物理化学学报 >> 2003, Vol. 19 >> Issue (03): 237-241.doi: 10.3866/PKU.WHXB20030311

研究论文 上一篇    下一篇

组份可控的钌螯合物功能单分子膜

盛夏;方堃;邹纲;何平笙;吕卫星   

  1. 中国科学技术大学高分子科学与工程系,合肥 230026
  • 收稿日期:2002-06-10 修回日期:2002-09-20 发布日期:2003-03-15
  • 通讯作者: 何平笙 E-mail:hpsm@ustc.edu.cn

Component-controllable Monolayer of Ru Chelate Complex

Sheng Xia;Fang Kun;Zou Gang;He Ping-Sheng;Lü Wei-Xing   

  1. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026
  • Received:2002-06-10 Revised:2002-09-20 Published:2003-03-15
  • Contact: He Ping-Sheng E-mail:hpsm@ustc.edu.cn

摘要: 用作“表面离子”的钌螯合物Ru(dpphen)32+与脂肪酸类成膜分子以1:2混合时能够得到稳定的混合单分子膜.以十八烷基三氯硅烷(octadecayl trichloro silane, OTS)分子部分取代Ru(dpphen)32+,得到功能分子组份可控的混合单分子膜.研究表明,OTS分子在纯水表面上可以形成交联网状单分子膜结构,混入硬脂酸(SA)分子后,网状结构逐渐被破坏.SA含量增加,破坏的程度就增大,直至SA/OTS为3:1时,完全没有网状交联结构,形成可以用来沉积LB膜的均匀致密的单分子膜.表面离子Ru(dpphen)32+与OTS和SA一起构成三组份混合单分子膜,OTS和Ru(dpphen)32+为表面离子.单分子膜中混有Ru(dpphen)32+分子,可以有效地阻止OTS的交联发生,同时Ru(dpphen)32+/SA基团与OTS/SA基团是均匀共混的.改变Ru(dpphen)32+/SA基团与OTS/SA基团的混合比,即可以做到Ru(dpphen)32+的组份精确可控,得到可用来沉积LB膜的均一、稳定的单分子膜.

关键词: 钌螯合物, 硬脂酸, 十八烷基三氯硅烷(OTS), Langmuir-Blodgett(LB)膜, 单分子膜

Abstract: In a mixture of Ru(dpphen)32+ and stearic acid (SA),the ratio of Ru(dpphen)32+ :SA=1:2 is the only best one and any excess of Ru(dpphen)32+ or SA is not favorable for the deposition of mixed monolayer and LB films. If variation of the composition of Ru(dpphen)32+ in LB films is needed, some non-functional “surface ions" must be introduced to replace Ru(dpphen)32+ partially. The octadecyltrichlorosilane (OTS) was used to replace Ru(dpphen)32+ successfully. The threshold concentration of Ru(dpphen)32+ in mixing SA-OTS- Ru(dpphen)32+ on pure water and forming Ru(dpphen)32+ controlled LB films was studied. OTS can form crosslinked network monolayer on pure water, on interfusing SA, crosslinked network is destroyed gradually. Increase of concentration of SA, till SA/OTS=3:1,there is no crosslinked network in the monolayer and is favorable for the stable and condensed mixed monolayer and LB films deposition. Ru(dpphen)32+/OTS/SA forms three component mixed monolayer, Ru(dpphen)32+/OTS are surface ions. It is availably to prevent OTS from crosslinking when Ru(dpphen)32+ is mixed. Ru(dpphen)32+/SA and OTS/SA are uniformly mixed. By changing the mixing ratios of Ru(dpphen)32+/SA and OTS/SA, component of Ru(dpphen)32+ will be controlled accurately and can lead the deposition of stable and condensed mixed monolayer for LB films.

Key words: Ru chelate complex, Stearic acid, Octadecyltrichlorosilane, Langmuir-Blodgett film, Monolayer