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Transition metal based supramolecular systems: synthesis, photophysics, photochemistry and their potential applications as luminescent anion chemosensors
Authors:Shih-Sheng Sun and Alistair J Lees
Institution:

Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902-6016, USA

Abstract:This review describes our recent research results on several transition-metal based supramolecular systems. A number of self-assembly metallocyclophanes and cages have been prepared. We have found that the photophysical properties of these systems are highly dependent on the nature of the bridging ligands and that many of these metallocyclophanes and cages are capable of binding different guest molecules such as inorganic anions and a variety of aromatic compounds. Moreover, trinuclear (diimine) rhenium(I) tricarbonyl complexes linked by a stilbene-like ligand exhibit most interesting photoswitching features, where the luminescence from the complexes can be switched on and off by photoinduced ligand isomerization. In addition, a structurally simple and easily synthesized luminescent anion receptor has been recently developed and it displays outstanding sensitivity and selectivity toward anionic species. We also review the synthesis of two shape-persistent hexagonal phenylacetylenes and their use as ligands to synthesize dinuclear transition-metal complexes. The photophysical properties of both phenylacetylenic ligands and their corresponding metal complexes are summarized.
Keywords:Supramolecular chemistry  Self assembly  Transition-metal organometallic complexes  Metallocyclophanes  Host–guest systems  Photoinduced energy transfer  Molecular switches  Luminescence sensors  Photophysical processes  Photochemistry  Macrocyclic ligands
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