Sol-gel Coordination Chemistry is based on the use of a coordination complex with ligands containing terminal trialcoxysilane groups, which can be hydrolyzed with or without presence of other silica source, to produce a coordination complex-silica network (Figures 1 and 2).
This is a novel synthetic approach based on the hydrolysis and co-condensation of metal alcoxydes linked to metal complexes to prepare hybrid materials with controlled mesoporosity.
This method yields novel Mesoporous Metal Complex-Silica (see Figures 1 and 2), with the functionality integrated in the structure of the hybrid material, enhancing at the same time the stability of the coordination complex, which is protected by the silica network [1,2]. Using this strategy, we have prepared a wide range of silica-based hybrid materials including luminescent solids  and heterogeneous catalysts [4,5].
When a surfactant is used during the synthesis, this method yields novel Mesoporous Metal Complex-Silica (see Figure 3), with the functionality integrated in the structure of the hybrid material, enhancing at the same time the stability of the coordination complex, which is protected by the silica network. Using this strategy, we have prepared a wide range of silica-based hybrid materials including luminescent solids and heterogeneous catalysts.
This methodology allows for the incorporation not only of coordination, but also a wide range of chemical functionalities such as Pd(0) nanoparticles and Mo cubanes (Figure 4). In addition to these materials, we have incorporated organic moieties in the structure of our hybrid materials containing metal complexes.
The versatility of the proposed methodology thus allow for the synthesis of mesoporous materials using cationic, neutral or anionic surfactants, with unique properties derived from the possibility to incorporate not only cationic or neutral metal complexes, but also almost any chemical moiety that could be functionalized with terminal alcoxysilanes.
The proposed sol-gel chemistry approach can be also extended to a wide range of applications ranging from catalysis to biomedical or photonic application, due to the stability of the incorporated functionality (Figure 4).
- E. Serrano, E. Serrano, J.R. Berenguer, J. Garcia Martinez.SOL-GEL COORDINATION CHEMISTRY: BUILDING CATALYSTS FROM THE BOTTOM-UP, Chem. Cat. Chem. in press (2013)
- N. Linares, E. Serrano, M. Rico, A.M. Balu, E. Losada, R. Luque, J. Garcia Martinez. INCORPORATION OF CHEMICAL FUNCTIONALITIES IN THE FRAMEWORK OF MESOPOROUS SILICA, Feature Article, Chem. Commun. (42) 9024–9035 (2011)
- M. Rico, A.E. Sepúlveda, S. Ruiz, E. Serrano, J.R. Berenguer, E. Lalinde, J. Garcia-Martinez. A STABLE LUMINESCENT HYBRID MESOPOROUS COPPER COMPLEX-SILICA. Chem. Commun.(48) 8883–8885 (2012)
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- N. Linares, E. Serrano, A.I. Carrillo, J. Garcia-Martinez, METAL-COMPLEX IONOSILICAS: CATIONIC MESOPORUS SILICA WITH NI(II) AND CU(II) COMPLEXES IN THEIR FRAMEWORK, Mater. Lett. (95) 93-96 (2013)
- J. García-Martínez, N. Linares, S. Sinilbaldi, E. Coronado, A. Ribera, INCORPORATION OF PD NANOPARTICLES IN MESOTRUCTURED SILICA, Microp. Mesop. Mater. (117) 170–177 (2009)
- A.I. Carrillo, J. García Martínez, R. Llusar, E. Serrano, I. Sorribes, C. Vicent, A. Vidal-Moya. INCORPORATION OF CUBANE-TYPE MO3S4 MOLYBDENUM CLUSTER SULFIDES IN THE FRAMEWORK OF MESOPOROUS SILICA, Micropor. Mesopor. Mater., 2012, 151, 380
- N. Linares, A.E. Sepulveda, J.R. Berenguer, E. Lalinde, J. Garcia-Martinez, MESOPOROUS ORGANOSILICAS WITH Pd(II) COMPLEXES IN THEIR FRAMEWORK, Microp. Mesop. Mater. (158) 300–308 (2012)