AzuFluor® 435-DPA-Zn, an azulene fluorophore bearing two zinc(ii)-dipicolylamine receptor motifs, exhibits fluorescence enhancement in the presence of adenosine diphosphate. Selectivity for ADP over ATP, AMP and PPi results from appropriate positioning of the receptor motifs, since an isomeric sensor cannot discriminate between ADP and ATP.
We thank EPSRC for IAA funding (EP/R51164X/1) and for DTG PhD studentships to L. C. M. and J. L. H. We are grateful for PhD funding to C. M. L.-A. from the EU Horizon 2020 research and innovation programme under grant agreement H2020-MSCA-CO-FUND, #665992. T. D. J. wishes to thank the Royal Society for a Wolfson Research Merit Award and the Open Research Fund of the School of Chemistry and Chemical Engineering, Henan Normal University for support (2020ZD01). The British-Spanish Society and Plastic Energy are thanked for a 2017 Scholarship to C.M.L.-A. The authors acknowledge the Material and Chemical Characterisation Facility (MC2) at University of Bath (doi:10.15125/mx6j-3r54). H. M. K. acknowledges the grants from the National Research Foundation of Korea (2019R1A2B5B03100278 and 2019R1A5A2026045).
