58132-06-2Relevant academic research and scientific papers
Highly Selective Turn-On Fluorescent Chemodosimeter for AlIII Detection through AlIII-Promoted Hydrolysis of C=N Double Bonds in the 8-Hydroxyquinoline Aldehyde Schiff Base
Wang, Jinmin,Li, Yuanyuan,Li, Kai,Meng, Xiangru,Hou, Hongwei
, p. 5081 - 5089 (2017)
Fluorescent chemodosimeters based on small organic molecules are widely used in the detection of various analytes. However, chemodosimeters for metal ion detection are still limited to a few transition metals, such as HgII, CuII, FeIII, AuIII, etc. In this work, a fluorescent chemodosimeter of 5-chloro-7-phenyliminomethyl-8-hydroxyquinoline (2) for the detection of AlIII is reported. Chemodosimeter 2 exhibits a turn-on fluorescence response to AlIII owing to an AlIII-promoted hydrolysis of carbon–nitrogen double bonds. This reaction yielded a 1–Al complex, which exhibited high fluorescence emission at 487 nm based on inhibition of excited-state intramolecular proton transfer (ESIPT). Because of the specific catalytic ability of AlIII, the selectivity of 2 to AlIII is excellent both in aqueous solutions and in solid matrix. The fluorescence enhancement was as high as 582-fold and the turn-on fluorescence can be observed even by the naked eye upon an irradiation with a UV lamp. The detection limit of 2 for AlIII sensing is 54 nmol L?1 and the linear range is 0–50 μmol L?1. This work provides a new strategy for designing main-group-metal chemodosimeters based on small organic molecules.
‘Turn-on’ fluorescent chemosensors based on naphthaldehyde-2-pyridinehydrazone compounds for the detection of zinc ion in water at neutral pH
Liu, Yuanyuan,Li, Yuanyuan,Feng, Qi,Li, Na,Li, Kai,Hou, Hongwei,Zhang, Bing
, p. 29 - 33 (2018)
A series of naphthaldehyde-2-pyridinehydrazone derivatives were discovered to display interesting ‘turn-on’ fluorescence response to Zn2+ in 99% water/DMSO (v/v) at pH?7.0. Mechanism study indicated that different substituent groups in the naphthaldehyde moiety exhibited significant influence on the detection of Zn2+. The electron rich group resulted in longer fluorescence wavelengths but smaller fluorescence enhancement for Zn2+. Among these compounds, 1 showed the highest fluorescence enhancement of 19-fold with the lowest detection limit of 0.17?μmol/L toward Zn2+. The corresponding linear range was at least from 0.6 to 6.0?μmol/L. Significantly, 1 showed an excellent selectivity toward Zn2+ over other metal ions including Cd2+.
Photochromatic compound, a method for its preparation, and articles which contain it
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, (2008/06/13)
A photochromatic compound represented by the following general formula (I): STR1 where: R1 and R2 independently represent a linear, branched or cyclic C1-C10 alkyl radical, H, OH, F, Cl, Br, NH2, N(R4)2, COOH, OR4 or COOR4 where R4 is a C1-C10 linear, branched or cyclic alkyl radical, or an aryl radical; R3 is a variously substituted mono or polycondensed heterocyclic or aryl radical. A compound (I) demonstrates marked photochromatic characteristics both when in an organic solvent solution and when incorporated into polymer matrices.
Photochromatic compound, a method for its preparation, and articles which contain it
-
, (2008/06/13)
A photochromatic compound represented by the following general formula (I): where:, R1 and R2 independently represent a linear, branched or cyclic C1-C10 alkyl radical, H, OH, F, Cl, Br, NH2, N(R4)2, COOH, OR4 or COOR4 where R4 is a C1-C10 linear, branched or cyclic alkyl radical, or an aryl radical;, R3 is a variously substituted mono or polycondensed heterocyclic or aryl radical. A compound (I) demonstrates marked photochromatic characteristics both when in an organic solvent solution and when incorporated into polymer matrices.
