Discriminating Detection between Mg²⁺ and Ca²⁺ by Fluorescent Signal from Anthracene Aromatic Amide Moiety

Abstract

Novel fluorescent reagents 1 and 2 were synthesized. In the absence of metal ions, the fluorescence emissions of these compounds were quite weak, but their intensities were much greater in the presence of alkaline earth metal ions. The peak shape and maximum wavelength of the emission of the complex with Mg2+ differed from those of Ca2+ and other alkaline earth metal ions. The peak wavelength difference was 30 nm.

Synthesis, Fluorescence, and Two‐Photon Absorption of Bidentate Phosphane Oxide Derivatives: Complexation with Pb2+ and Cd2+ Cations

“…The pseudocyclic structure increases the binding force and plays important roles not only in artificial ionophores but also in natural ionophores for the selective binding of metal ions 12. Among the early reports on acyclic polyether‐based chemosensors, reported by Nakamura et al and Ajayaghosh et al, the signaling of the binding event was achieved by excimer formation,10d exciton interaction,8b,8c,10e twisted intramolecular charge transfer (TICT)8a,8e process, and electron10a or energy transfer10b process between two terminal chromophore units. None of the systems utilize the well‐established photoinduced electron transfer (PET) process,1c which can operate in a single chromophore unit.…”

Substituted Position Effect on Twisted intramolecular Charge Transfer of 1- and 2-anthracene aromatic Carboxamides as Chemosensors Based on Linear Polyether

“…[26][27][28][29][30][31][32][33][34] We also found that the fluorescence emissions of the N-phenyl-9-anthracenecarbox-amide unit (9-aa) and its derivatives (94 and 95) (Fig. 1) were almost quenched in solution.…”

Design and Applications of Small Molecular Probes for Calcium Detection

“…Nakamura et al. reported a fluorescent probe 54 which distinguishes Ca 2+ and Mg 2+ ions by fluorescence technique (Figure ) . In fluorescence, free 54 showed very weak exciplex emission at 460 nm due to anthracene and benzene units.…”