AUTHOR=Wu Gui-Yuan , Zhu Hong-Juan , Pan Fang-Fang , Sheng Xiao-Wei , Zhang Ming-Rui , Zhang Xianyi , Yao Guangxin , Qu Hang , Lu Zhou 

TITLE=Self-Assembly of [3]Catenane and [4]Catenane Based on Neutral Organometallic Scaffolds

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.805229

DOI=10.3389/fchem.2021.805229

ISSN=2296-2646

ABSTRACT=Transition metal-mediated templating and self-assembly have shown great potential to construct mechanically interlocked molecules. Herein we describe the formation of bimetallic [3]catenane and [4]catenane based on neutral organometallic scaffold via the orthogonality of platinum‐to‐oxygen coordination-driven self-assembly and copper(I) template-directed strategy of a [2]pseudorotaxane. The structures of these bimetallic [3]catenane and [4]catenane were characterized by multinuclear NMR {1H and 31P} spectroscopy, electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS). In addition, single-crystal X-ray analyses of the [3]catenane revealed two asymmetric [2]pseudorotaxane units inside the metallocycle. Tubular structures were showed through the stacking of individual [3]catenane molecules by means of the strong π-π interactions.