title: A study of acridine and acridinium-substituted bis(terpyridine)zinc(II) and ruthenium(II) complexes as photosensitizers for O2 (1Δg) generation.
abstract: The homoleptic zinc(II) and ruthenium(II) metal complexes of bis(tridentate) 9-acridine and 10-methyl-9-acridinium-substituted terpyridines were tested for their suitability as triplet photosensitizers (PS) using the photooxidation of 1,5-dihydroxynaphthalene (DHN) to Juglone as a model reaction. Singlet oxygen (O2(1)Δg) generation is superior or comparable to Ru(bpy)3(2+) for the acridine complexes, whereas the acridinium complexes are ineffective. The molecular structure of the bis(9-(5-([2,2':6',2''-terpyridin]-4'-yl)thien-2-yl)-10-methylacridinium)zinc(II) complex ([Zn(MeATT)2][PF6]4) is determined by X-ray structure analysis, whereas for other complexes DFT calculations were performed for structural parameters to obtain insights into their electronic properties.
authors.affiliation: Organische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, 33501 Bielefeld, Germany. mattay@uni-bielefeld.de jens.eberhard@uni-bielefeld.de.
authors.forename: Jens
authors.initials: J
authors.lastname: Eberhard
authors.forename: Katrin
authors.initials: K
authors.lastname: Peuntinger
authors.forename: Susann
authors.initials: S
authors.lastname: Rath
authors.forename: Beate
authors.initials: B
authors.lastname: Neumann
authors.forename: Hans-Georg
authors.initials: HG
authors.lastname: Stammler
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Guldi
authors.forename: Jochen
authors.initials: J
authors.lastname: Mattay
mesh_terms: D000166:Acridines / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D055668:Photochemical Processes; D017319:Photosensitizing Agents / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D026082:Singlet Oxygen / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D000166:Acridines; D056831:Coordination Complexes; D017319:Photosensitizing Agents; D011725:Pyridines; D026082:Singlet Oxygen; D012428:Ruthenium; D015032:Zinc