In:
Angewandte Chemie, Wiley, Vol. 135, No. 14 ( 2023-03-27)
Abstract:
Use of abiotic chemical systems for understanding higher order superstructures is challenging. Here we report a ring‐in‐ring(s) system comprising a hydrogen‐bonded macrocycle and cyclobis(paraquat‐ o ‐phenylene) tetracation ( o ‐Box ) or cyclobis(paraquat‐ p ‐phenylene) tetracation ( CBPQT 4+ , p ‐Box ) that assembles to construct discrete higher order structures with adaptive conformation. As indicated by mass spectrometry, computational modeling, NMR spectroscopy, and single‐crystal X‐ray diffraction analysis, this ring‐in‐ring(s) system features the box‐directed aggregation of multiple macrocycles, leading to generation of several stable species such as H4G ( 1 a / o ‐Box ) and H5G ( 1 a / o ‐Box ). Remarkably, a dimeric shish‐kebab‐like ring‐in‐rings superstructure H7G2 ( 1 a / o ‐Box ) or H8G2 ( 1 a / p ‐Box ) is formed from the coaxial stacking of two ring‐in‐rings units. The formation of such unique dimeric superstructures is attributed to the large π‐surface of this 2D planar macrocycle and the conformational variation of both host and guest.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v135.14
DOI:
10.1002/ange.202216690
Language:
English
Publisher:
Wiley
Publication Date:
2023
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