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中文摘要：
通过离子化聚甲基丙烯酸包裹的共轭寡聚物（OHOPE/PAA）纳米粒子,成功制备了阴离子型水溶性OHOPE/PAA-发光纳米粒子。分别选取阳离子猝灭剂二甲基紫精（MV2＋）和阴离子猝灭剂亚铁氰化钾（Fe（CN）4-6）,通过紫外吸收光谱、荧光光谱和时间分辨荧光光谱,详细研究了其对水溶性荧光纳米粒子在不同外界环境下的荧光猝灭行为。结果发现阴离子OHOPE/PAA-纳米粒子更容易被阳离子猝灭剂MV2＋猝灭,这表明了静电相互作用是荧光猝灭的主要驱动力。进一步研究表明,纳米粒子的浓度、pH值和离子强度都会影响纳米粒子和猝灭剂之间的静电作用,从而导致猝灭效果的变化。
英文摘要：
Anionic water-soluble conjugated nanoparticles（OHOPE/PAA-）have been prepared through ionization of neutral polyacrylic acid-capped conjugated nanoparticles.Their fluorescence quenching properties by cationic viologen（MV2＋）and anionic ferrocyanide（Fe（CN）4-6）under different environments were explored through UV-vis,PL,and time resolved photoluminescent analysis.The results showed that the anionic nanoparticles could be more efficiently quenched by cationic MV2＋than by anionic Fe（CN）4-6,indicating that electrostatic attraction is the driving force.Further investigation showed that the nanoparticle concentration,pH and ionic strength remarkably affected the electrostatic interaction and therefore resulted in the fluorescence quenching.
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