【摘要】 在 0 1mol/LH2 SO4介质中 ,丁基罗丹明B(RBB)在 - 0 5 9伏产生 1个单扫描极谱峰。当有AuI4- 存在时 ,AuI4- 与RBB+主要通过静电引力形成疏水性的AuI4- 2RBB缔合物分子。AuI4- 2RBB存在较强的分子间作用力和疏水作用力而生成紫红色的 (AuI4-RBB) n 纳米微粒 ,在 470nm处产生 1个瑞利散射峰 ,在 61 0nm处产生 1个共振瑞利散射峰 ;而在 - 0 5 9伏处的极谱峰降低。这是由于该紫红色复合纳米微粒形成所致。当纳米微粒体系加入乙醇后 ,体系的瑞利散射峰和共振瑞利散射峰消失 ,极谱峰、同步荧光峰和颜色恢复 ,由于乙醇而致使紫红色的 (AuI4-RBB) n 纳米微粒分解为红色AuI4-RBB分子。研究结果表明 ,紫红色 (AuI4-RBB) n 纳米粒子的形成是其极谱猝灭和共振瑞利散射效应的根本原因。更多还原

【Abstract】 There is a polarographic peak at-0.59 V vs. SCE for rhodamine B butyl ester(RBB)in the medium of 0.1 mol/L H 2SO 4.The AuI - 4 and RBB + were combined into a hydrophobic association molecule of AuI 4-RBB by means of electrostatic attraction.There were stronger Van de Waals forces and hydrophobic forces among AuI 4-RBB molecules.So it formed (AuI 4-RBB) n association nanoparticles in red-violet that exhibited a strong resonance rayleigh scattering(RRS)peak at 610 nm and the RRS effect.The polargraphic quenching at-0.58 V was owing to that the RBB molecules could not be reduced at the surface of DME,which was in the body of the association nanoparticles.The (AuI 4-RBB) n association nanoparticles could be decomposed into AuI 4-RBB association molecules by alcohol.So,the scattering peaks disappeared.The polarographic peak and the fluorescence peak re-appeared.The color comes back from the red-violet to the red.The results demonstrated that the formation of (AuI 4-RBB) n association nanoparticles leaded to its polarographic quenching effect and the RRS effect.更多还原