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Title: | Photophysicalcharacterisation of some dipyrromethenedyes in ethylacetate and covalentlybound to poly(methyl methacrylate |
Authors: | Susdorf, T.; Álvarez, M.; Holzer, W.; Penzkofer, A.; Amat-Guerri, Francisco CSIC; Liras, Marta CSIC ORCID CVN; Costela González, Ángel CSIC ORCID; Garcia-Moreno, I. CSIC ORCID; Sastre, Roberto | Keywords: | Dipyrromethene dyes Dipyrromethene dyes covalently bound to PMMA Absorption spectroscopy Fluorescence spectroscopy Saturable absorption Excited-state absorption Photo-degradation |
Issue Date: | 2005 | Publisher: | Elsevier | Citation: | Chemical Physics 312 : 151–158 (2005) | Abstract: | Analogues of the dipyrromethene-BF2 dye PM567 modified at the 8-position by acetoxymethyl (P1Ac), s-acetoxypentyl (P5Ac), and p-acetoxymethylphenyl (PAr1Ac) groups are studied in ethyl acetate solution. PM567 modified at the 8-position by methacryloyloxymethyl (P1MA), s-methacryloyloxypentyl (P5MA), and p-methacryloyloxymethylphenyl (PAr1MA) groups have been copolymerized with methyl methacrylate (MMA), and these solid samples are also studied. The absorption cross-section and stimulated emission cross-section spectra are determined. The fluorescence quantum distributions and fluorescence lifetimes are measured. Saturable absorption measurements with picosecond laser excitation are carried out for excited-state absorption crosssection determination at the excitation wavelength. The photo-degradation of the dyes is studied under cw laser excitation conditions and quantum yields of photo-degradation are extracted. | Publisher version (URL): | http://dx.doi.org/10.1016/j.chemphys.2004.11.035 | URI: | http://hdl.handle.net/10261/59868 | DOI: | 10.1016/j.chemphys.2004.11.035 | ISSN: | 0301-0104 |
Appears in Collections: | (ICTP) Artículos (IQF) Artículos (IQOG) Artículos |
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