8 and 3d9 , respectively.

Proceedings Article | 1 May 1991 Paper

Excitation energy relaxation in model aggregates of photosynthetic pigments upon picosecond laser excitation

Vladimir Chirvony, Eduard Zenkevich, Roaldas Gadonas, V. Krasauskas, A. Pelakauskas

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57400

KEYWORDS: Picosecond phenomena, Absorption, Pulsed laser operation, Chromophores, Polymers, Molecules, Absorption spectroscopy, Binary data, Photons, Absorbance

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Proceedings Article | 1 May 1991 Paper

Dynamics of ultrafast photoprocesses in Zn-octaethylporphyrin and Zn-octaethylphlorin pi-monoanions

Vladimir Chirvony, Gennady Sinyakov, Roaldas Gadonas, V. Krasauskas, A. Pelakauskas

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57354

KEYWORDS: Absorption, Picosecond phenomena, Ultrafast phenomena, Laser applications, Biology, Spectroscopy, Infrared spectroscopy, Absorption spectroscopy, Luminescence, Physics

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Showing 5 of 10 publications

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