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1. Homoleptic Perchlorophenyl “Ate” Complexes of Thorium(IV) and Uranium(IV)

   https://doi.org/10.1021/acs.inorgchem.1c01686  

   Ordoñez, Osvaldo; Yu, Xiaojuan; Wu, Guang; Autschbach, Jochen; Hayton, Trevor W. (August 2021, Inorganic Chemistry)
2. Synthesis and Characterization of Isostructural Th(IV) and U(IV) Pyridine Dipyrrolide Complexes

   https://doi.org/10.1021/acs.inorgchem.3c04391  

   Valerio, Leyla R; Hakey, Brett M; Leary, Dylan C; Stockdale, Erin; Brennessel, William W; Milsmann, Carsten; Matson, Ellen M (February 2024, Inorganic Chemistry)

   A series of pyridine dipyrrolide actinide(IV) complexes, (MesPDPPh)AnCl2(THF) and An(MesPDPPh)2 (An = U, Th, where (MesPDPPh) is the doubly deprotonated form of 2,6-bis(5-(2,4,6-trimethylphenyl)-3-phenyl-1H-pyrrol-2-yl)pyridine), have been prepared. Characterization of all four complexes has been performed through a combination of solid- and solution-state methods, including elemental analysis, single crystal X-ray diffraction, and electronic absorption and nuclear magnetic resonance spectroscopies. Collectively, these data confirm the formation of the mono- and bis-ligated species. Time-dependent density functional theory has been performed on all four An(IV) complexes, providing insight into the nature of electronic transitions that are observed in the electronic absorption spectra of these compounds. Room temperature, solution-state luminescence of the actinide complexes is presented. Both Th(IV) derivatives exhibit strong photoluminescence; in contrast, theU(IV) species are nonemissive. 

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3. A High‐Valent Manganese(IV)–Oxo–Cerium(IV) Complex and Its Enhanced Oxidizing Reactivity

   https://doi.org/10.1002/anie.201910032  

   Karmalkar, Deepika G.; Sankaralingam, Muniyandi; Seo, Mi Sook; Ezhov, Roman; Lee, Yong‐Min; Pushkar, Yulia N.; Kim, Won‐Suk; Fukuzumi, Shunichi; Nam, Wonwoo (September 2019, Angewandte Chemie International Edition)

   Abstract A mononuclear nonheme manganese(IV)–oxo complex binding the Ce⁴⁺ion, [(dpaq)Mn^IV(O)]⁺–Ce⁴⁺(1‐Ce⁴⁺), was synthesized by reacting [(dpaq)Mn^III(OH)]⁺(2) with cerium ammonium nitrate (CAN).1‐Ce⁴⁺was characterized using various spectroscopic techniques, such as UV/Vis, EPR, CSI‐MS, resonance Raman, XANES, and EXAFS, showing an Mn−O bond distance of 1.69 Å with a resonance Raman band at 675 cm⁻¹. Electron‐transfer and oxygen atom transfer reactivities of1‐Ce⁴⁺were found to be greater than those of Mn^IV(O) intermediates binding redox‐inactive metal ions (1‐Mⁿ⁺). This study reports the first example of a redox‐active Ce⁴⁺ion‐bound Mn^IV‐oxo complex and its spectroscopic characterization and chemical properties. 

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4. On the Importance of the Nonequilibrium Ionization of Si iv and O iv and the Line of Sight in Solar Surges

   https://doi.org/10.3847/1538-4357/aab9b9  

   Nóbrega-Siverio, D.; Moreno-Insertis, F.; Martínez-Sykora, J. (May 2018, The Astrophysical Journal)
5. Intermolecular coupling and fluxional behavior of hydrogen in phase IV

   https://doi.org/10.1073/pnas.1916385116  

   Goncharov, Alexander F.; Chuvashova, Irina; Ji, Cheng; Mao, Ho-kwang (December 2019, Proceedings of the National Academy of Sciences)

   We performed Raman and infrared (IR) spectroscopy measurements of hydrogen at 295 K up to 280 GPa at an IR synchrotron facility of the Shanghai Synchrotron Radiation Facility (SSRF). To reach the highest pressure, hydrogen was loaded into toroidal diamond anvils with 30-μm central culet. The intermolecular coupling has been determined by concomitant measurements of the IR and Raman vibron modes. In phase IV, we find that the intermolecular coupling is much stronger in the graphenelike layer (G layer) of elongated molecules compared to the Br 2 -like layer (B layer) of shortened molecules and it increases with pressure much faster in the G layer compared to the B layer. These heterogeneous lattice dynamical properties are unique features of highly fluxional hydrogen phase IV. 

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