Photophysical Processes Occurring in a Zn-phthalocyanine in Ethanol Solution and on TiO2 Nanostructures
| Autor: | Sara Notarantonio, Alessandro Iagatti, Gloria Zanotti, Giuseppe Calogero, Sandra Doria, Nicola Angelini, Giovanna Pennesi, Paolo Foggi, Gentilina Rossi, Anna Maria Paoletti, Agnese Marcelli |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Nanostructure
CONVERSION EFFICIENCY Kinetics Nanoparticle Electron Photochemistry ULTRAFAST FILMS ABSORPTION SENSITIZED SOLAR-CELLS EXCITED-STATE DYNAMICS ZINC PHTHALOCYANINE PORPHYRIN SPECTRA AGGREGATION Physical and Theoretical Chemistry Chemistry photophysic properties Relaxation (NMR) Nanosecond Internal conversion (chemistry) Surfaces Coatings and Films Electronic Optical and Magnetic Materials phthalocyanine General Energy Excitation |
| Zdroj: | Journal of physical chemistry. C 119 (2015): 20256–20264. doi:10.1021/acs.jpcc.5b04978 info:cnr-pdr/source/autori:Iagatti, Alessandro; Doria, Sandra; Marcelli, Agnese; Angelini, Nicola; Notarantonio, Sara; Paoletti, Anna Maria; Pennesi, Giovanna; Rossi, Gentilina; Zanotti, Gloria; Calogero, Giuseppe; Foggi, Paolo/titolo:Photophysical Processes Occurring in a Zn-phthalocyanine in Ethanol Solution and on TiO2 Nanostructures/doi:10.1021%2Facs.jpcc.5b04978/rivista:Journal of physical chemistry. C/anno:2015/pagina_da:20256/pagina_a:20264/intervallo_pagine:20256–20264/volume:119 |
| DOI: | 10.1021/acs.jpcc.5b04978 |
| Popis: | The photophysics of 9(19),16(17),23(24)-tri-tert-butyl-2-[ethynyl-(4-carboxymethyl)phenyl] phthalocyaninatozinc(II) (ZnPc) in solution and adsorbed on TiO2 and ZrO2 nanoparticle films is characterized by stationary and time-resolved spectroscopies in the subpicosecond to nanosecond time interval. The comparison between the solution and the solid substrate data allows us to identify different pathways of the energy and electron relaxation. On the solid substrate, the presence of H-aggregates adds a further nonradiative deactivation channel competing with the charge injection into the Ti-2-conducting band, thus providing an explanation of the reduced efficiency of the charge transfer processes. The comparison between the kinetics recorded after excitation of the S-0-S-2 transition and those recorded after excitation of the S-0-S-1 transition provides an estimate of the internal conversion between S-2 and S-1 which occurs very efficiently and on an ultrafast ( |
| Databáze: | OpenAIRE |
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