Hierarchical packing of racemic metallosupramolecular cages with Ni(II)-based triple-stranded helicate building blocksopen access
- Authors
- Nguyen, Thanh Nhan; Nguyen, Anh Ngoc; Tran, Ngoc Minh; Park, In-Hyeok; Yoo, Hyojong
- Issue Date
- May-2023
- Publisher
- International Union of Crystallography
- Keywords
- nickel-based racemic cages; high-order assemblies; triple-stranded helicates; supramolecular building blocks; metallocavitands; metallosupramolecular cages
- Citation
- IUCrJ, v.10, no.Pt 3, pp 321 - 328
- Pages
- 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- IUCrJ
- Volume
- 10
- Number
- Pt 3
- Start Page
- 321
- End Page
- 328
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/113294
- DOI
- 10.1107/S2052252523002385
- ISSN
- 2052-2525
2052-2525
- Abstract
- Three novel hierarchical Ni-based metallosupramolecular cages were constructed from nickel ions, pyridine dicarboxylates and isophthalate derivative ligands (the substituents on C5 of isophthalate are methyl, tert-butyl and bromo groups). In every cage, two multinuclear nickel clusters, assembled from four nickel atoms and three pyridine dicarboxylate ligands, are interlinked by three isophthalate-derivative ligands to form a nickel-based triple-stranded helicate (TSH), which then becomes the supramolecular building block for the fabrication of a metallocage. Six homochiral TSH supramolecular building blocks, either left (M)-handed or right (P)-handed, are connected by four linking nickel atoms to generate M-6 and P-6 discrete racemic cage molecules (M-6 - cage with six M-TSHs; P-6 - cage with six P-TSHs). The crystal packing of the racemic cages was characterized by single-crystal X-ray diffraction. An additional cobalt-based molecular cage with 5-methylisophthalate bridging ligands was synthesized for host-guest interaction studies. The methyl groups in Co- and Ni-TSH can act as guest units to be accommodated in the cone-shaped metal clusters (host) of an adjacent cage.
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