高等学校化学学报

高等学校化学学报

• 研究简报 • 上一篇    下一篇

采用一阶导数光谱研究[PtCl6]2-的可控水解

于迎涛1,2, 王晶1, 杨海军2, 徐柏庆2   

    1. 大连海事大学环境科学与工程学院, 大连 116026;
    2. 清华大学化学系, 北京 100084
  • 收稿日期:2006-01-10 修回日期:1900-01-01 出版日期:2006-12-10 发布日期:2006-12-10
  • 通讯作者: 于迎涛

Controlled-hydrolysis of [PtCl6]2- Studiedwith 1st Derivative Spectra

YU Ying-Tao1,2, WANG Jing1, YANG Hai-Jun2, XU Bo-Qing2   

    1. College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China;
    2. Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2006-01-10 Revised:1900-01-01 Online:2006-12-10 Published:2006-12-10
  • Contact: YU Ying-Tao

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摘要： 通过紫外吸收光谱、导数光谱以及溶液电导率的变化研究了紫色光对[PtCl6]2-水解过程的影响规律.

关键词: 水解, 紫外光谱, 导数光谱, 电导, 纳米粒子形状

Abstract: The aquochloro ligand exchange between [PtCl6]2- and H2O is an important factor to regulate the facet growth in shape-controlled synthesis of Pt nanocrystals because the electric charge and coordination structure of Pt precursor strongly influences its adsorption and reduction on Pt nanocrystal surface. In this contribution, the exposure to violet light(415 nm) is found to efficiently weaken the characteristic LMCT absorption and increase the conductance of 1.5×10-4 mol/L K2PtCl6 aqueous solution that is fairly stable in dark aging. And, the variations of both the LMCT adsorption and the conductance are closely related with the exposure time. The 1st derivative spectra of ultraviolet absorption shows that the characteristic LMCT absorption shifts toward shorter wavelength along with the exposure which is mainly attributed to the aquochloro ligand exchange of [PtCl6]2-.

Key words: Hydrolysis, UV spectrum, Derivative spectrum, Conductance, Nanoparticle shape

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