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J Comput Chem. 2009 Jan 15;30(1):51-6. doi: 10.1002/jcc.21022.

Noncovalent interactions in supramolecular complexes: a study on corannulene and the double concave buckycatcher.

Author information

1
Materials Chemistry Department, Sandia National Laboratories, Livermore, California 94551, USA. bmwong@sandia.gov

Abstract

Stimulated by the recent observation of pi-pi interactions between C60 and corannulene subunits in a molecular tweezer arrangement (J Am Chem Soc 2007, 129, 3842), a density functional theory study was performed to analyze the electronic structure and properties of various noncovalent corannulene complexes. The theoretical approach is first applied to corannulene complexes with a series of benchmark molecules (CH4, NH3, and H2O) using several new-generation density functionals. The performance of nine density functionals, illustrated by computing binding energies of the corannulene complexes, demonstrates that Zhao and Truhlar's MPWB1K and M05-2X functionals provide energies similar to that obtained at the SCS-MP2 level. In contrast, most of the other popular density functionals fail to describe this noncovalent interaction or yield purely repulsive interactions. Further investigations with the M05-2X functional show that the binding energy of C60 with corannulene subunits in the relaxed molecular receptor clip geometry is -20.67 kcal/mol. The results of this calculation further support the experimental interpretation of pure pi-pi interactions between a convex fullerene and the concave surfaces of two corannulene subunits.

PMID:
18504779
DOI:
10.1002/jcc.21022
[Indexed for MEDLINE]

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