Luminescence polynuclear lanthanide complexes

Ronson, T.K., Adams, H., Harding, L.P., et al (2007) Polynuclear lanthanide complexes of a series of bridging Ugands containing two tridentate N,N, 0-donor units stmctures and luminescence properties. Dalton Transactions, 1006. 

The synthesis, structures, and luminescence properties of polynuclear lanthanide complexes and lanthanide coordination polymers, which are formed from multidentate oxygen and nitrogen-containing Schiff-base ligands, are described in this chapter. 

Polynuclear lanthanide complexes and lanthanide coordination polymers with distinct magnetic and luminescent properties are currently of interest for the use in applications involving the fabrication of novel materials and as probes in biological systems. However, compared to polynuclear complexes of the d-block transition metals, the design and... 

Lanthanides in Living Systems Lanthanides Coordination Chemistry Lanthanides Luminescence Applications Lmninescence Lanthanides Magnetic Resonance Imaging Lanthanide Oxide/Hydroxide Complexes Carboxylate Lanthanide Complexes with Multidentate Ligands Rare Earth Metal Cluster Complexes Supramolecular Chemistry from Sensors and Imaging Agents to Functional Mononuclear and Polynuclear Self-Assembly Lanthanide Complexes. 

As mentioned above, design of coordination structures of lanthanide complexes enable precise manipulations of the electron transitions in f orbitals. The geometrical, vibrational, and steric structures of lanthanide complexes are directly linked to luminescence properties such as emission quantum yield, radiative, and nonradiative rate constants. The control of the coordination structures of lanthanide complexes is expected to provide desirable emission properties. Lanthanide polynuclear complexes and coordination polymers have been also studied from the viewpoint of thermostability of complexes. However, the correlation between coordination structures and photophysical properties of lanthanide complexes has been scarcely investigated, and the optimum coordination environment for strong-luminescent properties has been still unclear. Additionally, lanthanide coordination polymer with both high thermostability and strong-luminescent properties has not been previously reported. 

Topics which have formed the subjects of reviews this year include photosubstitution reactions of transition-metal complexes, redox photochemistry of mononuclear and polynuclear" complexes in solution, excited-state electron transfer processes, transition-metal complexes as mediators in photochemical and chemiluminescence reactions, lanthanide ion luminescence in coordination chemistry, inorganic photosensitive materials," and photocatalytic systems using light-sensitive co-ordination compounds. Reviews have also appeared on the photoreduction of water.Finally, various aspects of inorganic photochemistry have been reviewed in a single issue of the Journal of Chemical Education. 

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