Induced Fit and Mobility of Cycloalkanes within Nanometer-Sized Confinements at 5 K

Aisha Ahsan*, Luiza Buimaga-Iarinca, Thomas Nijs, Sylwia Nowakowska, Rejaul Sk, S.Fatemeh Mousavi, Mehdi Heydari, Meike Stöhr, Sameena Zaman, Cristian Morari, Lutz H Gade*, Thomas A. Jung*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

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Host–guest architectures provide ideal systems for investigating site-specific physical and chemical effects. Condensation events in nanometer-sized confinements are particularly interesting for the investigation of intermolecular and molecule–surface interactions. They may be accompanied by conformational adjustments representing induced fit packing patterns. Here, we report that the symmetry of small clusters formed upon condensation, their registry with the substrate, their lateral packing, and their adsorption height are characteristically modified by the packing of cycloalkanes in confinements. While cyclopentane and cycloheptane display cooperativity upon filling of the hosting pores, cyclooctane and to a lesser degree cyclohexane diffusively redistribute to more favored adsorption sites. The dynamic behavior of cyclooctane is surprising at 5 K given the cycloalkane melting point of >0 °C. The site-specific modification of the interaction and behavior of adsorbates in confinements plays a crucial role in many applications of three-dimensional porous materials as gas storage agents or catalysts/biocatalysts.
Originele taal-2English
Pagina's (van-tot)7504-7513
Aantal pagina's10
TijdschriftThe Journal of Physical Chemistry Letters
StatusPublished - 2022

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