Azotriptycenes: Photoswitchable Molecular Brakes

Stockerl WJ, Reißenweber L, Gerwien A, Bach N, Thumser S, Mayer P, Gschwind RM, Dube H (2023)

Publication Type: Journal article

Publication year: 2023

Journal

DOI: 10.1002/chem.202302267

Abstract

The control of molecular motions is a central topic of molecular machine research. Molecular brakes are fundamental building blocks towards such goal as they allow deliberately decelerating specific motions after an outside stimulus is applied. Here we present azotriptycenes as structural framework for light-controlled molecular brakes. The intrinsic kinetics and their changes upon azotriptycene isomerization are scrutinized comprehensively by a mixed theoretical and variable temperature NMR approach. With azotriptycenes C−N bond rotation rates can be decelerated or accelerated reversibly by up to five orders of magnitude. Rate change effects are highly localized and are strongest for the C−N bond connecting a triptycene rotor fragment to the central diazo group. The detailed mechanistic insights provide a solid basis for further conscious design and applications in the future.

Authors with CRIS profile

Involved external institutions

Ludwig-Maximilians-Universität (LMU) Germany (DE) Universität Regensburg Germany (DE)

How to cite

APA:

Stockerl, W.J., Reißenweber, L., Gerwien, A., Bach, N., Thumser, S., Mayer, P.,... Dube, H. (2023). Azotriptycenes: Photoswitchable Molecular Brakes. Chemistry - A European Journal. https://doi.org/10.1002/chem.202302267

MLA:

Stockerl, Willibald J., et al. "Azotriptycenes: Photoswitchable Molecular Brakes." Chemistry - A European Journal (2023).

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