Proton-linked bi- and tri-metallic gold cyanide complexes observed by ESI-MS spectrometry

A Selective, Sensitive, and Chromogenic Chemodosimeter for Cyanide Based on the 1,1′-Binaphthyl Scaffold

“…The maximum fluorescence intensity was observed when 0.25 equiv of Au 3+ was present, and a further increase in the concentration of Au 3+ led to no further fluorescence enhancement, which demonstrated a 1:4 stoichiometry for Au 3+ and 2 . This ratio was also supported by 1 H NMR titration experiments and negative-ion ESI mass spectrometry analysis (Figures S35 and S36, Supporting Information). The corresponding detection limit was determined to be 0.5 μM (98.5 ppb) (Figure S37, Supporting Information).…”