2011
DOI: 10.1007/s10847-011-9995-5
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Selective “naked-eye” sensing of acetate ion based on conformational flexible amide-pyridinium receptor

Abstract: A simple pincer-shape anion receptor L1 containing amide-pyridinium as binding unit was synthesized and its anion binding properties were investigated by UVVis, NMR titration spectra and molecular simulation. L1 displayed better affinity toward AcO -ion with visible color change compared with other investigated anions, including F -, H 2 PO 4 -, Cl -, Br -, I -, NO 3 -and HSO 4 -ions. The selectivity was ascribed to the synergistic effects arising from hydrogen bonding, electrostatic interaction and induced-fi… Show more

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Cited by 14 publications
(8 citation statements)
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“…Fluoride and dihydrogen phosphate were bound considerably more weakly, followed by iodide and nitrate. Importantly, by increasing the aqueous content of the solvent mixture compared with the previous studies with 7·PF 6 and 8·PF 6 , the effect of anion solvation on the strength of complexation is magnified. Hence, the heavily solvated fluoride and dihydrogen phosphate anions display much weaker binding to receptor 9·(PF 6 ) 2 in comparison with chloride, and are also bound significantly more weakly than bromide.…”
Section: Dalton Transmentioning
confidence: 91%
“…Fluoride and dihydrogen phosphate were bound considerably more weakly, followed by iodide and nitrate. Importantly, by increasing the aqueous content of the solvent mixture compared with the previous studies with 7·PF 6 and 8·PF 6 , the effect of anion solvation on the strength of complexation is magnified. Hence, the heavily solvated fluoride and dihydrogen phosphate anions display much weaker binding to receptor 9·(PF 6 ) 2 in comparison with chloride, and are also bound significantly more weakly than bromide.…”
Section: Dalton Transmentioning
confidence: 91%
“…The detection process was based on the intermolecular charge transfer (ICT) from electron-rich anion binding site to electron deficient nitrobenzene fragment. [42] Kumar et al synthesized an organic receptor 18 exhibiting À NH linkages. Electron deficient nitrophenyl group acts as signalling subunit and it enhance the hydrogen bonding affinity of organic receptor.…”
Section: Optical Sensorsmentioning
confidence: 99%
“…Upon CH 3 COO − ions addition, absorption peak shifted from UV to visible region and the color of host solution changes from colorless to yellowish green. The detection process was based on the intermolecular charge transfer (ICT) from electron‐rich anion binding site to electron deficient nitrobenzene fragment [42] . Kumar et al .…”
Section: Amide Based Organic Receptorsmentioning
confidence: 99%
“…[10][11][12][13][14][15][16] Chemosensing has become a method of choice in analytical chemistry as it is sensitive and selective to specic target analytes which are ionic or neutral, depending on the design of the sensor. [17][18][19][20][21][22][23][24][25][26][27] This is complemented by the fact that they are easily synthesized, easy to apply, can be applied in real time and are based on naked eye observable colour changes. The structural frameworks of chemosensors are designed with in-built specic features, bearing a receptor, relay and reporter (3R).…”
Section: Introductionmentioning
confidence: 99%