Controlling the Alignment of 1D Nanochannel Arrays in Oriented Metal-Organic Framework Films for Host-Guest Materials Design

Here, we successfully prepared macroscopically oriented films of Cu-based pillar-layered MOFs (Cu2(Linker)2DABCO) having regularly ordered 1D nanochannels. The direction of 1D nanochannels was controllable by optimizing the crystal growth process; 1D nanochannels either perpendicular or parallel to substrates, which offer molecular-scale pore arrays for a macroscopic alignment of functional guest molecules in the desired direction. We also showed the fabrication of oriented Cu2(Linker)2DABCO MOF patterns, where the direction of 1D nanochannels is controllable on individual locations on the same substrate. These Cu2(Linker)2DABCO MOF films and patterns with controlled orientation are importante steps towards the development of MOF film-based applications such as sensors and electrical/optical devices because functionalities derived from the accommodated guest species in their 1D nanochannels are optimized for the rational direction on the desired substrate for the device fabrication.