Lanthanide MOFs

Thus, it is of great significance to select or design suitable ligand with the appropriate energy level. To illustrate the sensitizations effect of ligands, we show here two representative examples of such luminescent lanthanide MOFs. The first... 

Dang et al. prepared a family of lanthanide MOFs using a semirigid trivalent carboxylic acid as linker [208]. These MOFs are isostructural and display typical lanthanide luminescent emissions of Eu ", Tb ", Sm ", and Dy ", respectively. The absence of obvious emission from the ligand implies the efficient energy transfer... 

Recently, the use of nanoscale lanthanide MOFs for biological and biomedical applications has attracted increasing attentions. The interest of these functional materials relies on the combination of the chemical or biofunctional behavior of MOFs and the unique luminescence properties of lanthanide ions, such as high photostability, long decay rates, large Stokes shifts, and narrow emission bands. Besides their luminescent characteristics, lanthanide MOFs can possess paramagnetic properties which help to increase the relaxation rate of water protons in the... 

White KA, Chengelis DA, Gogick KA et al (2009) Near-infrared luminescent lanthanide mof barcodes. J Am Chem Soc 131 18069—18071... 

Michaelides A, Skoulika S, Siskos MG (2011) Photoreactive 3D microporous lanthanide MOFs formation of a strained ladderane in a partial single crystal-to-single crystal manner. Chem Commun 47(25) 7140-7142... 

Michaelides A, Skoulika S, Siskos MG (2013) 2D And 3D photoreactive lanthanide MOFs of trans, trans-muconic acid. Chem Commun 49(10) 1008-1010... 

Figure 13 The formation of MOFs based on rare earth (lanthanide) ions by LAG with trimesic acid (a) the formation of an open structure is dictated by LAG with DMF rather than water and (b) the formation of mixed-metal lanthanide MOFs containing selected pairs of metal ions...

Quite a different scenario is expected for a lanthanide metal ion, where the valence orbitals are buried inside. Thus, a lanthanide ion has less preference for a particular coordination geometry. This can sometime allow ready transformation of coordination geometry around the metal center, leading to drastic changes in the overall structure and making it amorphous. Unlike MOFs built with transition metals, lanthanide MOFs rarely exhibit SC-SC transformation. One example is reported in a thermally... 

---