Probe 1 shows almost insignificant fluorescence enhancement when exposed to F – , I – , double-stranded (ds) DNA, single-stranded (ss) DNA, glucose, heme, UTP, TTP, ATP, GTP and CTP ( Fig. 2c ), indicating the high selectivity of naphthalene-based probe 1 towards recognition of tRNA and denatured tRNA over other anions and nucleotides.
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