High Degree of Polymerization in a Fullerene-Containing Supramolecular Polymer


  • We thank Dr. M. Alonso for MALDI-TOF, and A. M. Soubrié and Dr. S. Casado for AFM measurements. This work has been supported by the ERC (AdG Chirallcarbon ERC-2012-ADG_20120216), the MINECO of Spain (CTQ2011-24652, CTQ2011-25714, PIB2010JP-00196, and Consolider-Ingenio CSD2007-00010), the CAM (MADRISOLAR-2 S2009/PPQ-1533). H.I. acknowledges the Spanish Ministry of Education, Culture and Sport (MECD) for an FPU grant. N.M. thanks the Alexander von Humboldt Foundation for the “Alexander von Humboldt Research Award” 2012.


Supramolecular polymers based on dispersion forces typically show lower molecular weights (MW) than those based on hydrogen bonding or metal–ligand coordination. We present the synthesis and self-assembling properties of a monomer featuring two complementary units, a C60 derivative and an exTTF-based macrocycle, that interact mainly through π–π, charge-transfer, and van der Waals interactions. Thanks to the preorganization in the host part, a remarkable log Ka=5.1±0.5 in CHCl3 at room temperature is determined for the host–guest couple. In accordance with the large binding constant, the monomer self-assembles in the gas phase, in solution, and in the solid state to form linear supramolecular polymers with a very high degree of polymerization. A MW above 150 kDa has been found experimentally in solution, while in the solid state the monomer forms extraordinarily long, straight, and uniform fibers with lengths reaching several microns.