Learn more about our approaches to novel redox-active, magnetic, and porous materials here.
Better energetic matching between nodes and linkers should increase electrical conductivity and magnetic coupling in the resulting materials. Sulfur-based linkers have a better energetic match to transition metal nodes than more common oxygen- or nitrogen-based ligands. We are developing new synthetic strategies to simplify the use of highly reactive S-based linkers in making new conductive materials.
Redox-active nodes and linkers
Redox reactions on linkers and nodes allow materials to store electrical charge in batteries and supercapacitors. The use of redox-active nodes and linkers also allows facile redox doping of materials to improve electrical conductivity. We are pursuing new redox-active linkers and also exploring the use of redox-active metal clusters as nodes.
Installation of radical linkers
By inserting an S = 1/2 linker, direct exchange between paramagnetic metal nodes can be realized via coupling to the bridging radical ligand, allowing for long-distance magnetic ordering. Simultaneously, fusion of open-shell linkers and metal nodes gives rise to systems with delocalized charge carriers. Studying the synergistic effects of magnetism and charge transport could pave the way to next generation spintronics devices.
“Sulfonate-Ligated Coordination Polymers Incorporating Paramagnetic Transition Metals” Kawamura, A.; Filatov, A. S.; Anderson, J. S. Eur. J. Inorg. Chem. 2019, 21, 2613-2617. Read it!
“Slow Magnetic Relaxation of Co(II) Single-Chains Embedded within Metal-Organic Superstructures” Kawamura, A.; Filatov, A. S.; Anderson, J. S.; Jeon, I-R. Inorg. Chem. 2019, 58, 3764-3773. Read it!
“Redox-Active 1D Coordination Polymers of Iron-Sulfur Clusters” *Horwitz, N. E.; *Xie, J.; Filatov, A. S.; Papoular, R. J.; Shepard, W. E.; Grahn, M. P.; Gilder, C.; Anderson, J. S. J. Am. Chem. Soc. 2019, 141, 3940-3951. Read it!
“Incorporation of Pyrazine and Bipyridine Linkers with High-Spin Fe(II) and Co(II) in a Metal-Organic Framework” Kawamura, A.; Greenwood, A. R.; Filatov, A. S.; Gallagher, A. T.; Galli, G.; Anderson J. S. Inorg. Chem. 2017, 56, 3349-3356. Read it!