title: Strongly Phosphorescent Iridium(III)-Porphyrins - New Oxygen Indicators with Tuneable Photophysical Properties and Functionalities.
abstract: Synthesis and characterization of four iridium(III)-octaethylporphyrins and a π-extended iridium(III)-benzoporphyrin are presented. Strong room-temperature phosphorescence was observed for all of the complexes with quantum yields of up to 30 %. Axial ligands were introduced to tune the photophysical properties and the solubility. Complexes bearing lipophilic ligands such as pyridine or N-(n-butyl)imidazole were incorporated into polystyrene to obtain optical oxygen sensors. Covalent coupling of the dye is possible by introduction of ligands with binding domains (1-imidazoleacetic acid). This enabled preparation of a water-soluble oxygen probe (by staining bovine serum albumin) and a trace oxygen sensor (by coupling to amino-modified silica gel).
authors.affiliation: Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology Stremayrgasse 9, 8010 Graz, Austria, /873-32502  E-mail:  sergey.borisov@tugraz.at.
authors.forename: Klaus
authors.initials: K
authors.lastname: Koren
authors.forename: Sergey M
authors.initials: SM
authors.lastname: Borisov
authors.forename: Robert
authors.initials: R
authors.lastname: Saf
authors.forename: Ingo
authors.initials: I
authors.lastname: Klimant