Development of low-cost copper nanoclusters for highly selective “turn-on” sensing of Hg2+ ions

An Indole‐based Chromofluorogenic Probe for Detection of Trivalent Al3+, Ga3+, In3+ and Fe3+ Ions

“…As a part of our ongoing research in the design and development of new optical probes, [58][59][60][61][62][63][64][65] herein we present an easily synthesizable indole-based chromofluorogenic Schiff base probe (InNS; Figure 1(a)) for recognition of trivalent Al 3 + , Ga 3 + , In 3 + and Fe 3 + ions over other mono-and bivalent cationic species. In this probe, the indole moiety acted as a fluorophore while a combination of both hard (imine-N) and soft (À SÀ ) donor sites served as the metal ion recognition unit.…”

Turn-on detection of Al3+ ions using quinoline-based tripodal probe: mechanistic investigation and live cell imaging applications

“…Al 3+ is a hard acid that preferentially coordinates with the receptors comprising hard donor bases such as imine-N, amine-N, and -OH. 48–50 Along these lines, the probe TQSB has been integrated with the hard donor quinoline, imine and amine nitrogen atoms to provide an extraordinary coordination sphere for the selective detection of Al 3+ ions over other metal ions. 51,52 The coordination of Al 3+ with the probe restricts the PET effect and CN– isomerization and displays a typical CHEF effect to eventually provide a turn-on fluorescence response.…”