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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, Liras, Marta, Costela, A., Garcia-Moreno, I., Sastre, Roberto
Keywords: Dipyrromethene dyes
Dipyrromethene dyes covalently bound to PMMA
Absorption spectroscopy
Fluorescence spectroscopy
Saturable absorption
Excited-state absorption
Issue Date: 2005
Publisher: Elsevier
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.
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ISSN: 0301-0104
???metadata.dc.identifier.doi???: 10.1016/j.chemphys.2004.11.035
Citation: Chemical Physics 312 : 151–158 (2005)
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