Details

Autor(en) / Beteiligte

• Makarov, Sergey G.
• Piskunov, Alexander V.
• Suvorova, Olga N.
• Schnurpfeil, Günter
• Domrachev, Georgiy A.
• Wöhrle, Dieter

Titel

Near-Infrared Absorbing Ligand-Oxidized Dinuclear Phthalocyanines

Ist Teil von

• Chemistry : a European journal, 2007-01, Vol.13 (11), p.3227-3233

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2007

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Ligand‐oxidized annulated dinuclear phthalocyanine zinc(II) and lithium(I) complexes absorbing in the NIR region (λ=1000–2200 nm) with high extinction coefficients are described. Analogous mononuclear Pc complexes were used for comparison. The oxidized Pcs were characterized in solution by electronic absorption, EPR and NMR spectra. The NIR transitions were explained by using MO diagrams calculated semiempirically. The reversible oxidation behavior of the phthalocyanine complexes was also estimated by cyclic voltammetry. These new extremely long wavelength absorbing phthalocyanines are interesting as materials with new electronic properties. Dinuclear phthalocyanines with NIR absorptions: Ring‐oxidized annulated dinuclear phthalocyanine zinc(II) and lithium(I) complexes (see figure) absorbing in the NIR region with very high extinction were investigated: the first oxidation with absorptions at ≈1050 and ≈2200 nm, the second oxidation with absorptions at ≈1200 nm. The investigations are accompanied by EPR and NMR spectroscopy, and cyclic voltammetry.