2013
DOI: 10.1039/c3ra42931h
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A highly selective and ratiometric fluorescent sensor for relay recognition of zinc(ii) and sulfide ions based on modulation of excited-state intramolecular proton transfer

Abstract: A highly selective and ratiometric fluorescent sensor for relay recognition of zinc(II) and sulfide ions based on modulation of excited-state intramolecular proton transfer3

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Cited by 85 publications
(32 citation statements)
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“…Hence the iodide content of breast milk and urine is often required for nutritional, metabolic, and epidemiological studies of thyroid disorder [6]. Therefore, developing chemosensors that can detect iodide is strongly desired [7][8][9][10][11][12][13][14][15][16][17][18].…”
Section: Introductionmentioning
confidence: 99%
“…Hence the iodide content of breast milk and urine is often required for nutritional, metabolic, and epidemiological studies of thyroid disorder [6]. Therefore, developing chemosensors that can detect iodide is strongly desired [7][8][9][10][11][12][13][14][15][16][17][18].…”
Section: Introductionmentioning
confidence: 99%
“…of Zn 2+ to the metal ion containing solution, great increase in fluorescence intensity at 572 nm were observed except for Cu 2 + , Co 2 + , Hg 2 + , Ag + , and Ni 2+ . The observed interference from Cu 2 + , Co 2 + , Hg 2 + , Ag + , and Ni 2+ may attributed to their high binding affinity to the sensor, and the paramagnetic nature (Cu 2+ , Co 2+ and Ni 2+ ) [35] and ligand to metal charge transfer (Hg 2 + and Ag + ) [36] quenched the emission of the formed complex. These results imply that L has its limitation for Zn 2+ detection in the presence of any of those interfered metal ions.…”
Section: Resultsmentioning
confidence: 99%
“…The signal at 8.85 ppm in free L could be assigned to H d due to the possible hydrogen bonding between H d and amide O atom, Zn 2+ binding destroyed the hydrogen bonding and led to its up-field shift. 13 These results indicate that sensor L may bind Zn 2+ with an imidic acid form through tertiary N and imidic acid O atoms. This binding mode of sensor L with Zn 2+ suppressed the PET process from diethanolamine nitrogen to phenylbenzimidazole moiety, 14 which is responsible for the fluorescence enhancement.…”
mentioning
confidence: 84%
“…Sensor L was facilely synthesized by the reaction of 1 with diethanolamine (Scheme 1) and was characterized by 1 H NMR, 13 C NMR and HRMS. The good water solubility of L makes it has a potential application for metal ion detection in water solution.…”
Section: Resultsmentioning
confidence: 99%