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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。
In 0 1 mol / LH 2 SO 4 medium, butyl rhodamine B (RBB) produced a single-scan polarographic peak at -0.59 volts. When AuI4- is present, AuI4- and RBB + form electrostatic AuI4-2RBB associate molecules mainly by electrostatic attraction. AuI4-2RBB has a strong intermolecular force and hydrophobic interaction to form AuI4-RBB nanoparticles, which produces one Rayleigh scattering peak at 470 nm and one resonance Rayleigh at 610 nm Scattering peak; while the polar peak at -059V decreased. This is due to the formation of the fuchsia composite nanoparticles. When the nanoparticles were added into ethanol, the Rayleigh scattering peak and the resonance Rayleigh scattering peak of the system vanished, and the polarographic peak, synchronous fluorescence peak and color recovered. Due to the ethanol, the AuI4-RBB n nanoparticles were decomposed into Red AuI4-RBB molecule. The results show that the formation of AuI4-RBB nanoparticles is the fundamental reason for its polarographic quenching and resonance Rayleigh scattering.