Fluorescence recognition of Zn2+ in 100 % aqueous medium using 2-((1, 3 dihydroxy-2-(hydroxymethyl)propan-2 ylimino) methyl) phenol (SALTM) as ratiometric probe is reported. Moreover, SALTM can discriminate Zn2+ from Cd2+ very effectively. The binding constant and detection limit of the probe for Zn2+ is 2.2 × 104 M-1/2 and 2.79 × 10−8 M respectively. Interestingly, corresponding naphthalene derivative (HNTM) having less water solubility fails to be a ratiometric sensor. SALTM can detect intracellular Zn2+ in HeLa cervical cancer cells under fluorescence microscope. Moreover, DFT and TD-DFT studies support experimental findings.
该研究以 2-((1, 3 dihydroxy-2-(hydroxymethyl)propan-2 ylimino) methyl) phenol (
SALTM) 为比率探针,对 100 %
水介质中的 Zn2+ 进行了荧光识别。此外,
SALTM 能非常有效地区分 Zn2+ 和 Cd2+。该探针与 Zn2+ 的结合常数和检测限分别为 2.2 × 104 M-1/2 和 2.79 × 10-8 M。有趣的是,相应的
萘衍
生物(HNTM)
水溶性较低,无法成为比率传感器。
SALTM 可在荧光显微镜下检测 HeLa 宫颈癌细胞内的 Zn2+。此外,DFT 和 TD-DFT 研究也支持实验结果。