|
The ionic liquid is completely at room temperature by the anion and cation composition of the organic liquid material , has a negligible vapor pressure , dissolved ability, wide electrochemical window , the ion conductive , good chemical and thermal stability characteristics, therefore ionic liquid not only in organic synthesis, catalysis separation , nano-materials preparation and sensor field wide application , and the functionality of the application in the fields of chemistry and materials are rapid development . Ionic liquids having a very superior design performance, and can have various functions of the group as the anion introduced into the ionic liquid, to achieve the ionic liquid functional . On the other hand , the three-dimensional photonic crystals ordered macroporous structure can be directly and efficiently through the legal system in the colloidal crystal template , with each other through network -like pore structure and double discontinuities (ie interconnected solid skeleton and interconnected holes the structural system ), due to its three-dimensional ordered cyclical forming structure usually with visible and infrared light , strong interaction occurs , resulting in the Bragg diffraction , show the hues of the rainbow . Imidazolium ionic liquids and the photonic crystal technology platform, built ionic liquid polymer material having a photonic crystal structure having a variety of functions . By a simple anion - exchange method , it is possible to make the polymeric material to achieve the following characteristics : (1) regulating the Photonic bandgap range , can achieve the purpose of the material change of the naked eye observation ; (2) can be prepared into the electrochemical valve , molecule having a recognition role; (3) can electrical signals into optical signals expression , provides the possibility for building up electric switch ; (4) can be modified to a material surface properties . Therefore, the use of the constructed ionic liquid polymer material can be prepared as a humidity sensing material , ion recognition material , is applied to environmental humidity test, molecular recognition areas . Built by the ionic liquid and photonic crystal sensing material can be designed , high sensitivity , fast response time , low pollution , repeated use and preparation of simple advantages . More importantly , the ionic liquid polymer photonic crystal structures for the platform , by changing the different anions and cations , as well as the functional groups on the ion , can be designed to have a more versatile sensor material , very broad application prospects .
|