Journal
INORGANIC CHEMISTRY
Volume 50, Issue 19, Pages 9465-9471Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic201143f
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Funding
- Hong Kong Research Grants Council [CityU 102109]
- City University of Hong Kong [7002679]
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We present the synthesis, characterization, and photophysical properties of three luminescent rhenium(I) polypyridine fluorous complexes [Re(Me(2)bpy)(CO)(3)(L)](PF6) (Me(2)bpy = 4,4'-dimethyl-2,2'-bipyridine; L = 3-amino-5-(N-((3-perfluorooctyl)propyl)aminocarbonyl)pyridine (py-Rf-NH2) (1), 3-isothiocyanato-5-(N-((3-perfluorooctyl)propyl)aminocarbonyl)pyridine (py-Rf-NCS) (2), 3-ethylthioureidyl-5-(N-((3-perfluorooctyl)propyl)aminocarbonyl)pyridine (py-Rf-TU-C2H5) (3)). The isothiocyanate complex 2 has been used to label bovine serum albumin (BSA) and glutathione (GSH). The photophysical properties of the resultant bioconjugates have been studied. The isolation of the luminescent fluorous rhenium-GSH conjugate from a mixture of 20 amino acids has been demonstrated using fluorous solid-phase extraction (FSPE). Additionally, the cytotoxicity of complexes 1 and 3 toward HeLa cells has been examined by the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide (MTT) assay. The cellular uptake properties of complex 3 have also been investigated by laser-scanning confocal microscopy.
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