Molecular Recognition – Allosterism Generated by Weak Host–Guest Interactions in Molecular Rectangles
作者:James D. Crowley、Ian M. Steele、Brice Bosnich
DOI:10.1002/ejic.200500393
日期:2005.10
Two metal-based molecular rectangles that bear two identical binding sites form 1:2 host–guest adducts with a pair of analogous planar Pt2+ complexes. The larger of the two guests shows no binding allosterism with either of the two rectangles, but substantial positive allosterism is observed when the smaller guest binds to the rectangles. It is proposed that the smaller guest is better accommodated
Molecular recognition. Electrostatic effects in supramolecular self-assemblyElectronic Supplementary information (ESI) available: synthesis and characterization of 4 and 5, details of determining the stoichiometry and association constants of the host–guest complexes, molecular modelling and electrostatic calculations. See http://www.rsc.org/suppdata/cc/b2/b210957c/
作者:James D. Crowley、Andrew J. Goshe、B. Bosnich
DOI:10.1039/b210957c
日期:2003.1.23
A di-positively charged metal-based receptor is shown to form 1:1 or 2:1 association complexes with rigid, linear two-site guests depending on the site separation, suggesting that electrostatic repulsion controls the association nuclearity.
Supramolecular Recognition Forces: An Examination of Weak Metal−Metal Interactions in Host−Guest Formation
作者:James D. Crowley、Ian M. Steele、B. Bosnich
DOI:10.1021/ic0481531
日期:2005.5.1
Molecular receptors consisting of two parallel-disposed terpy-M-Cl units (M = Pd2+, Pt2+) are used to form host-guest adducts with aromatic molecules and with neutral square-planar Pt2+ complexes. Host-guest formation is controlled by several factors including pi-pi interactions and, in some cases, weak Pt-Pt interactions between the host and the guest. This latter interaction was examined by comparing the host-guest stability of adducts formed by isoelectronic Pt2- and Au3+ complexes with the Pt2+ receptor. Consistently, the former is more stable.