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Electrostatic Complexation and Photoinduced Electron Transfer between Zn‐Cytochrome c and Polyanionic Fullerene Dendrimers
Author(s) -
Braun Martin,
Atalick Stefan,
Guldi Dirk M.,
Lanig Harald,
Brettreich Michael,
Burghardt Stephan,
Hatzimarinaki Maria,
Ravanelli Elena,
Prato Maurizio,
van Eldik Rudi,
Hirsch Andreas
Publication year - 2003
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.200204680
Subject(s) - dendrimer , photoinduced electron transfer , circular dichroism , fullerene , cytochrome c , spectroscopy , electron transfer , ultrafast laser spectroscopy , chemistry , fluorescence , photochemistry , fluorescence spectroscopy , zinc , absorption (acoustics) , crystallography , materials science , polymer chemistry , organic chemistry , biochemistry , physics , quantum mechanics , mitochondrion , composite material
Two dendritic fullerene (DF) monoadducts, 2 and 3 , which can carry up to 9 and 18 negative charges, respectively, were examined with respect to electrostatic complexation with Cytochrome c (Cyt c ). To facilitate comprehensive photophysical investigations, the zinc analogue of Cyt c (ZnCyt c ) was prepared according to a novel, modified procedure. The association of ZnCyt c and DF, and consequential photoinduced electron transfer within ZnCyt c ‐DF from the photoexcited protein to the fullerene, was proven by fluorescence spectroscopy and transient absorption spectroscopy. These findings were also supported by circular dichroism as well as by extensive molecular dynamics (MD) simulations.