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Exfoliation of Graphene by Dendritic Water‐Soluble Zinc Phthalocyanine Amphiphiles in Polar Media
Author(s) -
Methfessel Christian D.,
Volland Michel,
Brunner Kristin,
Wibmer Leonie,
Hahn Uwe,
de la Torre Gema,
Torres Tomás,
Hirsch Andreas,
Guldi Dirk M.
Publication year - 2018
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.201803596
Subject(s) - exfoliation joint , phthalocyanine , raman spectroscopy , graphene , amphiphile , carboxylate , sonication , covalent bond , zinc , materials science , absorption (acoustics) , methanol , absorption spectroscopy , photochemistry , chemical engineering , chemistry , polymer chemistry , organic chemistry , nanotechnology , copolymer , polymer , physics , engineering , quantum mechanics , optics , composite material
Two zinc phthalocyanines (ZnPcs) have been equipped with Newkome‐type dendritic branches of increasing size and number of terminal carboxylate functional groups. The negatively charged carboxylates render these polyelectrolytes soluble in polar media such as methanol or buffered water. Sonication of the ZnPcs with graphene allowed for pronounced non‐covalent binding of the ZnPc moieties on the graphene surface. These hybrid systems were fully characterized via UV/Vis, AFM, TEM, Raman and transient absorption spectroscopy, yielding insights into the electron donating nature of the novel phthalocyanine structures.