2012 Volume 85 Issue 8 Pages 862-868
Cyclic nickel and free-base porphyrin dimers (Ni2-CPDPy and H4-CPDPy) include [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) both in solution and in the crystals. In the crystal packing of the inclusion complex of Ni2-CPDPy and PCBM, a nanotubular structure is constructed through the self-assembly of the porphyrin moiety. The PCBM molecules are linearly arranged in the inner channel of the nanotube to give a supramolecular peapod. On the other hand, in the crystal of the inclusion complex of H4-CPDPy and PCBM, a dimeric structure of the PCBM molecules is formed through π–π interaction between their phenyl groups.
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