Multicomponent methodology in coordination-driven self–assembly have recently been developed by the control of steric and/or electronic effects, precursors’ stoichiometry, metal-ion coordination specifics, etc., that allow the considerable insight into the synthesis of discrete species by the multicomponent mixture of different donors and acceptors. This provides single supramolecules from multicomponent self– assembly and is a powerful method for predetermining shapes, sizes and geometries of unprecedented multisupramolecular architectures and may enable various applications such as catalyst,1 chemical sensors,2 drug transporters,3 optical materials4 and so on. The syntheses, characterization and fluorescence emission of a fused metallarhomboid M1 and a triangle M2 will be presented. Both fused metallacycles display emissions in the aggregated state as well as in dilute solutions; however, they show different fluorescence enhancement behaviors. Furthermore, by using the "complex-as-a-ligand" strategy and the "stoichiometric controlled multicomponent self– assembly" in a single procedure, two heterometallic bicyclic complexes M3 and M4 has been prepared. As a result, through stoichiometric control and coordination directionality, new self-assembled bicyclic architectures have been formed. All the predesigned complexes M1-M4 were prepared in good yields and characterized using spectroscopic techniques. Among them, M1 and M2 reveal fluorescence emissions in the aggregated state as well as in dilute solutions.

Multicomponent supramolecules in coordination-driven self–assembly: Preparation and photophysical studies

255th National Meeting (2018)

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