title: Decorating metal oxide surfaces with fluorescent chlorosulfonated corroles.
abstract: We have prepared 2,17-bis(chlorosulfonyl)-5,10,15-tris(pentafluorophenyl)corrole (1), 2,17-bis(chlorosulfonyl)-5,10,15-tris(pentafluorophenyl)corrolatoaluminum(III) (1-Al), and 2,17-bis(chlorosulfonyl)-5,10,15-tris(pentafluorophenyl)corrolatogallium(III) (1-Ga). The metal complexes 1-Al and 1-Ga were isolated and characterized by electronic absorption and NMR spectroscopies, as well as by mass spectrometry. Relative emission quantum yields for 1, 1-Al, and 1-Ga, determined in toluene, are 0.094, 0.127, and 0.099, respectively. Reactions between 1, 1-Al, and 1-Ga and TiO2 nanoparticles (NPs) result in corrole-TiO2 NP conjugates. The functionalized NP surfaces were investigated by solid-state Fourier transform infrared and X-ray photoelectron spectroscopies and by confocal fluorescence imaging. The fluorescence images for 1-Al-TiO2 and 1-Ga-TiO2 suggest a promising application of these NP conjugates as contrast agents for noninvasive optical imaging.
authors.affiliation: Department of Chemistry, California Institute of Technology, Pasadena, California 91125, United States.
authors.forename: Carl M
authors.initials: CM
authors.lastname: Blumenfeld
authors.forename: Robert H
authors.initials: RH
authors.lastname: Grubbs
authors.forename: Rex A
authors.initials: RA
authors.lastname: Moats
authors.forename: Harry B
authors.initials: HB
authors.lastname: Gray
authors.forename: Karn
authors.initials: K
authors.lastname: Sorasaenee
mesh_terms: D000535:Aluminum / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D005708:Gallium / Q000737:chemistry; D054879:Halogenation; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011166:Porphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D013450:Sulfones / Q000138:chemical synthesis / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D005456:Fluorescent Dyes; D011166:Porphyrins; D013450:Sulfones; C431863:corrole; C009495:titanium dioxide; D005708:Gallium; D000535:Aluminum; D014025:Titanium