Facile Synthesis of Cyclodextrin Functionalized Reduced Graphite Oxide with the Aid of Ionic Liquid for Simultaneous Determination of Guanine and Adenine

Here, a facile reduction approach for synthesis of -cyclodextrin functionalized reduced graphite oxide with the aid of ionic liquid (CD/IRGO) was reported. This strategy relies on the simple mixing of pre-pared aqueous CD/GO with ionic liquid (IL) at high temperatures, which can bring about a well dispersed CD/RGO in the utilized IL (CD/IRGO) with a synchronous evaporation of water. The as-prepared CD/IRGO product can be stably re-dispersed in water (up to 1.0mg/mL) after washed and dried. And the presented CD/IRGO composites possess high supramolecular recognition capability and good conductivity for realizing enhanced electrochemical response towards simultaneous detection of guanine and adenine compared with other CD/carbon (RGO or carbon nanotube) based composites. In the presence of one of analysts, the linear response ranges is 0.03-10.0M for guanine and 0.02-7.0M for adenine, respectively, with detection limit of 0.01M for both guanine and adenine (S/N=3). This ease of making the CD/IRGO composite will open up possibilities of its diversifier applications.