AI Article Synopsis
- Researchers are developing complex, highly-intertwined structures called "ravel structures" at the nanoscale, which face significant synthesis challenges.
- A new ligand (L1) with specific chemical bonds and large building blocks was created to facilitate the self-assembly of these structures.
- Two unique icosanuclear molecular 4-ravels were produced, showcasing a novel structural transformation between the 4-ravel and a metallocage, confirmed by advanced imaging techniques like X-ray crystallography and NMR spectroscopy.
Article Abstract
Intricately interwoven topologies are continually being synthesized and are ultimately equally versatile and significant at the nanoscale level; however, reports concerning ravel structures, which are highly entwined new topological species, are extremely rare and fraught with tremendous synthesis challenges. To solve the synthesis problem, a tetrapodontic pyridine ligand L1 with two types of olefinic bond units and two Cp*M-based building blocks (E1, M=Rh; E2, M=Ir) featuring large conjugated planes was prepared to perform the self-assembly. Two unprecedented [5+10] icosanuclear molecular 4-ravels containing four crossings were obtained by parallel-displaced π⋅⋅⋅π interactions in a single-step strategy. Remarkably, reversible structural transformations between the 4-ravel and the corresponding metallocage could be realized by concentration changes and solvent- and guest-induced effects. X-ray crystallographic data and NMR spectroscopy provide full confirmation of these phenomena.
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| http://dx.doi.org/10.1002/anie.202301516 | DOI Listing |
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