Group Literature Talk

Chandrani Chatterjee

6th October 2008

Coordination Polymers Based on Aluminum(III) Porphyrins

Gregory J. E. Davidson,* Laura A. Lane, Paul R. Raithby, John E. Warren, Carol V. Robinson and Jeremy K. M. Sanders*

Introduction

Current Research

Synthesis

Characterization

Crystal Structure

Conclusion

Outline

Introduction

From the knowledge of a metalloporphyrin’s preferred coordination number, geometry, and ligand preference : multiporphyrin arrays with well-defined geometries

One-dimensional (1-D) “shish kebab” coordination polymers containing metalloporphyrins and bridging ligands : conductivePolymers

Metalloporphyrins containing iron(II)/iron(III), ruthenium(II), osmium(II), andcobalt(II) metal centers constitute 1-D coordination polymers

Symmetrical bridging ligands commonly used : 4,4′-bypyridine (Figure 1) ; 1,4-diazabicyclo[2.2.2]octane

Aluminum(III) benzoate complexes used as supramolecular blocks :a preference for binding nitrogenous ligands in the vacant axial site

Unsymmetrical Bridging Ligands

Combining the carboxylate unit and a nitrogen donor : isonicotinic, nicotinic acid (Figure 2)

Polymeric precursors : 1-D coordination polymers (Scheme 1)