An Unprecedented Stimuli-Controlled Single-Crystal Reversible Phase Transition of a Metal–Organic Framework and Its Application to a Novel Method of Guest Encapsulation

Fangchang Tan, Ana López-Periago, Mark E. Light, Jordi Cirera, Eliseo Ruiz, Alejandro Borrás, Francesc Teixidor, Clara Viñas, Concepción Domingo, José Giner Planas

    Research output: Contribution to journalArticleResearchpeer-review

    14 Citations (Scopus)

    Abstract

    © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The flexibility and unexpected dynamic behavior of a third-generation metal–organic framework are described for the first time. The synthetic strategy is based on the flexibility and spherical shape of dipyridyl-based carborane linkers that act as pillars between rigid Co/BTB (BTB: 1,3,5-benzenetricarboxylate) layers, providing a 3D porous structure (1). A phase transition of the solid can be induced to generate a new, nonporous 2D structure (2) without any loss of the carborane linkers. The structural transformation is visualized by snapshots of the multistep single-crystal-to-single-crystal transformation by single-crystal and powder X-ray diffraction. Poor hydrogen bond acceptors such as MeOH, CHCl3 or supercritical CO2 induce such a 3D to 2D transformation. Remarkably, the transformation is reversible and the 2D phase 2 is further converted back into 1 by heating in dimethylformamide. The energy requirements involved in such processes are investigated using periodic density functional theory calculations. As a proof of concept for potential applications, encapsulation of C60 is achieved by trapping this molecule during the reversible 2D to 3D phase transition, whereas no adsorption is observed by straight solvent diffusion into the pores of the 3D phase.
    Original languageEnglish
    Article number1800726
    JournalAdvanced Materials
    Volume30
    Issue number29
    DOIs
    Publication statusPublished - 19 Jul 2018

    Keywords

    • carboranes
    • flexible porous materials
    • metal–organic frameworks
    • soft porous crystals

    Fingerprint Dive into the research topics of 'An Unprecedented Stimuli-Controlled Single-Crystal Reversible Phase Transition of a Metal–Organic Framework and Its Application to a Novel Method of Guest Encapsulation'. Together they form a unique fingerprint.

    Cite this