More Like this

1. Solid-State End-On to Side-On Isomerization of (N═N) 2– in {[(R 2 N) 3 Nd] 2 N 2 } 2– (R = SiMe 3 ) Connects In Situ Ln III (NR 2 ) 3 /K and Isolated [Ln II (NR 2 ) 3 ] 1– Dinitrogen Reduction

   https://doi.org/10.1021/jacs.2c06716  

   Chung, Amanda B. ; Rappoport, Dmitrij ; Ziller, Joseph W. ; Cramer, Roger E. ; Furche, Filipp ; Evans, William J. ( September 2022 , Journal of the American Chemical Society)
2. Solid-State 45 Sc NMR Studies of Cp* 2 Sc–OR (R = CMe 2 CF 3 , CMe(CF 3 ) 2 , C(CF 3 ) 3 , SiPh 3 ) and Relationship to the Structure of Cp* 2 Sc-Sites Supported on Partially Dehydroxylated Silica

   https://doi.org/10.1021/acs.organomet.9b00840  

   Culver, Damien B. ; Huynh, Winn ; Tafazolian, Hosein ; Conley, Matthew P. ( April 2020 , Organometallics)
3. Recent Advances in Conduction Mechanisms, Synthesis Methods, and Improvement Strategies for Li 1+ x Al x Ti 2− x (PO 4 ) 3 Solid Electrolyte for All‐Solid‐State Lithium Batteries

   https://doi.org/10.1002/aenm.202203440  

   Wu, Pengfei ; Zhou, Weiwei ; Su, Xin ; Li, Jianyu ; Su, Min ; Zhou, Xiaochong ; Sheldon, Brian W. ; Lu, Wenquan ( December 2022 , Advanced Energy Materials)

   With the increasing use of Li batteries for storage, their safety issues and energy densities are attracting considerable attention. Recently, replacing liquid organic electrolytes with solid‐state electrolytes (SSE) has been hailed as the key to developing safe and high‐energy‐density Li batteries. In particular, Li_1+xAl_xTi_2−x(PO4)₃(LATP) has been identified as a very attractive SSE for Li batteries due to its excellent electrochemical stability, low production costs, and good chemical compatibility. However, interfacial reactions with electrodes and poor thermal stability at high temperatures severely restrict the practical use of LATP in solid‐state batteries (SSB). Herein, a systematic review of recent advances in LATP for SSBs is provided. This review starts with a brief introduction to the development history of LATP and then summarizes its structure, ion transport mechanism, and synthesis methods. Challenges (e.g., intrinsic brittleness, interfacial resistance, and compatibility) and corresponding solutions (ionic substitution, additives, protective layers, composite electrolytes, etc.) that are critical for practical applications are then discussed. Last, an outlook on the future research direction of LATP‐based SSB is provided.

    

   more » « less
4. The β‐Agostic Structure in (C 5 Me 5 ) 2 Sc(CH 2 CH 3 ): Solid‐State NMR Studies of (C 5 Me 5 ) 2 Sc−R (R=Me, Ph, Et)

   https://doi.org/10.1002/anie.201805738  

   Culver, Damien B. ; Huynh, Winn ; Tafazolian, Hosein ; Ong, Ta‐Chung ; Conley, Matthew P. ( July 2018 , Angewandte Chemie International Edition)

   Multinuclear solid‐state NMR studies of Cp*₂Sc−R (Cp*=pentamethylcyclopentadienyl; R=Me, Ph, Et) and DFT calculations show that the Sc−Et complex contains a β‐CH agostic interaction. The static central transition⁴⁵Sc NMR spectra show that the quadrupolar coupling constants (C_q) follow the trend of Ph≈Me>Et, indicating that the Sc−R bond is different in Cp*₂Sc−Et compared to the methyl and phenyl complexes. Analysis of the chemical shift tensor (CST) shows that the deshielding experienced by Cβ in Sc−CH₂CH₃is related to coupling between the filled σ_C‐Corbital and the vacantorbital.

    

   more » « less
5. The β‐Agostic Structure in (C 5 Me 5 ) 2 Sc(CH 2 CH 3 ): Solid‐State NMR Studies of (C 5 Me 5 ) 2 Sc−R (R=Me, Ph, Et)

   https://doi.org/10.1002/ange.201805738  

   Culver, Damien B. ; Huynh, Winn ; Tafazolian, Hosein ; Ong, Ta‐Chung ; Conley, Matthew P. ( July 2018 , Angewandte Chemie)

   Multinuclear solid‐state NMR studies of Cp*₂Sc−R (Cp*=pentamethylcyclopentadienyl; R=Me, Ph, Et) and DFT calculations show that the Sc−Et complex contains a β‐CH agostic interaction. The static central transition⁴⁵Sc NMR spectra show that the quadrupolar coupling constants (C_q) follow the trend of Ph≈Me>Et, indicating that the Sc−R bond is different in Cp*₂Sc−Et compared to the methyl and phenyl complexes. Analysis of the chemical shift tensor (CST) shows that the deshielding experienced by Cβ in Sc−CH₂CH₃is related to coupling between the filled σ_C‐Corbital and the vacantorbital.

    

   more » « less