American Chemical Society
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Coordination-Driven Tetragonal Prismatic Cage and the Investigation on Host–Guest Complexation

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posted on 2023-03-09, 14:39 authored by Miao Li, Yu-Qi Shi, Xinye Gan, Longbin Su, Jialin Liang, Huiqi Wu, Yiting You, Meizi Che, Peiyang Su, Tun Wu, Zhe Zhang, Wei Zhang, Liao-Yuan Yao, Pingshan Wang, Ting-Zheng Xie
A coordination-driven host has been reported to encapsulate guests by noncovalent interactions. Herein, we present the design and synthesis of a new type of prism combining porphyrin and terpyridine moieties with a long cavity. The prism host can contain bisite or monosite guests through axial coordination binding of porphyrin and aromatic π interactions of terpyridine. The ligands and prismatic complexes were characterized by electrospray ionization mass spectrometry (ESI-MS), TWIM-MS, NMR spectrometry, and single-crystal X-ray diffraction analysis. The guest encapsulation was investigated through ESI-MS, NMR spectrometry, and transient absorption spectroscopy analysis. The binding constant and stability were determined by UV–Vis spectrometry and gradient tandem MS (gMS2) techniques. Based on the prism, a selectively confined condensation reaction was also performed and detected by NMR spectrometry. This study provides a new type of porphyrin- and terpyridine-based host that could be used for the detection of pyridyl- and amine-contained molecules and confined catalysis.

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