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1. High-Resolution X-ray Photoelectron Spectroscopy of Organometallic (C 5 H 4 SiMe 3 ) 3 Ln III and [(C 5 H 4 SiMe 3 ) 3 Ln II ] 1– Complexes (Ln = Sm, Eu, Gd, Tb)

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   Huh, Daniel N. ; Bruce, Jared P. ; Ganesh Balasubramani, Sree ; Ciccone, Sierra R. ; Furche, Filipp ; Hemminger, John C. ; Evans, William J. ( October 2021 , Journal of the American Chemical Society)
2. Tuning the Intermediate Valence Behavior in the Zintl Compound Yb 14 ZnSb 11 by Incorporation of RE 3+ [Yb 14–x RE x ZnSb 11 (0.2 ≤ x ≤ 0.7), RE = Sc, Y, La, Lu and Gd]

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3. Thermally Induced Disorder–Order Phase Transition of Gd 2 Hf 2 O 7 :Eu 3+ Nanoparticles and Its Implication on Photo- and Radioluminescence

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4. 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

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5. Evaluating electrochemical accessibility of 4f n 5d 1 and 4f n+1 Ln( ii ) ions in (C 5 H 4 SiMe 3 ) 3 Ln and (C 5 Me 4 H) 3 Ln complexes

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   The reduction potentials (reported vs. Fc + /Fc) for a series of Cp′ 3 Ln complexes (Cp′ = C 5 H 4 SiMe 3 , Ln = lanthanide) were determined via electrochemistry in THF with [ n Bu 4 N][BPh 4 ] as the supporting electrolyte. The Ln( iii )/Ln( ii ) reduction potentials for Ln = Eu, Yb, Sm, and Tm (−1.07 to −2.83 V) follow the expected trend for stability of 4f 7 , 4f 14 , 4f 6 , and 4f 13 Ln( ii ) ions, respectively. The reduction potentials for Ln = Pr, Nd, Gd, Tb, Dy, Ho, Er, and Lu, that form 4f n 5d 1 Ln( ii ) ions ( n = 2–14), fall in a narrow range of −2.95 V to −3.14 V. Only cathodic events were observed for La and Ce at −3.36 V and −3.43 V, respectively. The reduction potentials of the Ln( ii ) compounds [K(2.2.2-cryptand)][Cp′ 3 Ln] (Ln = Pr, Sm, Eu) match those of the Cp′ 3 Ln complexes. The reduction potentials of nine (C 5 Me 4 H) 3 Ln complexes were also studied and found to be 0.05–0.24 V more negative than those of the Cp′ 3 Ln compounds. 

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