MS36-P23 Pore engineering through the supramolecular modification of Mo-based metallocycles: from 0D discrete cavities to 1D open channelsThe synthesis of novel crystalline discrete molecular materials combined with interesting supramolecular architectures providing porosity still consists one of the challenges in synthetic coordination chemistry. The forming cavities, resulting from the coordination driven self-assembly of the clusters, play a crucial role in the host-guest recognition properties with diverse applications in catalysis, adsorption, drug delivery etc.1 Moreover, any crystal-packing modification can significantly differentiate the physical properties of the solid-state material.2 Although network materials are representative examples of crystalline porous materials, discrete molecular compounds have shown a tendency to a more close-packing supramolecular assemblies. To this end, research efforts have been devoted to the development of new coordination clusters displaying permanent porosity.3
Herein we present the syntheses of two structurally similar Mo-based metallocycles with different supramolecular structures. The replacement of the terminally bound pyridines of the initial cluster by the 1,3-di(4-pyridyl)propane forced the metallocycles to reorient their positions yielding a crystal-packing architecture with well-defined channels within the compounds (see Figure). Fully chemical and physical characterization of both complexes is also discussed.References:
1. Chen, L. et al. (2015). Acc. Chem. Res. 48, 201-210.
2. Davis, A. V. et al. (2002). PNAS 99, 4793-4796.
3. Jacobs, T. & Barbour, L. J. (2013). New J. Chem. 37, 71-74.Keywords: Metallocycles, Porosity, Molybdenum