| AVS 64th International Symposium & Exhibition | |
| Surface Science Division | Tuesday Sessions |
| Session SS+HC-TuM |
| Session: | Controlling Mechanisms of Surface Chemical Reactions |
| Presenter: | Andreas Terfort, University of Frankfurt, Germany |
| Authors: | X.-J. Yu, University of Frankfurt, Germany J.-L. Zhuang, Guizhou Normal University, P.R. China A. Terfort, University of Frankfurt, Germany |
| Correspondent: | Click to Email |
The surface deposition of metal-organic frameworks (MOFs) opens the opportunity to use these highly designable materials for applications in electronics, data storage, sensing or biointerfaces. Several protocols have been reported to grow or attach MOFs onto a variety of surfaces, but nevertheless, the bandwidth of successfully deposited MOFs is still extremely limited: Besides the archetypical HKUST-1 and ZIF-5, only a family of tetragonal layer systems (with or without pillars) could be grown into well-defined SURMOF layers [1]. Although with some of these systems impressive results for different devices, such as photovoltaic cells, have been reported, the limitation to these classes of MOFs is unsatisfactory.
In this talk, we wish to discuss that the lack of success with other systems is related to the fact that most projects relied solely on the well-established surface-template effects, in which the coordination of surface-bound, functional groups to the metal SBU defines not only the binding mode but the orientation of the whole film. We will show that the rules on the surface differ from the ones in solution by a reduced number of trajectories, which in turn hamper certain reactions [2]. It is also of importance to keep in mind the different surface energies of the crystal surfaces, which can dictate a reorientation of the preformed system by Ostwald ripening during the deposition process [3]. All these processes involve different activation energies, the careful control of which opens the opportunity to grow well-oriented films of MOF systems, which have behaved notoriously difficult up to now.
References
[1] Zhuang, J.-L.; Terfort, A.; Wöll, C. Coord. Chem. Rev. 307 (2016) 391-424.
[2] Zhuang, J.-L.; Kind, M.; Grytz, C. M.; Farr, F.; Diefenbach,M.; Tussupbayev, S.; Holthausen, M. C.; Terfort, A. J. Am. Chem. Soc. 137 (2015) 8237-8243.
[3] Yu, X.-J.; Zhuang, J.-L.; Scherr,J.; Abu-Husein,T.; Terfort, A. Angew. Chem. Int. Ed. 29 (2016) 8348-8352.