论文部分内容阅读
以二乙醇胺和2-羟基-5-硝基苄基溴为原料合成了N-(2-钾氧基-5-硝基苄基)二乙醇钾基胺传感器分子(L)。由元素分析、1HNMR等进行了结构表征。在水溶剂中采用紫外-可见光谱法研究了H+、Li+、Na+、K+、Mg2+、Ca2+、Mn2+、Co2+、Ni2+、Cu2+、Zn2+、Cd2+、Hg2+及Pb2+对L光谱的影响。结果表明,L分子的紫外-可见光谱仅对体系中的H+和Cu2+有特殊的选择敏感性,在体系的pH或Cu2+浓度增大时,L在311 nm处的吸收峰会发生不同程度的红移并伴随强度的增大;此基于H+和Cu2+离子调制传感器L分子内电荷转移跃迁的传感机制。
The N- (2-oxo-5-nitrobenzyl) diethanolamine sensor molecule (L) was synthesized from diethanolamine and 2-hydroxy-5-nitrobenzyl bromide. From elemental analysis, 1H NMR and other structural characterization. The effects of H +, Li +, Na +, K +, Mg2 +, Ca2 +, Mn2 +, Co2 +, Ni2 +, Cu2 +, Zn2 +, Cd2 +, Hg2 + and Pb2 + on the L spectra were studied by UV-Vis spectroscopy in aqueous solvents. The results show that the UV-Vis spectra of L molecules have a special selective sensitivity to both H + and Cu2 + in the system. When the pH or Cu2 + concentration of the system is increased, the absorption peaks of L at 311 nm undergo red-shift And with the increase of the intensity; this is based on the sensing mechanism of intramolecular charge transfer transitions in the sensor L of H + and Cu2 + ions.