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Published May 6, 2013 | Supplemental Material
Journal Article Open

Decorating Metal Oxide Surfaces with Fluorescent Chlorosulfonated Corroles


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–TiO_2 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–TiO_2 and 1-Ga–TiO_2 suggest a promising application of these NP conjugates as contrast agents for noninvasive optical imaging.

Additional Information

© 2013 American Chemical Society. Received: February 16, 2013; published: April 23, 2013. Due to a production error, this paper was published ASAP on April 23, 2013, with minor errors in the caption for Figure 1. The corrected version was reposted on April 24, 2013. We thank the CHLA Radiology Endowment Fund, Sanofi, and Doheny Eye Institute for financial support. We thank Esteban Fernandez, George Rossman, Bruce Brunschwig, Zeev Gross, and Michael Lichterman for their help and discussion on this work. We thank Mona Shahgholi (CCE Division Multiuser Mass Spectrometry Lab at Caltech) for her help with electrospray ionization mass spectrometry experiments.

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