The naphthoic acid-functionalized polystyrene (NAPS) , in which the ligand of naphthoic acid (NA) was binding to the side chain of polystyrene ( PS) , was prepared through the nucleophilic substitution of the chloromethyl group of chloromethylated polystyrene (CMPS) with phenolic hydroxyl group of 6-hydroxy-2-naphthoic acid (HNA). The chemical structure of NAPS was characterized by FTIR and 'H-NMR spectra. The coordination reaction between NAPS and Eu3+ ion was carried out to obtain the polymer-rare earth complex, NAPS-Eu( H). The fluorescence emission of NAPS-Eu( II) was preliminarily examined. In this work, the functionalization-modification of PS was mainly investigated. The effects of the main factors on the nucleophilic substitution between CMPS and HNA were examined, the reaction mechanism was presented, and the reaction conditions were optimized. The results showed that the rate of the nucleophilic substitution is independent of the concentration of the nucleophile HNA, indicating that this is a typical unimolecular nucleophilic substitution i. e. SN1. The solvent polarity is favourable for the fracture of C-Cl bond of the benzyl chloride group, and can accelerate the substitution reaction. The raising temperature is also favorable to the substitution reaction. The complex NAPS-Eu ( HI) possesses the characteristic fluorescence emission spectrum of Eu3+ ion. More significantly, the macromolecular ligand NAPS can strongly sensitize the fluorescence-emission of Eu3 +.%以6-羟基-2-萘甲酸(HNA)为试剂,使氯甲基化聚苯乙烯(CMPS)的氯甲基与HNA的酚羟基之间发生亲核取代反应,将萘甲酸(NA)配基键合在聚苯乙烯侧链,制得了功能化改性的NAPS,采用红外光谱和核磁共振氢谱对其结构进行了表征,并使之与Eu(Ⅲ)配位,制得了高分子-稀土配合物NAPS-Eu(Ⅲ),初步探索了该配合物的荧光发射特性.本文重点研究了聚苯乙烯的功能化改性反应,考察了主要因素对CMPS与HNA之间亲核取代反应的影响规律,分析了反应机理,优化了反应条件.实验结果表明,CMPS与HNA之间取代反应的速率与亲核试剂HNA的浓度无关,该取代反应的机理是典型的SN1反应；使用极性较强的溶剂二甲亚砜以及采用较高的温度(70℃),有利于亲核取代反应的进行.NAPS-Eu(Ⅲ)不仅发射出Eu3+的特征荧光,而且大分子配基NAPS对Eu3的荧光发射显示出很强的敏化作用.
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