Liquid- and Gas-Phase Diffusion of Ferrocene in Thin Films of Metal-Organic Frameworks

Materials

Wencai Zhou²  Christof Wöll²  Lars Heinke¹ 

[1] Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany;

关键词: metal-organic frameworks;    diffusion;    mass transfer;    gas phase;    liquid phase;   

DOI  :  10.3390/ma8063767

来源: mdpi

【 摘 要 】

The mass transfer of the guest molecules in nanoporous host materials, in particular in metal-organic frameworks (MOFs), is among the crucial features of their applications. By using thin surface-mounted MOF films in combination with a quartz crystal microbalance (QCM), the diffusion of ferrocene vapor and of ethanolic and hexanic ferrocene solution in HKUST-1 was investigated. For the first time, liquid- and gas-phase diffusion in MOFs was compared directly in the identical sample. The diffusion coefficients are in the same order of magnitude (~10⁻¹⁶ m²·s⁻¹), whereas the diffusion coefficient of ferrocene in the empty framework is roughly 3-times smaller than in the MOF which is filled with ethanol or n-hexane.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.