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Preparation, Photophysical and Electrochemical Evaluation of an Azaborondipyrromethene/Zinc Porphyrin/Graphene Supramolecular Nanoensemble
Author(s) -
Rotas Georgios,
Thomas Michael B.,
CantonVitoria Ruben,
D'Souza Francis,
Tagmatarchis Nikos
Publication year - 2020
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.202000174
Subject(s) - porphyrin , supramolecular chemistry , raman spectroscopy , graphene , chromophore , photochemistry , photoexcitation , electrochemistry , electron transfer , thermogravimetric analysis , materials science , chemistry , nanotechnology , molecule , organic chemistry , electrode , excitation , physics , electrical engineering , engineering , optics
The preparation of an entirely supramolecular, multichromophoric azaborondipyrromethene ( ABDP )/zinc tetraphenylporphyrin ( ZnTPP )/exfoliated graphene ( GR ) nanoensemble was accomplished. The ABDP derivative bears glycol chains for enhancing solubility and a pyridine functionality for allowing coordination with ZnTPP . The ABDP / ZnTPP/GR nanoensemble was characterized in terms of morphology and composition by using complementary microscopy imaging, thermogravimetric analysis, Raman as well as steady‐state and time‐resolved absorption and emission spectroscopy. The photophysical and electrochemical assessment of ABDP / ZnTPP/GR as well as the binding properties of the ABDP / ZnTPP complex, employed as a reference, are presented. Energy and electron transfer events were observed in ABDP / ZnTPP upon photoexcitation. However, in the case of ABDP / ZnTPP/GR , the graphene‐induced aggregation of the chromophores alters their electronic interactions, enhancing the energy/electron transfer process between them.