Angewandte Chemie - International Edition
Angewandte Chemie - International Edition
5 years ago

Construction of Discrete Pentanuclear Platinum(II) Stacks with Extended Metal–Metal Interactions by Using Phosphorescent Platinum(II) Tweezers

Construction of Discrete Pentanuclear Platinum(II) Stacks with Extended Metal–Metal Interactions by Using Phosphorescent Platinum(II) Tweezers
Kam-Hung Low, Vivian Wing-Wah Yam, Alan Kwun-Wa Chan, Fred Ka-Wai Kong, Maggie Ng
Discrete pentanuclear PtII stacks were prepared by the host-guest adduct formation between multinuclear tweezer-type PtII complexes. The formation of the PtII stacks in solution was accompanied by color changes and the turning on of near-infrared emission resulting from Pt⋅⋅⋅Pt and π–π interactions. The X-ray crystal structure revealed the formation of a discrete 1:1 adduct, in which a linear stack of five PtII centers with extended Pt⋅⋅⋅Pt interactions was observed. Additional binding affinity and stability have been achieved through a multinuclear host-guest system. The binding behaviors can be fine-tuned by varying the spacer between the two PtII moieties in the guests. This work provides important insights for the construction of discrete higher-order supramolecular metal-ligand aggregates using a tweezer-directed approach. Stack up: Discrete pentanuclear PtII stacks were prepared by the host-guest adduct formation between multinuclear tweezer-type PtII complexes, with color changes and the turning on of near-infrared emission resulting from Pt⋅⋅⋅Pt and π–π interactions. The X-ray crystal structure revealed the formation of a discrete 1:1 adduct, in which a linear stack of five PtII centers with extended Pt⋅⋅⋅Pt interactions was observed.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201708504

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