中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-methyl-N-(6-methoxy-2-[(E)-2-phenyl-1-ethenyl]-8-quinolyl)benzenesulfonamide | 316124-79-5 | C25H22N2O3S | 430.527 |
—— | 4-methyl-N-(6-hydroxy-2-[(E)-2-phenyl-1-ethenyl]-8-quinolyl)benzenesulfonamide | 316124-86-4 | C24H20N2O3S | 416.5 |
—— | 8-amino-6-methoxy-2-[(E)-2-phenyl-1-ethenyl]quinoline | 316124-74-0 | C18H16N2O | 276.338 |
—— | 6-methoxy-8-nitro-2-[(E)-2-phenyl-1-ethenyl]quinoline | 316124-68-2 | C18H14N2O3 | 306.321 |
The preparation of the Zn2+ specific fluorophore 2-((E)-2-phenyl)ethenyl-8-(N-4-methylbenzene-sulfonyl)aminoquinol-6-yloxyacetic acid, H23, is described. The protonated form, H33+, is characterized by pKa values of 2.71 ± 0.03, 4.92 ± 0.03, and 10.46 ± 0.03 in 25% (v/v) aqueous ethanol 0.10 mol L–1 in NaClO4 at 298.2 K determined by potentiometric titration. At pH 6.6, but otherwise under the same conditions, the dianion, 32–, forms the fluorescent complexes [Zn(3)] and [Zn(3)2]2–, characterized by log(K1/L mol–1) = 10.5 ± 0.20 and log(K2/L mol–1) = 11.1 ± 0.1, respectively, as determined by fluorimetry. These data are compared with analogous data for the structurally similar and widely used fluorophore 2-methyl-8-p-toluenesulfonamido-6-quinolyloxyacetic acid (Zinquin A).