Lanthanide-based luminescent complexes have advantages over organic fluorophores and quantum dots due to their sharp emission bandwidths, long luminescence lifetimes (μs-ms range) and strong resistance to photobleaching. For biological applications, a synthetic challenge for the synthesis of lanthanide-based luminescent complexes is to design a protective ligand framework to yield complexes that are highly soluble in aqueous solution, can be excited by low-energy light sources, and exhibit high luminescent intensity. The metallacrown (MC) motif is an innovative strategy to synthesize lanthanide complexes that allows for achieving the above-mentioned requirements. Recent investigations into the use of salicylhydroximate as bridging ligands have resulted in new metallacrowns with outstanding luminescent properties. Herein we report several new series of lanthanide MC complexes with the general formula [Ln2Ga8(shi)8(isophthalate)4]. The syntheses and photophysical properties of these complexes will be discussed.

Highly luminescent Ga8Ln2 metallacrown complexes

251st National Meeting (2016)

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