Luminescent bi-metallic fluoroborate derivatives of bulky salen ligands

abstract

A family of hemisalen fluoroborate complexes has been prepared and characterized. These new fluorophores exhibit an intense blue emission upon irradiation with UV light. Interestingly, the introduction of bulky aromatic substituents enhanced the quantum yield considerably, up to 44%. Upon studying various solvents, it appeared that the effect of the phenyl substituents is more of electron donating nature than of restricting the intramolecular motion of the dyes.

keywords

NEUTRON-CAPTURE THERAPY; FLUORESCENT-PROBE; BORON COMPLEXES; MACROCYCLES; CHEMISTRY; NITROGEN; CELLS; IONS

subject category

Chemistry

authors

Guieu, S; Cardona, F; Rocha, J; Silva, AMS

our authors

acknowledgements

Thanks are due to the University of Aveiro and the Portuguese Fundacao para a Ciencia e a Tecnologia (FCT), EU, QREN, FEDER and COMPETE for funding the Organic Chemistry Research Unit (project PEst-C/QUI/UI0062/2013), the CICECO Associate Laboratory (PEst-C/CTM/LA0011/2013) and the Portuguese National NMR Network (RNRMN). SG also thanks the FCT for a postdoctoral grant (SFRH/BPD/70702/2010).

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