Corannulene (COR) buckybowls were proposed as near ideal hosts for fullerene C60, but direct complexation of C60 and COR has remained a challenge in supramolecular chemistry. We report the formation of surface-supported COR-C60 host-guest complexes by deposition of C60 onto a COR lattice on Cu(110). Variable-temperature scanning tunneling microscopy studies reveal two distinctly different states of C60 on the COR host lattice, with different binding energies and bowl-ball separations. The transition from a weakly bound precursor state to a strongly bound host-guest complex is found to be thermally activated. Simple model calculations show that this bistability originates from a subtle interplay between homo- and heteromolecular interactions.
|Titolo:||C-60/corannulene on Cu(110): A surface-supported bistable buckybowl-buckyball host-guest system RID C-2494-2011 RID E-8227-2010 RID E-6415-2011 RID B-5396-2011|
|Autori:||Xiao W; Passerone D; Ruffieux P; Ait-Mansour K; Groning O; Tosatti E; Siegel JS; Fasel R|
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||10.1021/ja077816I|
|Appare nelle tipologie:||1.1 Journal article|