Shining brightly: The synthesis, characterisation and photophysical behaviour of two new luminescent dendrimers based on ruthenium(II) dyes, carrying 32 positive (1) or 32 negative (2) charges, is described. The combination of stoichiometric control and the absence of self-quenching of the ruthenium dyes results in a maximum increase in the fluorescence of the dendrimer corresponding to the number of substituents, and offers a straightforward and promising approach to the realisation of very bright labels.
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