Journal
RSC ADVANCES
Volume 5, Issue 65, Pages 52516-52521Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra06144j
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Funding
- National Natural Science Foundation of China [21277046, 21173077, 21377038]
- Shanghai Committee of Science and Technology [13NM1401000]
- Research Fund of Education of the People's Republic of China [JPPT-125-4-076]
- National Basic Research Program of China (973 Program) [2013CB632403]
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Developing probes for selective and sensitive detection of palladium in living organisms is of great importance. In this work, we synthesized a colorimetric and ratiometric fluorescent probe (Probe 1) with red light emission (lambda(em) = 643 nm) by employing an isophorone based fluorescent dye as the fluorophore and an allylcarbamate group as the response unit. Based on the Pd-0-triggered cleavage reaction, Probe 1 showed high response speed, selectivity, and sensitivity towards palladium species. Upon addition of palladium, the absorption and emission spectra of Probe 1 exhibited obvious red-shifts, which can be easily discriminated by the naked eye. In terms of palladium, the detection limit is as low as 24.2 nM and the signal-to-noise ratio in fluorescence intensity can reach 85-fold. As a red emitting ratiometric sensor, Probe 1 can be potentially used for quantitative detection of palladium in living organisms.
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