More Like this

1. Synthesis, Reactivity, and Metal Complexes of Fluorous Triarylphosphines of the Formula P( p- C ₆ H ₄ (CH ₂ ) ₃ (CF ₂ ) _{n - 1} CF ₃ ) ₃ ( n = 6, 8, 10)

   https://doi.org/10.1021/om010193e  

   Soós, Tibor; Bennett, Byron L.; Rutherford, Drew; Barthel-Rosa, Luis P.; Gladysz, J. A. (July 2001, Organometallics)
2. Crystal structures of [Cu(phen)(H 2 O) 3 ( M F 6 )]·H 2 O ( M = Ti, Zr, Hf) and [Cu(phen)(H 2 O) 2 F] 2 [HfF 6 ]·H 2 O

   https://doi.org/10.1107/S2056989021000645  

   Nisbet, Matthew L.; Poeppelmeier, Kenneth R. (February 2021, Acta Crystallographica Section E Crystallographic Communications)

   null (Ed.)

   The crystal structures of three bridged bimetallic molecular compounds, namely, triaqua-2κ 3 O -μ-fluorido-pentafluorido-1κ 5 F -(1,10-phenanthroline-2κ 2 N , N ′)copper(II)titanium(IV) monohydrate, [Cu(TiF 6 )(phen)(H 2 O) 3 ]·H 2 O (phen is 1,10-phenanthroline, C 12 H 8 N 2 ), (I), triaqua-2κ 3 O -μ-fluorido-pentafluorido-1κ 5 F -(1,10-phenanthroline-2κ 2 N , N ′)copper(II)zirconium(IV) monohydrate, [Cu(ZrF 6 )(phen)(H 2 O) 3 ]·H 2 O, (II), and triaqua-2κ 3 O -μ-fluorido-pentafluorido-1κ 5 F -(1,10-phenanthroline-2κ 2 N , N ′)copper(II)hafnium(IV) monohydrate, [Cu(HfF 6 )(phen)(H 2 O) 3 ]·H 2 O, (III), and one molecular salt, bis[diaquafluorido(1,10-phenanthroline-κ 2 N , N ′)copper(II)] hexafluoridohafnate(IV) dihydrate, [CuF(phen)(H 2 O) 2 ] 2 [HfF 6 ]·2H 2 O, (IV), are reported. The bridged bimetallic compounds adopt Λ-shaped configurations, with the octahedrally coordinated copper(II) center linked to the fluorinated early transition metal via a fluoride linkage. The extended structures of these Λ-shaped compounds are organized through both intra- and intermolecular hydrogen bonds and intermolecular π–π stacking. The salt compound [Cu(phen)(H 2 O) 2 F] 2 [HfF 6 ]·H 2 O displays an isolated square-pyramidal Cu(phen)(H 2 O) 2 F + complex linked to other cationic complexes and isolated HfF 6 2− anions through intermolecular hydrogen-bonding interactions. 

   more » « less
3. Is Ba ₃ In ₂ O ₆ a high-T _c superconductor?

   https://doi.org/10.1088/1361-648X/ad42f3  

   Hensling, F. V. E.; Dahliah, D.; Smeaton, M. A.; Shrestha, B.; Show, V.; Parzyck, C. T.; Hennighausen, C.; Kotsonis, G. N.; Rignanese, G-M; Barone, M. R.; et al (May 2024, Journal of Physics: Condensed Matter)

   Abstract It has been suggested that Ba₃In₂O₆might be a high-T_csuperconductor. Experimental investigation of the properties of Ba₃In₂O₆was long inhibited by its instability in air. Recently epitaxial Ba₃In₂O₆with a protective capping layer was demonstrated, which finally allows its electronic characterization. The optical bandgap of Ba₃In₂O₆is determined to be 2.99 eV in-the (001) plane and 2.83 eV along thec-axis direction by spectroscopic ellipsometry. First-principles calculations were carried out, yielding a result in good agreement with the experimental value. Various dopants were explored to induce (super-)conductivity in this otherwise insulating material. NeitherA- norB-site doping proved successful. The underlying reason is predominately the formation of oxygen interstitials as revealed by scanning transmission electron microscopy and first-principles calculations. Additional efforts to induce superconductivity were investigated, including surface alkali doping, optical pumping, and hydrogen reduction. To probe liquid-ion gating, Ba₃In₂O₆was successfully grown epitaxially on an epitaxial SrRuO₃bottom electrode. So far none of these efforts induced superconductivity in Ba₃In₂O_6,leaving the answer to the initial question of whether Ba₃In₂O₆is a high-T_csuperconductor to be ‘no’ thus far. 

   more » « less
4. Branching Ratio for O + H ₃ ⁺ Forming OH ⁺ + H ₂ and H ₂ O ⁺ + H

   https://doi.org/10.3847/1538-4357/ac41ce  

   Hillenbrand, Pierre-Michel; Ruette, Nathalie de; Urbain, Xavier; Savin, Daniel W. (March 2022, The Astrophysical Journal)

   Abstract The gas-phase reaction of O + H 3 + has two exothermic product channels: OH + + H 2 and H 2 O + + H. In the present study, we analyze experimental data from a merged-beams measurement to derive thermal rate coefficients resolved by product channel for the temperature range from 10 to 1000 K. Published astrochemical models either ignore the second product channel or apply a temperature-independent branching ratio of 70% versus 30% for the formation of OH + + H 2 versus H 2 O + + H, respectively, which originates from a single experimental data point measured at 295 K. Our results are consistent with this data point, but show a branching ratio that varies with temperature reaching 58% versus 42% at 10 K. We provide recommended rate coefficients for the two product channels for two cases, one where the initial fine-structure population of the O( 3 P J ) reactant is in its J = 2 ground state and the other one where it is in thermal equilibrium. 

   more » « less
5. Structure, Magnetism, and Multi-electron Reduction Reactivity of the Inverse Sandwich Reduced Arene La ²⁺ Complex [{[C ₅ H ₃ (SiMe ₃ ) ₂ ] ₂ La} ₂ (μ-η ⁶ :η ⁶ -C ₆ H ₆ )] ^1–

   https://doi.org/10.1021/acs.organomet.8b00523  

   Palumbo, Chad T.; Darago, Lucy E.; Dumas, Megan T.; Ziller, Joseph W.; Long, Jeffrey R.; Evans, William J. (September 2018, Organometallics)