Anion−π−π Interactions in a Dinuclear M2L2Metallocycle
摘要:
The combination of the square-planar cis-protected [Pt(dppp) (O3SCF3)(2)] (M) with the ditopic N, N'-bis(3,5-dimethyl-4-pyridinyl)-4-ethoxy-2,6-pyridinedicarboxamide ligand (L) leads both in solution and in the solid state to the quantitative self-assembly of a M2L2 metallocycle. We also report crystallographic evidence derived from the solid-state structure of the dinuclear metallocycle in support of the existence of anion-pi-pi interactions.
Self-Assembly, Binding, and Dynamic Properties of Heterodimeric Porphyrin Macrocycles
作者:Pablo Ballester、Antoni Costa、Pere M. Deyà、Antonio Frontera、Rosa M. Gomila、Ana I. Oliva、Jeremy K. M. Sanders、Christopher A. Hunter
DOI:10.1021/jo0505369
日期:2005.8.1
[GRAPHICS]A series of heterodimeric tetralactam macrocycles have been self-assembled using two kinetically labile zinc porphyrin-pyridine interactions. The stability constants have been determined by UVvis titrations in CHCl(3). The stability constants depend on the degree of preorganization of the linker units connecting the interacting groups. The ability of the self-assembled macrocycles to bind a terephthalamide guest was also investigated. One of the macrocycles was used for the construction of a [2]rotaxane. The dynamic properties of this system provide insight into the exchange mechanisms that operate in complex noncovalent assemblies.