Assembly of Nano-Scale Circular Supramolecular Arrays through pi-pi Aggregation of Arc-Shaped Helicate Units This work was supported by the University of Warwick (L. J. C.). We thank the EPSRC and Siemens Analytical Instruments for grants in support of the diffractometer and the EPSRC National Mass Spectrometry Centre, Swansea, for recording the mass spectra
Angew Chem Int Ed Engl. 2001 Mar 16;40(6):1079-1081.
doi: 10.1002/1521-3773(20010316)40:6<1079::aid-anie10790>3.0.co;2-q.