title: Nonprecious-metal-assisted photochemical hydrogen production from ortho-phenylenediamine.
abstract: The combination of o-phenylenediamine (opda), which possesses two proton- and electron-pooling capability, with Fe(II) leads to the photochemical hydrogen-evolution reaction (HER) in THF at room temperature without addition of photosensitizers. From the THF solution, the tris(o-phenylenediamine) iron(II) complex, [Fe(II)(opda)3](ClO4)2 (1), was isolated as a photoactive species, while the deprotonated oxidized species was characterized by X-ray crystallographic analysis, electrospray ionization mass spectrometry, and UV-vis NIR spectra. Furthermore, the HER is photocatalyzed by hydroquinone, which serves as a H(+)/e(-) donor. The present work demonstrates that the use of a metal-bound aromatic amine as a H(+)/e(-) pooler opens an alternative strategy for designing nonprecious-metal-based molecular photochemical H2 production/storage materials.
authors.affiliation: Center for Strategic Utilization of Elements, Faculty of Science, Hokkaido University, North-10, West-8, Sapporo 060-0810, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Ho-Chol
authors.initials: HC
authors.lastname: Chang
authors.forename: Masanori
authors.initials: M
authors.lastname: Wakizaka
authors.forename: Sho
authors.initials: S
authors.lastname: Ueno
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kobayashi
authors.forename: Akira
authors.initials: A
authors.lastname: Nakayama
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Taketsugu
authors.forename: Masako
authors.initials: M
authors.lastname: Kato
mesh_terms: D004583:Electrons; D005296:Ferrous Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification; D006859:Hydrogen / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010655:Phenylenediamines / Q000737:chemistry*; D055668:Photochemical Processes; D011522:Protons; D011789:Quantum Theory
chemical_list: D005296:Ferrous Compounds; D010655:Phenylenediamines; D011522:Protons; D006859:Hydrogen; C034193:1,2-diaminobenzene