Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (5): 576-580. Previous Articles     Next Articles

Original Articles

客体小分子在超分子有机凝胶体系中的扩散释放

冯桂龙,王宏,杨亚江   

  1. (华中科技大学化学与化工系 材料化学与服役失效湖北省重点实验室 武汉 430074)
  • 收稿日期:2007-06-28 修回日期:2007-08-21 出版日期:2008-03-14 发布日期:2008-03-14
  • 通讯作者: 杨亚江

Diffusion and Release of the Guest Molecules in Supramolecular Organogel

FENG Gui-Long ,WANG Hong ,YANG Ya-Jiang*   

  1. (Hubei Key Laboratory of Materials Chemistry & Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074)
  • Received:2007-06-28 Revised:2007-08-21 Online:2008-03-14 Published:2008-03-14
  • Contact: YANG Ya-Jiang

Bis(4-stearamidophenyl)methane (BSAPM) was used as a gelator for preparation of 1,1,2-trichloroethane (TCE) supramolecular organogels. The existence of salicylic acid and rhodamine B as the guest molecules led to the slight decrease of gel-sol phase transition temperatures (TGS) of the organogels. The diffusion and release of the guest molecules in the organogels were investigated by using UV-vis spectroscopy. The results indicated that release ratios of the guest molecules decreased with the increase of the gelator concentration. Wherein, the release ratios of rhodamine B were less than those of salicylic acid, which could be attributed to the larger molecular size of rhodamine B. In addition, the diffusion coefficients of rhodamine B were also less than those of salicylic acid. This trend was clearer with the increase of BSAPM concentration. The investigation indicated that the diffusion and release behavior of the guest molecules in the self-assembled organogel followed the Higuchi equation and diffusion-controlled mechanism of Fickian model.

Key words: supramolecular organogel, guest molecule, diffusion