Anthracene as bulky linker: Changing the steric demand of the linker between two dicationic BAr2 groups leads to water-soluble and water-stable quadrupolar tetracationic cell-imaging agents. With anthracene as the linker, stability as well as π-conjugation between the two boron π-acceptors was achieved, resulting in a very high fluorescence quantum yield in water (0.86). Furthermore, its use as a lysosomal imaging agent was demonstrated. More information can be found in the Full Paper by S. Yamaguchi, T. B. Marder et al. on page 7679.