Emily Storck
Speaker's Institution
Colorado State University
4:00 PM
Chemistry A101
Mixer Time
3:45 PM
Mixer Time
Chemistry B101E
Calendar (ICS) Event
Additional Information

Literature Seminar:

Oxynitrides and their ability to be synthesized are an important facet in the solid-state chemistry field. Their properties are more tunable than in their single-anion counterparts as anions exhibit different characteristics (i.e. electronegativity) that contribute to the overall properties of the material. However, difficulty in their synthesis arises due to the intrinsic stability of nitrogen. The current technique to make these materials requires high-temperature (800-1300°C) ammonolysis (treatment with NH3). However, this technique involves a highly reducing atmosphere and N3- has low ability to incorporate into the lattice due to its large charge. The idea of a labile ligand as seen in coordination chemistry is extended in the solid-state to exchange the labile hydride in BaTiO3-xHx for nitrogen to make BaTiO3-xN2x/3 (an oxynitride). The H ion can be exchanged with N3- through low temperature (<500°C) treatment with NH3. In this talk, I will discuss why this exchange occurs and what characterization techniques were done to prove this exchange. The extension of this low-temperature hydride technique to other systems will also be discussed.

Yajima, T.; Takeiri, F.; Aidzu, K.; Akamatsu, H.; Fujita, K.; Yoshimune, W.; Ohkura, M.; Lei, S.; Gopalan, V.; Tanaka, K.; Brown, C.M.; Green, M.A.; Yamamoto, T.; Kobayashi, Y.; Kageyama, H. A labile hydride strategy for the synthesis of heavily nitridized BaTiO3. Nat. Chem. 2015, 7, 1017-1023