Bartosz Kalota

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Journal of Applied Spectroscopy 2020

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ID:
9
Authors:
Mikhail P. Tsvirko, Bartosz Kalota, Agnieszka Mikus, Stanisław Ostrowski
Title:

Structure and luminescence properties of lutetium(III) complexes with 5,10,15,20-tetraphenylporphine and its derivatives

Journal:
Journal of Applied Spectroscopy
Publisher:
Springer
Year:
2020
Volume:
87
Pages:
789–795
Citation:
M. P. Tsvirko, B. Kalota, A. Mikus, S. Ostrowski, Structure and luminescence properties of lutetium(III) complexes with 5,10,15,20-tetraphenylporphine and its derivatives, J. Appl. Spectrosc., 2020, 87, 789–795.
Abstract:

The spectral and luminescent properties of new complexes of lutetium(III)–chloride with 5,10,15,20-tetraphenylporphine and its mono-nitrophenyl derivative with a para-nitro group on one of the meso-phenyl rings were studied. The complexes showed weak fluorescence (φfl = 5·10–4) and moderate phosphorescence (φphosph = 3·10–2) at 77 K and phosphorescence at room temperature. The type of extra ligand (monodentate chloride and bidentate acetylacetonate) and the presence of an electron-withdrawing NO2 group on the meso-phenyl ring did not have an appreciable effect on the photophysics of the Lu(III)-porphyrins. The phosphorescence spectra of the complexes were shifted to the long-wavelength region. The phosphorescence lifetimes were longer (2800–3100 μs) than those of the known oxygen sensors Pt(II)- or Pd(II)-porphyrins. The oxygen determination limit in solution was estimated from quenching of the Lu(III)-porphyrin phosphorescence.