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Updated: May 1, 2026

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
Published on: February 10, 2023
Interest and Limitations of Core-Shell Shaping of Heterolanthanide-Based Coordination Polymers
Thibaut Morvan1,2, Chloé Blais1, Aurélien Chang1
1"Institut des Sciences Chimiques de Rennes", Univ Rennes, INSA Rennes, ENSCR, CNRS UMR 6226, Rennes 35708, France.
Abstract:
In recent years, we have shown that it is possible to prepare heterolanthanide-based coordination polymers as core-shell microcrystalline particles. We demonstrated that this shaping can induce a significant enhancement of luminescence intensity and color emission modulation. Compounds that constitute the family of heterolanthanide coordination polymers that are isostructural to [Tb2(bdc)3(H2O)4]∞ (where bdc2- stands for benzene-1,4-dicarboxylate) have been successfully used as luminescent markers for materials traceability. Interest and limitations of core-shell shaping are highlighted. Indeed, on the one hand, it paves the road to new potential applications that are impossible to address with classical molecular alloys, and on the other hand, intrinsic constraints make them irrelevant for other applications. Additionally, this study shows that the interest of the core-shell shaping highly depends on the intermetallic energy transfer and, therefore, on the donor-acceptor pairs that are involved.
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Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly,...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Stereoisomerism
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...