Self-assembly of supramolecular coordination complexes based on half-sandwich metal corner with tunable host cavities

Publication date: Available online 1 February 2019Source: Journal of Organometallic ChemistryAuthor(s): Peng Li, Yi-Mei Xu, Wei Deng, Zi-Jian YaoAbstractA dinuclear Ru(II) complex with the Ru-Ru distance of 12.840(6) Å was generated by dimeric metal precursor [(p-cymene)RuCl2]2 with the ligand of 1,4-bis(dipyrromethan-5-yl)benzene. Two types of supramolecular coordination Ru(II) complexes, tetra-nuclear metallacycle (ring 2) and hexa-nuclear metallacage (cage 3), have been synthesized stepwisely by the reactions of the dinuclear Ru(II) complex with bidentate bridge ligand of 4,4′-dipyridy and tridentate bridge ligand of 2,4,6-tris(pyridine-4-yl)-1,3,5-traizine (TPT) under template-free condition. The supramolecular coordination complexes (SCCs) with large cavity can encapsulate one or two guests afforded two host-guest systems (anthracene⊂ring 2, pyrene⊂cage 3) smoothly. The two supramolecular coordination Ru(II) complexes and host-guest systems have been characterized by 1H NMR, 1H–1H COESY NMR, ESI-MS, and UV-vis. The dinuclear Ru(II) complex were further confirmed by single-crystal X-ray analysis.Graphical abstract

Source: Journal of Organometallic Chemistry - February 3, 2019 Category: Chemistry Source Type: research