title: Nanostructured 2D Diporphyrin Honeycomb Film: Photoelectrochemistry, Photodegradation, and Antibacterial Activity.
abstract: Surface patterns of well-defined nanostructures play important roles in fabrication of optoelectronic devices and applications in catalysis and biology. In this paper, the diporphyrin honeycomb film, composed of titanium dioxide, protoporphyrin IX, and hemin (TiO2/PPIX/Hem), was synthesized using a dewetting technique with the well-defined polystyrene (PS) monolayer as a template. The TiO2/PPIX/Hem honeycomb film exhibited a higher photoelectrochemical response than that of TiO2 or TiO2/PPIX, which implied a high photoelectric conversion efficiency and a synergistic effect between the two kinds of porphyrins. The TiO2/PPIX/Hem honeycomb film was also a good photosensitizer due to its ability to generate singlet oxygen ((1)O2) under irradiation by visible light. This led to the use of diporphyrin TiO2/PPIX/Hem honeycomb film for the photocatalytic inactivation of bacteria. In addition, the photocatalytic activities of other metal-diporphyrin-based honeycomb films, such as TiO2/MnPPIX/Hem, TiO2/CoPPIX/Hem, TiO2/NiPPIX/Hem, TiO2/CuPPIX/Hem, and TiO2/ZnPPIX/Hem, were investigated. The result demonstrated that the photoelectric properties of diporphyrin-based film could be effectively enhanced by further coupling of porphyrin with metal ions. Such enhanced performance of diporphyrin compounds opened a new way for potential applications in various photoelectrochemical devices and medical fields.
authors.affiliation: Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Yuewu
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Qiuwei
authors.initials: Q
authors.lastname: Shang
authors.affiliation: Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Jiachao
authors.initials: J
authors.lastname: Yu
authors.affiliation: Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Yuanjian
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Songqin
authors.initials: S
authors.lastname: Liu
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D004563:Electrochemistry; D004926:Escherichia coli / Q000187:drug effects; D008027:Light; D049329:Nanostructures / Q000737:chemistry*; D010782:Photolysis / Q000187:drug effects*; D011137:Polystyrenes / Q000737:chemistry / Q000494:pharmacology; D011166:Porphyrins / Q000737:chemistry / Q000494:pharmacology*; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D011137:Polystyrenes; D011166:Porphyrins; C009495:titanium dioxide; D014025:Titanium
keywords: antibacterial activity; diporphyrin; photoelectrochemistry; singlet oxygen; synergistic effect; template synthesis