Zobrazeno 1 - 10
of 97
pro vyhledávání: '"A.D. Kachkovski"'
Autor:
Olga V. Przhonska, Yuriy L. Slominsky, Honghua Hu, Julia L. Bricks, Alexander A. Viniychuk, Scott Webster, A.D. Kachkovski
Publikováno v:
Chemical Physics. 411:17-25
A comprehensive quantum chemical analysis along with spectral-luminescence measurements has been performed for a new series of 2-azaazulene dyes with different conjugation lengths (n) to better understand the nature of their electronic transitions. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfb3035f3db0bdedada4983b9297133a
https://doi.org/10.1016/j.chemphys.2012.11.017
https://doi.org/10.1016/j.chemphys.2012.11.017
Autor:
Dmitry A. Fishman, Claudiu M. Cirloganu, Seth R. Marder, Olga V. Przhonska, Eric W. Van Stryland, V. V. Kurdyukov, Honghua Hu, Davorin Peceli, Yurii L. Slominsky, Raghunath R. Dasari, A. I. Tolmachev, David J. Hagan, Scott Webster, Stephen Barlow, A.D. Kachkovski
Publikováno v:
The Journal of Physical Chemistry A. 116:4833-4841
The double pump-probe technique (DPP), first introduced by Swatton et al. [Appl. Phys. Lett. 1997, 71, 10], is a variant of the standard pump-probe method but uses two pumps instead of one to create two sets of initial conditions for solving the rate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e15f6a7e94f0b2c5a17732e9f48d3183
https://doi.org/10.1021/jp301051u
https://doi.org/10.1021/jp301051u
Autor:
Iffat Nayyar, Davorin Peceli, A.D. Kachkovski, David J. Hagan, Yuriy P. Kovtun, Dmitry A. Fishman, Honghua Hu, Tatiana V. Timofeeva, Lazaro A. Padilha, Scott Webster, Mykola P. Shandura, Olga V. Przhonska, Eric W. Van Stryland, Paul Tongwa, Andrey O. Gerasov, Artëm E. Masunov
Publikováno v:
The Journal of Physical Chemistry Letters. 3:1222-1228
The two-photon absorption (2PA) spectrum of an organic single crystal is reported. The crystal is grown by self-nucleation of a subsaturated hot solution of acetonitrile, and is composed of an asymmetrical donor-π-acceptor cyanine-like dye molecule.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::100e146f0e972d31c467327849f41b6e
https://doi.org/10.1021/jz300222h
https://doi.org/10.1021/jz300222h
Autor:
Andriy O. Gerasov, Lazaro A. Padilha, Olga V. Przhonska, Scott Webster, Yuriy P. Kovtun, A.D. Kachkovski, Eric W. Van Stryland, Mykola P. Shandura, Iryna Davydenko, Anna Painelli, Yuriy L. Slominsky, Francesca Terenziani, David J. Hagan
Publikováno v:
The Journal of Physical Chemistry Letters. 1:1800-1804
Optical spectra of two families of symmetrical polymethine dyes, bearing a positive and a negative charge, are analyzed based on an essential-state model recently developed for quadrupolar dyes. The model accounts for molecular vibrations and polar s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2f9009a89679146d2ed8df31836972e
https://doi.org/10.1021/jz100430x
https://doi.org/10.1021/jz100430x
Publikováno v:
Journal of Molecular Structure: THEOCHEM. 802:75-83
The electron density distribution and equilibrium molecular geometry of ionic polymethine dyes containing both the simplest terminal groups and carbo and heterocyclic residues were investigated by ab initio and AM1 methods. It is shown that charge wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b560e23de35125d1f83ee8fad1372cf
https://doi.org/10.1016/j.theochem.2006.09.004
https://doi.org/10.1016/j.theochem.2006.09.004
Publikováno v:
Dyes and Pigments. 64:79-84
The nature of the first and the three higher electron transitions in symmetrical and unsymmetrical polymethine dyes containing indeno[2,1-b]chromene residues as end groups is discussed. Diagrams of electron density redistribution upon excitation are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b40a0312538764038c60aaa5e408d49
https://doi.org/10.1016/j.dyepig.2004.04.005
https://doi.org/10.1016/j.dyepig.2004.04.005
Autor:
A.D. Kachkovski, O.O. Zhukova
Publikováno v:
Dyes and Pigments. 63:323-332
The dependence of bond order and bond length changes upon the excitation on the molecular topology of linear conjugated systems has been investigated using quantum-chemical methods. It has been found that the molecular geometry and π-bond orders in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a097678ab1d4f54682a755d9269801a8
https://doi.org/10.1016/j.dyepig.2004.01.006
https://doi.org/10.1016/j.dyepig.2004.01.006
Autor:
A.D. Kachkovski, Yurii L. Slominsky, David J. Hagan, Olga V. Przhonska, Mikhail V. Bondar, E. W. Van Stryland, Raluca A. Negres
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 7:849-863
Subpicosecond transient absorption measurements were performed for several polymethine and squarylium dyes in ethanol solution and a polymeric host over the spectral range 400-1500 nm. A variety of nonlinear effects including saturable absorption, re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89a6ba600c9487839a85f7494e24596e
https://doi.org/10.1109/2944.979347
https://doi.org/10.1109/2944.979347
Autor:
A.D. Kachkovski, Jacques Gallay, Alexander P. Demchenko, Yuri Slominsky, Michel Vincent, Mikhail V. Bondar, Olga V. Przhonska
Publikováno v:
Journal of Photochemistry and Photobiology B: Biology. 52:19-29
The photophysical mechanism responsible for the large Stokes shift in dimethylamino-substituted polymethine dye (DMA-PD) has been studied by steady-state and time-resolved fluorescence spectroscopy. Experiments in low-temperature ethanol glass and in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba1170bade2386c202ccb30a8f2a08a5
https://doi.org/10.1016/s1011-1344(99)00096-2
https://doi.org/10.1016/s1011-1344(99)00096-2
Autor:
A.D. Kachkovski, N.M. Kovalenko
Publikováno v:
Dyes and Pigments. 35:131-148
Features of the electron transitions in a vinylogous series of polymethine dyes and α,ω-disubstituted polyenes are considered. It is shown that the vinylene shift of the longwave length band on chain lengthening by one vinylene group depends on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54707a9acb9f533116bd80622d52cfdc
https://doi.org/10.1016/s0143-7208(96)00094-0
https://doi.org/10.1016/s0143-7208(96)00094-0