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Generation of Photocurrent by Visible‐Light Irradiation of Conjugated Dawson Polyoxophosphovanadotungstate–Porphyrin Copolymers
Author(s) -
Azcarate Iban,
Huo Zhaohui,
Farha Rana,
Goldmann Michel,
Xu Hualong,
Hasenknopf Bernold,
Lacôte Emmanuel,
Ruhlmann Laurent
Publication year - 2015
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.201406178
Subject(s) - porphyrin , photocurrent , copolymer , photochemistry , monomer , x ray photoelectron spectroscopy , spectroscopy , conjugated system , chemistry , polyoxometalate , benzene , visible spectrum , ultraviolet visible spectroscopy , materials science , polymer chemistry , polymer , organic chemistry , catalysis , chemical engineering , engineering , physics , optoelectronics , quantum mechanics
Four hybrid polyoxometalate–porphyrin copolymer films were obtained by the electrooxidation of zinc octaethylporphyrin in the presence of four different Dawson‐type polyoxometalates bearing two pyridyl groups (POM(py) 2 ) with various spacers. The POM monomers were designed around 1,3,5‐trisubstituted benzene rings. Two of the substituents of the benzene ring are linked to the pyridyl groups, and the third is connected to the POM subunit. The four monomers vary in the relative positions of the nitrogen atoms of the pyridine rings or in the distance from the carbonyl group. The monomers were fully characterized by 1 H, 31 P, and 13 C NMR spectroscopy, electrospray mass spectrometry, IR and UV/Vis spectroscopy, and electrochemistry. The copolymers were characterized by UV/Vis spectroscopy, X‐ray photoelectron spectroscopy, electrochemistry, and AFM. Their photovoltaic performance under visible light irradiation was investigated by photocurrent transient measurements under visible illumination.