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Active Metal Template Synthesis and Characterization of a Nanohoop [ c 2]Daisy Chain Rotaxane
Author(s) -
Van Raden Jeff M.,
Jarenwattana Nanette N.,
Zakharov Lev N.,
Jasti Ramesh
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202001389
Subject(s) - daisy chain , rotaxane , molecule , molecular machine , metal , characterization (materials science) , materials science , nanotechnology , chemistry , stereochemistry , supramolecular chemistry , organic chemistry , computer science , computer hardware
Molecules and materials that demonstrate large amplitude responses to minor changes in their local environment play an important role in the development of new forms of nanotechnology. Molecular daisy chains are a type of a mechanically interlocked molecule that are particularly sensitive to such changes in which, in the presence of certain stimuli, the molecular linkage enables muscle‐like movement between a reduced‐length contracted form and an increased‐length expanded form. To date, all reported syntheses of molecular daisy chains are accomplished via passive‐template methods, resulting in a majority of structures being switchable only through the addition of an exogenous stimuli such as metal ions or changes in pH. Here, we describe a new approach to these structural motifs that exploits a multi‐component active‐metal template synthesis to mechanically interlock two pi‐rich nanohoop macrocycles into a molecular daisy chain that undergoes large conformational changes using thermal energy.