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Near‐Infrared Absorbing Ligand‐Oxidized Dinuclear Phthalocyanines
Author(s) -
Makarov Sergey G.,
Piskunov Alexander V.,
Suvorova Olga N.,
Schnurpfeil Günter,
Domrachev Georgiy A.,
Wöhrle Dieter
Publication year - 2007
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200601164
Subject(s) - phthalocyanine , ligand (biochemistry) , electron paramagnetic resonance , absorption (acoustics) , cyclic voltammetry , photochemistry , extinction (optical mineralogy) , chemistry , zinc , absorption spectroscopy , near infrared spectroscopy , molar absorptivity , lithium (medication) , materials science , analytical chemistry (journal) , electrochemistry , nuclear magnetic resonance , organic chemistry , electrode , optics , mineralogy , biochemistry , physics , receptor , composite material , medicine , endocrinology
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.