| 内容提要: |
we have developed a novel class of functional bis-bipyridinium-based supramolecular materials, which can easily be synthesized in a multi-gram scale and processed from water via a reversible sol-gel transition. Self-assembled complexes of amphiphile 5·4Br with p-electron rich donors 6-12 resulted in the formation of long helical and entangled nanofibers in water. Thin films and aerogels processed from these solutions exhibited dramatic reversible colour changes upon reaching the thermochromic transition temperature. Further more, stamped and ink-jet printed thermochromic patterns can be prepared from their aqueous solutions which also showed favorable compatibility with commercial inks. The thermochromic transition temperature of this series can be tailored within the range of 45 to 105 °C by varying the donors. |