Wydział Chemii

Kuntrapakam Hema

Angela B. Grommet

Michał J. Białek

Jinhua Wang

Laura Schneider

Christoph Drechsler

Oksana Yanshyna

Yael Diskin-Posner

Guido H. Clever

Rafal Klajn

2023

Journal of the American Chemical Society

145

24755-24764

10.1021/jacs.3c08666

Naukowa

Angielski

Artykuł

The architecture of self-assembled host molecules can profoundly affect the properties of the encapsulated guests. For example, a rigid cage with small windows can efficiently protect its contents from the environment; in contrast, tube-shaped, flexible hosts with large openings and an easily accessible cavity are ideally suited for catalysis. Here, we report a “Janus” nature of a Pd₆L₄ coordination host previously reported to exist exclusively as a tube isomer (T). We show that upon encapsulating various tetrahedrally shaped guests, T can reconfigure into a cage-shaped host (C) in quantitative yield. Extracting the guest affords empty C, which is metastable and spontaneously relaxes to T, and the T⇄C interconversion can be repeated for multiple cycles. Reversible toggling between two vastly different isomers paves the way toward controlling functional properties of coordination hosts “on demand”.

Encapsulation, Equilibrium, Molecular structure, Nuclear magnetic resonance spectroscopy, Palladium

CC-BY

http://dx.doi.org/10.1021/jacs.3c08666

https://www.acs.org/content/acs/en.html