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Wash-free fluorescence imaging process has intrinsic nature of monitoring biochemical process in real time fashion and enable us to get more insight on living organism. In this contribution, it was proved that boronic acid derived salicylidenehydrazone complexes (BSs) are suitable candidates for wash-free fluorescence labels. Through pre-installation of organelles' targeting group morpholine and triphenylphosphonium (TPP+) on phenyboronic acid and then assembly it with salicylidenehydrazone ligand by dehydration and dative N-B bond, Lyso-BS and Mito-BS were acquired, which were shown to selectively stain lysosomes and mitochondria with circumventing tedious wash-off procedures in Hela cells respectively, without inducing any appreciable cytotoxicity. Our findings indicate that BSs are potential candidates as wash-free fluorescent stains.
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