This reactive recognition mechanism was confirmed using mass spectroscopic analysis (Figure 35). Gunnlaugsson et al. used the “fluorophore–spacer–receptor” format in compounds 24–26 to obtain fluorescent probes for the visualization of microdamage in bones such as cracks and scratches 98. Probes 24–26 possessed phenyliminodiacetate as a receptor unit that can bind Ca2+ ions selectively and completely …
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