KIT | KIT-Bibliothek | Impressum | Datenschutz

Switching the Proton Conduction in MOFs by Light

Müller, Kai; Helfferich, Julian; Zhao, Fangli; Verma, Rupal; Kanj, Anemar Bruno; Meded, Velimir; Bléger, David; Wenzel, Wolfgang; Heinke, Lars

Abstract (englisch):

Smart MOF materials can be prepared by incorporation of stimuli-responsive molecules, changing their properties upon exposure to external stimulus. Stimuli such as like temperature, pH or light attract particular interest, whereat light enables highest spatial resolution and fast response over long distances. One of the most frequently investigated photochromic molecule is azobenzene, which can isomerize from its non-polar trans state to the polar cis state. While plain azobenzene requires UV light for its isomerization, fluorine-functionalized molecules enable the reversible trans-cis switching with visible light only, avoiding UV. By incorporating fluorinated azobenzene as side groups in the MOF structure, the ability for photoisomerization is preserved and integrates photoswitchable, smart properties to the MOF material. In that way, the pore structure and the size of the pore opening as well as the polarity of the pore environment can be photo-switched. This results in a remote-control of the interaction of the MOF material with the guest molecules in the pores, controlling, e.g., the adsorption and diffusion properties. This can be used for membranes with remote-controllable permeation and separation factors. ... mehr

Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Institut für Nanotechnologie (INT)
Publikationstyp Vortrag
Publikationsdatum 13.12.2018
Sprache Englisch
Identifikator KITopen-ID: 1000089307
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Veranstaltung 6th International Conference on Metal-Organic Frameworks & Open Framework Compounds (MOF 2018), Auckland, Neuseeland, 09.12.2018 – 13.12.2018
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page