School of Chemistry and Chemical Engineering, Shandong Key Laboratory of Life-Organic Analysis & Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu 273165, China.
School of Chemistry and Chemical Engineering, Shandong Key Laboratory of Life-Organic Analysis & Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu 273165, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Oct 5;203:455-460. doi: 10.1016/j.saa.2018.06.015. Epub 2018 Jun 5.
A multi-hydroxyl Schiff-base derivative, N-2'-hydroxyl-1'-naphthyl methylene-2-amino phenol (HNMAP), was synthesized and characterized by FTIR, H NMR and UV-vis spectroscopy. It was noted to find there was great effect for solvent and pH on the UV-vis spectroscopy of HNMAP. Especially, some metal ions could make its UV-vis spectra changed regularly with different time-resolved effects. For example, a real-time and multi-wavelength response to Fe at 520 nm, 466 nm and 447 nm and a quite slow one about 26 min to Fe at 447 nm and 466 nm, respectively. Under the optimized conditions, the changes in the corresponding absorption intensities at above wavelengths were in proportion to c or c during respectively partitioned linear ranges, which realized to quantitatively detect Fe or Fe with a large linear range more than two orders of magnitude. A 1:1 complex mode for HNMAP-Fe and 1:2 for HNMAP-Fe were proposed from UV-vis spectral titration and Job's plot. HNMAP would be a potential sensor for colorimetric detection of Fe and Fe in practice.
一种多羟基席夫碱衍生物，N-2'-羟基-1'-萘基亚甲基-2-氨基苯酚（HNMAP），通过傅里叶变换红外光谱（FTIR）、核磁共振氢谱（H NMR）和紫外可见光谱（UV-vis）进行了合成和表征。结果表明，溶剂和 pH 值对 HNMAP 的紫外可见光谱有很大影响。特别是，一些金属离子可以使其紫外可见光谱发生有规律的变化，并具有不同的时间分辨效应。例如，在 520nm、466nm 和 447nm 处对 Fe 的实时和多波长响应，以及在 447nm 和 466nm 处对 Fe 的相当缓慢的响应，分别需要 26 分钟左右。在优化条件下，上述波长相应吸收强度的变化在分别分区的线性范围内与 c 或 c 成正比，实现了对 Fe 或 Fe 的定量检测，线性范围超过两个数量级。通过紫外可见光谱滴定和 Job 图提出了 HNMAP-Fe 的 1:1 络合模式和 HNMAP-Fe 的 1:2 络合模式。HNMAP 将成为实际中用于检测 Fe 和 Fe 的比色传感器的潜在候选者。
