title: Synthesis, electrochemical and photophysical properties of covalently linked porphyrin-polyoxometalates.
abstract: Two covalently linked porphyrin-polyoxometalate hybrids have been prepared: an Anderson-type hexamolybdate [N(C(4)H(9))(4)](3)[MnMo(6)O(18){(OCH(2))(3)CNHCO(ZnTPP)}(2)] with two pendant zinc(II)-tetraphenylporphyrins, and a Dawson-type vanadotungstate [N(C(4)H(9))(4)](5)H[P(2)V(3)W(15)O(59){(OCH(2))(3)CNHCO(ZnTPP)}] with one porphyrin. Electrochemical studies show independent redox processes for the organic and inorganic parts at usual potentials. Photophysical studies reveal an electron transfer from the excited porphyrin to the Dawson polyoxometalate, but not to the Anderson polyoxometalate. Time resolved absorption spectroscopy allows the identification of the electron transfer pathways and the determination of the time constants.
authors.affiliation: UPMC Univ. Paris 06, Institut de Chimie Moléculaire, UMR CNRS 7071, 4 place Jussieu, 75005 Paris, France.
authors.forename: Clémence
authors.initials: C
authors.lastname: Allain
authors.forename: Delphine
authors.initials: D
authors.lastname: Schaming
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Karakostas
authors.forename: Marie
authors.initials: M
authors.lastname: Erard
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Gisselbrecht
authors.forename: Sébastien
authors.initials: S
authors.lastname: Sorgues
authors.forename: Isabelle
authors.initials: I
authors.lastname: Lampre
authors.forename: Laurent
authors.initials: L
authors.lastname: Ruhlmann
authors.forename: Bernold
authors.initials: B
authors.lastname: Hasenknopf
mesh_terms: D055664:Electrochemical Techniques; D015394:Molecular Structure; D055668:Photochemical Processes; D011166:Porphyrins / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D011166:Porphyrins; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates