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以3-硝基-4-羟基苯甲酸(NHBA)为试剂,使氯甲基化聚砜(CMPSF)的氯甲基与NHBA分子中的酚羟基之间发生亲核取代反应,将硝基苯甲酸配基(NBA)键合在聚砜侧链,制得了功能化的聚砜NBA-PSF。本文重点研究了实现聚砜功能化转变的亲核取代反应,考察了主要因素的影响规律,优化了反应条件。在NBA-PSF的结构进行表征的基础上,使之与Eu(Ⅲ)离子配位,制得了高分子-稀土配合物PSF-(NBA)3-Eu(Ⅲ),初步探索了该配合物的荧光发射特性。实验结果表明,CMPSF与NHBA之间取代反应遵循S N1的反应机理;使用极性较强的溶剂(N,N-二甲基甲酰胺)及采用较高的温度(70℃),有利于反应的进行。对Eu(Ⅲ)离子的荧光发射,大分子链上的配基NBA比苯甲酸(BA)配基具有更强的敏化作用,表明芳羧酸芳环上硝基对配合物光致发光性能的正性影响。
With 3-nitro-4-hydroxybenzoic acid (NHBA) as a reagent, the chloromethyl group of chloromethylated polysulfone (CMPSF) and the hydroxyl group in the NHBA molecule were nucleophilic substitution reaction, nitrobenzene Formic acid ligand (NBA) bonded to the polysulfone side chain, made of functionalized polysulfone NBA-PSF. This paper focuses on the nucleophilic substitution reaction to achieve functionalization of polysulfone, examines the influence of the main factors, and optimizes the reaction conditions. Based on the characterization of the structure of NBA-PSF, the complex of PSF- (NBA) 3-Eu (Ⅲ) with Eu (Ⅲ) was prepared and the complex of Fluorescence emission characteristics. The experimental results show that the substitution reaction between CMPSF and NHBA conforms to the reaction mechanism of S N1; the use of a more polar solvent (N, N-dimethylformamide) and higher temperature (70 ℃) To carry out. For Eu (Ⅲ) ion fluorescence emission, the ligand on the macromolecule chain has stronger sensitization than the benzoic acid (BA) ligand, indicating the photoluminescence of the nitro group on aromatic ring Positive effect.