Pang Shukui,Yu Yanchao,Yan Xuexue,Wu Mianyuan,Liu Qiye,Zu Panru,Wu Canyao
A novel coumarinylhydrazone fluorescent probe L was designed and synthesized from 4-(diethylamino)salicylaldehyde, its structure was characterized by NMR, IR. Fluorescence emission spectra showed that in ethanol solution, probe L could form a 1:1 complex L-Cu 2+ with Cu 2+ to realize the "turn-off" detection of Cu 2+ with high specificity and sensitivity (3.7 × 10 –7 mol/L). Meanwhile, the complex L-Cu 2+ had a specific fluorescence-enhanced response to HPO 4 2− with a detection limits down to 5.6 × 10 –7 mol/L and was resistant to the effects of many common anions (NO 2 − , N 3 − , CO 3 2− , SO 3 2− , HPO 4 2− , I − , Br − , F − , HCO 3 − , SO 4 2− , NO 3 − , Cl − , CH 3 COO − , Cr 2 O 7 2− , S 2 O 3 2− , P 2 O 7 4− ). Detection mechanism could be HPO 4 2− captured Cu 2+ of the complex and released the free ligand L. At last, the complex L-Cu 2+ was successfully applied to the determination of HPO 4 2− in different environmental water samples, and the spiked recoveries ranged from 98.05% to 108.18% and the relative standard deviations of 0.75% ~ 2.9%, which had good application prospects. Graphical A new coumarin acyl hydrazone fluorescent probe L was designed and synthesized, which could specifically recognize Cu2+ and HPO42- in a relay manner. In addition, the probe had good prospects for practical applications.
Renjie Liu,Xu Tang,Yun Wang,Juan Han,Huiqin Zhang,Chen Li,Wenli Zhang,Liang Ni,Haoran Li
A novel fluorescent probe XDS based on 4-methylumbelliferone and 2-picolylamine platforms has been designed and synthesized, which behaves fast relay recognition of Fe 3+ and PO 4 3− via a fluorescence “on−off−on” response signal. Probe XDS exhibited very high sensitivity and unique selectivity for Fe 3+ over other common metal ions , and the detection limit of was 3.2 × 10 −7 M. Moreover, the addition of the PO 4 3− ions could cause the recovery of fluorescence. This relay recognition feature of probe XDS has potential applications in the determination of trace amount of Fe 3+ and PO 4 3− in environmental systems. Interestingly, fluorescence imaging experiments demonstrated that the probe XDS can also be used to monitoring the intracellular Fe 3+ in RAMOS cells.
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