Abstract
Abstract Rhodol is an ideal platform for fluorescent probes owing to its spirolactone framework and excellent photochemical properties. Herein, a novel rhodol-based colorimetric and fluorescent turn-on probe, DER-1, for the detection of Pd0, was rationally developed with an allyl carbamate group as the response unit. Base on the Pd0-triggered cleavage reaction and rhodol spiroring-opening mechanism, the proposed probe exhibited a high selectivity and sensitivity towards Pd0. Upon addition of Pd(PPh3)4, a significant fluorescence enhancement at 547 nm was observed with an obvious color change from colorless to pink, which can be easily identified by naked-eye. In addition, the fluorescence intensity at 547 nm was linearly proportional to the concentration of Pd0 in the range of 0–1.5 μM, and the detection limit was calculated to be 1.14 nM. That is, probe DER-1 can be quite a sensitive fluorescent turn-on probe for the quantitative detection of Pd0 in pretty low dose.
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