Hierarchical assembly of uranyl metallacycles involving macrocyclic hosts

Actinide metallacycles are an emerging class of functional coordination assemblies, but multi-level assembly from metallacycle units toward hierarchical supramolecular structures are still rarely investigated. In this work, we put forward a novel supramolecular inclusion-based method through introdu...

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Bibliographic Details
Published in:Chinese chemical letters 2022-07, Vol.33 (7), p.3539-3542
Main Authors: Liang, Yuanyuan, Mei, Lei, Jin, Qiuyan, Geng, Junshan, Wang, Jingyang, Liu, Kang, Hu, Kongqiu, Yu, Jipan, Shi, Weiqun
Format: Article
Language:English
Subjects:
Coordination self-assembly
Cucurbituril
Hierarchical structure
Metallacycle
Molecular necklace
Uranyl
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Summary:Actinide metallacycles are an emerging class of functional coordination assemblies, but multi-level assembly from metallacycle units toward hierarchical supramolecular structures are still rarely investigated. In this work, we put forward a novel supramolecular inclusion-based method through introducing two macrocyclic hosts, cucurbit[7]uril (CB[7]) and cucurbit[8]uril (CB[8]) to facilitate hierarchical assembly of uranyl metallacycles with higher complexity, and successfully prepare two different kinds of uranyl metallacycle-based complexes with intriguing hierarchical structures, a CB[7]-based four-member molecular necklace ([4]MN) and a CB[8]-involved ring-in-ring supramolecular polymer chain. The results obtained here prove the feasibility of supramolecular inclusion for regulating coordination assembly of uranyl metallacycles and related hierarchical structures. It is believed that this method can be used to achieve the construction of actinide coordination assemblies with higher structural complexity. A supramolecular inclusion-based method through introducing two different kinds of macrocyclic hosts, cucurbit[7]uril (CB[7]) and cucurbit[8]uril (CB[8]) are proposed to facilitate hierarchical assembly of uranyl metallacycles with higher complexity. [Display omitted]
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2022.03.092