title: Hydrogen bonding effects on the surface structure and photoelectrochemical properties of nanostructured SnO2 electrodes modified with porphyrin and fullerene composites.
abstract: Hydrogen bonding effects on surface structure, photophysical properties, and photoelectrochemistry have been examined in a mixed film of porphyrin and fullerene composites with and without hydrogen bonding on indium tin oxide and nanostructured SnO2 electrodes. The nanostructured SnO2 electrodes modified with the mixed films of porphyrin and fullerene composites with hydrogen bonding exhibited efficient photocurrent generation compared to the reference systems without hydrogen bonding. Atomic force microscopy, infrared reflection absorption, and ultraviolet-visible absorption spectroscopies and time-resolved fluorescence lifetime and transient absorption spectroscopic measurements disclosed the relationship between the surface structure and photophysical and photoelectrochemical properties relating to the formation of hydrogen bonding between the porphyrins and/or the C60 moieties in the films on the electrode surface. These results show that hydrogen bonding is a highly promising methodology for the fabrication of donor and acceptor composites on nanostructured semiconducting electrodes, which exhibit high photoelectrochemical properties.
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan. imahori@scl.kyoto-u.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Imahori
authors.forename: Jia-Cheng
authors.initials: JC
authors.lastname: Liu
authors.forename: Hiroki
authors.initials: H
authors.lastname: Hotta
authors.forename: Aiko
authors.initials: A
authors.lastname: Kira
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Umeyama
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Matano
authors.forename: Guifeng
authors.initials: G
authors.lastname: Li
authors.forename: Shen
authors.initials: S
authors.lastname: Ye
authors.forename: Marja
authors.initials: M
authors.lastname: Isosomppi
authors.forename: Nikolai V
authors.initials: NV
authors.lastname: Tkachenko
authors.forename: Helge
authors.initials: H
authors.lastname: Lemmetyinen
mesh_terms: D004563:Electrochemistry; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D018625:Microscopy, Atomic Force; D036103:Nanotechnology; D011166:Porphyrins / Q000737:chemistry*; D013499:Surface Properties; D017971:Tin Compounds / Q000737:chemistry*
chemical_list: D037741:Fullerenes; D011166:Porphyrins; D017971:Tin Compounds; C045358:stannic oxide