Synthesis, Crystal Structures, and Luminescent Properties of Noninterpenetrating (6,3) Type Network Lanthanide Metal–Organic Frameworks Assembled by a New Semirigid Bridging Ligand
✍ Scribed by Qin Wang; Kuan-Zhen Tang; Wei-Sheng Liu; Yu Tang; Min-Yu Tan
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 714 KB
- Volume
- 2010
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Abstract
A series of lanthanide metal–organic frameworks (MOFs) possessing 4f homometallic 2D noninterpenetrating (6,3) honeycomb topological network structures with lanthanide atoms acting as three‐connected centers have been assembled by using a semirigid bridging ligand with lanthanide nitrates, namely [{Ln~2~(NO~3~)~6~L~3~}·(H~2~O)~2~·(CHCl~3~)]~n~ (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er; L = 2,5‐dimethyl‐1,4‐bis[{(2′‐benzylaminoformyl)phenoxy}methyl]benzene. The coordination layers are linked by intermolecular hydrogen bonds to form a 3D cage structure with 1D supramolecular channels along the c axis, in which chloroform and lattice water molecules are located to stabilize the structure. Under specific excitation, the Sm^III^, Eu^III^, Tb^III^, and Dy^III^ MOFs exhibit characteristic emissions. The lowest triplet‐state energy level of the ligand indicates that the energy level of the ligand matches better to the resonance levels of Tb^III^ and Dy^III^ rather than Sm^III^ and Eu^III^ ions.