Abstract
The layer‐by‐layer (LbL) method is a well‐established method for the growth of surface‐attached metal–organic frameworks (SURMOFs). Various experimental parameters, such as surface functionalization or temperature, have been identified as essential in the past. In this study, inspired by these recent insights regarding the LbL SURMOF growth mechanism, the impact of reactant solutions concentration on LbL growth of the Cu2(F4bdc)2(dabco) SURMOF (F4bdc2−=tetrafluorobenzene‐1,4‐dicarboxylate and dabco=1,4‐diazabicyclo‐[2.2.2]octane) in situ by using quartz‐crystal microbalance and ex situ with a combination of spectroscopic, diffraction and microscopy techniques was investigated. It was found that number, size, and morphology of MOF crystallites are strongly influenced by the reagent concentration. By adjusting the interplay of nucleation and growth, we were able to produce densely packed, yet thin films, which are highly desired for a variety of SURMOF applications.
Highlights
The layer-by-layer (LbL) method is a well-established method for the growth of surface-attached metal– organic frameworks (SURMOFs)
Publications describe the LbL surface-mounted metal–organic frameworks (SURMOFs) growth as a Frank van der Merve process,[13,14,15] but it is generally accepted today that the LbL growth is a Volmer–Weber process resulting in surfaces covered by solitary crystals.[17,20,22,23,24]
In the present study, we address parameters that allow formation of thin but closely packed SURMOF layers being produced by using the LbL technique in a reasonable time and with a minimized material usage
Summary
The layer-by-layer (LbL) method is a well-established method for the growth of surface-attached metal– organic frameworks (SURMOFs).
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