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A novel quinoline-functionalized Schiff-base derivative PY was designed and synthesized. Sensor PY displayed highly selective and sensitive fluorescence enhancement and naked-eye color change to Fe3+ in the presence of other competing cations. The mechanisms have been supported by Job’s plot evaluation, FT-MS and theoretical calculations. The in situ generated PY-Fe3+ complex solution exhibited a high selectivity toward PPi via Fe3+ displacement approach. The detection limits of sensor PY to Fe3+ and PY-Fe3+ complex to PPi were estimated to be 4.24 × 10?8 M and 8.18 × 10?8 M, respectively. This successive recognition feature of sensor PY makes it has a potential utility for Fe3+ and PPi detection in aqueous solution. A B3LYP/6-31G(d,p) basis set was employed for optimization of PY and PY-Fe3+ complex. 相似文献
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In this study, we have successfully synthesized a novel coumarin-based dendrons derivative CD and its chemical structure was characterized by 1H NMR, 13C NMR and ESI-HR-MS. The sensor CD showed an obvious “on-off” fluorescence quenching response toward Cu2+ with a maximum quenching efficiency of 99.8%. The CD-Cu2+ complex showed an “off-on” fluorescence enhancement response toward PPi over many competitive anions. The detection limit of the sensor CD was 0.29?×?10?6?M to Cu2+ and 2.39?×?10?9?M to PPi. In addition, the sensor CD showed a 1:1 binding stoichiometry to Cu2+ and the sensor CD-Cu2+ showed a 2:1 binding stoichiometry to PPi in CH3CN/HEPES buffer medium (9:1 v/v, pH?=?7.2). The stable pH range of sensor CD to Cu2+ and CD-Cu2+ to PPi was from 3 to 8. 相似文献
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A coumarin based highly selective fluorescent chemosensor for sequential recognition of Cu2+ and PPi
Xianjiao Meng Duanlin Cao Zhiyong Hu Xinghua Han Zhichun Li Dong Liang Wenbing Ma 《Tetrahedron letters》2018,59(49):4299-4304
In this study, we have successfully synthesized a new coumarin based fluorescent chemosensor 1, in which tren and quinolone are introduced as receptors for sequential recognition of Cu2+ and PPi. The structure of chemosensor 1 was characterized by 1H NMR, 13C NMR and ESI-HR-MS. Sensor 1 showed an obvious “on-off” fluorescence quenching response toward Cu2+, and the quenching efficiency reached a maximum of 99.6% with the addition of 20 equiv. of Cu2+. The 1-Cu2+ complex showed an “off-on” fluorescence enhancement response toward PPi over many competitive anions, especially HPO42? and H2PO4?. The detection limit of sensor 1 was 1.9?×?10?6?M to Cu2+ and 5.96?×?10?8?M to PPi. In addition, sensor 1 showed a 1:1 binding stoichiometry to Cu2+ and sensor 1-Cu2+ showed a 2: 1 binding stoichiometry to PPi in CH3CN/HEPES buffer medium (9:1 v/v, pH?=?7.4). The stable pH range of sensor 1 to Cu2+ and 1-Cu2+ to PPi was from 4 to 8. 相似文献
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Wei Wang Jian Wu Qinglei Liu Yan Gao Huimin Liu Bing Zhao 《Tetrahedron letters》2018,59(19):1860-1865
A new chemosensor based on coumarin FB has been designed and synthesized for the detection of Fe3+ and PPi. FB displayed a high affinity to Fe3+ in the presence of other competing cations. The resulting FB-Fe3+ complex displayed highly sensitivity to PPi via Fe3+ displacement approach. The Fe3+ and PPi recognition processes is rapid and reversible, the detection limits of FB to Fe3+ and FB-Fe3+ complex to PPi were estimated to be 8.73?×?10?8?M and 1.25?×?10?8?M, respectively. The good biocompatibility of FB enables the investigation of fluorescent response for Fe3+ and PPi in living cells by confocal microscope. A B3LYP/6-31G(d,p) basis set was employed for optimization of FB and FB-Fe3+ complex. 相似文献
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Wei Wang Meng Wu Huimin Liu Qinglei Liu Yan Gao Bing Zhao 《Tetrahedron letters》2019,60(25):1631-1635
A novel on-off-on fluorescence chemosensor BP based on benzothiazole for the relay recognition of Fe3+ and PPi was designed and synthesized. The chemosensor BP exhibited a high affinity to Fe3+ in the presence of other competing cations. The resultant BP-Fe3+ showed excellent recognition ability for PPi via Fe3+ displacement approach. The detection limits of BP for Fe3+ and BP-Fe3+ for PPi were estimated to be 2.59 × 10?8 M and 8.47 × 10?8 M, respectively. The low cytotoxicity and good cell-membrane permeability of BP and BP-Fe3+ complex makes them capable of Fe3+ and PPi imaging in living Hep G2 cells. 相似文献
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Prerna Yadav Marta Jakubaszek Prof. Dr. Bernhard Spingler Dr. Bruno Goud Dr. Gilles Gasser Prof. Dr. Felix Zelder 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(25):5717-5723
Inorganic pyrophosphate (PPi) is considered as a diagnostic marker for various diseases such as cancer and vascular calcification. PPi also plays an important preservative role as an additive E450 in foodstuff. In this work, a selective FeIII–salen-based probe for PPi is described; this probe disassembles in the presence of the target analyte into its molecular blocks, 1,2-propanediamine and 3-chloro-5-formyl-4-hydroxybenzenesulfonic acid. The latter signaling unit leads to a fluorometric response. Compared with a related prototype, the new complex shows a 2.3-times stronger emission at 500 nm and a 155-times better selectivity of PPi over adenosine triphosphate (ATP). Importantly, the new probe was successfully applied for detecting E450 in foodstuff. 相似文献
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