Toroidal Nanoobjects from Rosette Assemblies of Melamine-Linked Oligo(p-phenyleneethynylene)s and Cyanurates


  • S.Y., S.M., A.A., and A.K. thank Department of Science and Technology, New Delhi and the Japan Society for Promotion of Science (Japan) for financial support. A.A. is a Ramanna Fellow of DST at NIIST. S.M. acknowledges the University Grants Commission, New Delhi, for a fellowship. This is manuscript No. PPG-263 from NIIST.


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Nanodonuts! A hydrogen-bonded cyclic assembly (rosette, left) of a melamine featuring π-conjugated oligo(p-phenyleneethynylene) hierarchically self-organizes with a cyanurate in decane under dilute conditions to form toroidal nanostructures (right) with a diameter of 40 nm.