Details

Autor(en) / Beteiligte

• Dou, Jin-Hu
• Arguilla, Maxx Q
• Luo, Yi
• Li, Jian
• Zhang, Weizhe
• Sun, Lei
• Mancuso, Jenna L
• Yang, Luming
• Chen, Tianyang
• Parent, Lucas R
• Skorupskii, Grigorii
• Libretto, Nicole J
• Sun, Chenyue
• Yang, Min Chieh
• Dip, Phat Vinh
• Brignole, Edward J
• Miller, Jeffrey T
• Kong, Jing
• Hendon, Christopher H
• Sun, Junliang
• Dincă, Mircea

Titel

Atomically precise single-crystal structures of electrically conducting 2D metal-organic frameworks

Ist Teil von

• Nature materials, 2021-02, Vol.20 (2), p.222-228

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Nature Journals Online

Beschreibungen/Notizen

• Electrically conducting 2D metal-organic frameworks (MOFs) have attracted considerable interest, as their hexagonal 2D lattices mimic graphite and other 2D van der Waals stacked materials. However, understanding their intrinsic properties remains a challenge because their crystals are too small or of too poor quality for crystal structure determination. Here, we report atomically precise structures of a family of 2D π-conjugated MOFs derived from large single crystals of sizes up to 200 μm, allowing atomic-resolution analysis by a battery of high-resolution diffraction techniques. A designed ligand core rebalances the in-plane and out-of-plane interactions that define anisotropic crystal growth. We report two crystal structure types exhibiting analogous 2D honeycomb-like sheets but distinct packing modes and pore contents. Single-crystal electrical transport measurements distinctively demonstrate anisotropic transport normal and parallel to the π-conjugated sheets, revealing a clear correlation between absolute conductivity and the nature of the metal cation and 2D sheet packing motif.