Active Metal Template Synthesis and Characterization of a Nanohoop [c2]Daisy Chain Rotaxane.

Autor: Van Raden JM; University of Oregon, Eugene, Oregon, OR-97403, USA., Jarenwattananon NN; University of Oregon, Eugene, Oregon, OR-97403, USA., Zakharov LN; University of Oregon, Eugene, Oregon, OR-97403, USA., Jasti R; University of Oregon, Eugene, Oregon, OR-97403, USA.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2020 Aug 12; Vol. 26 (45), pp. 10205-10209. Date of Electronic Publication: 2020 Jul 13.
DOI: 10.1002/chem.202001389
Abstrakt: 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.
(© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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