Synthesis methodologies of conductive 2D conjugated metal-organic frameworks
Jinwei Zhang, Lipiao Bao*, Xing Lu*
Chinese Journal of Structural Chemistry
https://doi.org/10.1016/j.cjsc.2024.100459
Metal-organic frameworks (MOFs), assembled periodically by coordinating inorganic metal ions and organic motifs, have arisen widespreadcuriosity and intensive investigation owing to their tailorable electronicproperties and well-defined topological structure. However, the majorityof MOFs are intrinsically dielectric or insulative [1] and typically form as3D bulk or powder crystals, making them incompatible with complementary metal-oxide semiconductor (CMOS) techniques. In recent years,layer-stacked two-dimensional conjugated MOFs (2D c-MOFs),composed of planar conjugated ligands and linkages [2], have demonstrated high in-plane π conjugation and weak out-of-plane van der Waalsinteractions, due to their long-range electron delocalization over metalions and ligands [3]. As a result, highly tunable band gaps from semiconductor to conductor, modulable porosity from micropore to macropore and versatile processability into conductive 2D thin films withcontrollable lateral thickness and domain size are presented, renderingcharming potential for applications in (opto-)electronics compared withclassic 2D metal oxide, chalcogenide and crystalline polymer materials.To improve interfacial charge-transport and precisely tune the chargeextraction and band alignment of 2D c-MOFs in (opto-)electronic devices[4], developing highly efficient synthetic methods of 2D c-MOFs is ofutmost importance.
