Synthesis and application of carbon nanotube and fullerene derivatives functionalized via a zwitterion approach

ORGN 350

Wei Zhang, wzhang3@mit.edu, Johannes Sprafke, wzhang3@mit.edu, and Timothy M. Swager, tswager@MIT.EDU. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
The unique mechanical and electronic properties of carbon nanotubes (CNTs) have found many applications in emerging nanotechnologies. However, the difficulties associated with CNT processing and manipulation due to the extremely poor solubility of CNTs greatly impeded their applications. Considerable efforts have thus been devoted to CNT covalent functionalization to improve their solubility and enhance compatibility in composite materials. Current CNT functionalization methods usually require harsh conditions, which are incompatible with a large number of functional groups. To further facilitate CNT functionalization and its applications, we recently developed a versatile, highly efficient and more accommodating zwitterion approach to functionalize CNTs (both single-walled and multi-walled) as well as fullerenes. This report details the scope of this newly developed approach. The application of functionalized CNTs in chemical sensing as well as preparation of composite materials containing covalently linked fullerenes or CNTs will also be discussed.