Xi-Sen Wang

Highly stable olefin–Cu(I) coordination oligomers and polymers

Highly stable Cu(I)-olefin coordination oligomers and polymers have been successfully prepared and applied to construct metal-organic frameworks (MOFs) with interesting physical and chemical functions in recent years. In this review, we present the olefin-Cu(I) coordination oligomers and polymers and their novel physical properties. From structure to functions, particular emphasis is placed on the coordination and organometallic chemistry of olefin-Cu(I) coordination oligomers and polymers, their structures and potential applications as solids possessing unusual physical functional properties such as electrochemical, chiral separation, fluorescent sensing and ferroelectricity.

A Cluster Rearrangement of an Open Cubane (Cu4Br4) to a Prismane (Cu6Br6) in a Copper(I)–Olefin Network†

The rational design and self-assembly of copper(i)±olefin coordination polymers possessing high thermal stability has been the focus of intense interest in recent times.[1] While these materials possess many of the general features normally associated with coordination polymers, the inclusion of bridging ligands that are capable of p bonding offers the possibility of unusual and novel properties. The CuI±olefin complexes examined so far have demonstrated an ability to act as fluorescent sensors,[1] and have potential applications in areas such as olefin separation[2] and enantioseparation.[3] To the best of our knowledge, the presence of clusters, such as cubanes, within Cu±olefin coordination polymers is unknown, however there are a number of metal±organic frameworks with clusters acting as connecting units. Such materials have demonstrated gas-storage capabilities as well as exhibiting magnetic and catalytic properties.[4±6] The successful generation of networks incorporating olefin coordination to a copper cluster represents an exciting challenge in modern supramolecular and organometallic chemistry. With this in mind, we have studied the reactions of triallyl-1,3,5-triazine2,4,6(1H,3H,5H)-trione (TTT) with CuBr at different temperatures. Herein we report the synthesis, solid-state structures, and some electrochemical properties of two materials generated from such reactions. The reaction between TTT and CuBr in methanol at 50± 60 8C in a sealed tube yielded a product with the formula [Cu4Br4(TTT)2]n (1), which was examined by single-crystal X-ray diffraction.[7] In this complex, Cu4Br4 clusters are linked by TTT ligands to form a polymeric chain (Figure 1). The Cu

Olefin-Copper(I) Complexes and their Properties

The synthesis, structure and the novel chemical and physical properties of olefin-copper(I) complexes are the focus of this review. Particular emphasis is placed on the molecular assembly of these compounds and their potential applications as homogeneous catalysts in solution and as solids possessing unusual physical functional properties.