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Communication
Org. Biomol. Chem., 2008, 6, 2256 - 2258, DOI: 10.1039/b804369h
The nature of the sensitiser substituent determines quenching sensitivity and protein affinity and influences the design of emissive lanthanide complexes as optical probes for intracellular use
Filip Kielar, Ga-Lai Law, Elizabeth J. New and David Parker
Introduction of different substituents at the 7-position of a sensitising azaxanthone group in a series of emissive Eu and Tb complexes can determine the intracellular uptake and distribution profile and may be linked to modulation of protein affinity.

