Infinite, Linear, Unbranched Borynide Chains in LiBx—Isoelectronic to Polyyne and Polycumulene

Wörle, Michael; Nesper, Reinhard

doi:10.1002/1521-3757(20000703)112:13<2439::aid-ange2439>3.0.co;2-q

Cited by 23 publications

(4 citation statements)

References 24 publications

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“…The boron chain is electronically similar to an unsaturated chain of carbon atoms, such as polycumulene [33,34]. This unique electronic feature has also been reported in the 1D boron structure of a LiB bulk crystal [20,21]. The boron atom chain can therefore be regarded as a cumulenetype boron that may be referred to as Bumulene [23].…”

Section: Electronic State a Chemical Statementioning

confidence: 55%

“…Due to the multi-center bonding of boron atoms, abundance of polymorphs has been reported experimentally. Configuration of boron atoms on substrate can be a monolayer (borophene) [9][10][11][12][13][14][15][16][17][18], a two-dimension (2D) boride [19], an embedded one-dimension (1D) wire [20][21][22][23][24] or a zero-dimension (0D) cluster [25,26]. These surface boron materials have accordingly shown varieties of electronic states and some of them are expected to lead to discovery of the intriguing phenomena, such as superconductivity [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface

Tsujikawa,

Zhang,

Horio

et al. 2023

e-J. Surf. Sci. Nanotechnol.

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A two-dimensional crystal of the copper boride was grown on the well-known Cu(111) surface by boron deposition. The atomic structure and the electronic state were analyzed by a concerting usage of positron diffraction and photoemission spectroscopy. The surface layer is composed of the B and Cu atomic chains that are alternately arranged. It has been known that the B and Cu phases are completely separated in three-dimensional (3D) materials. The present study intriguingly revealed that a compound is formed in two-dimension (2D) at the surface. In addition, the Cu(111) substrate was found to affect a relative height between the B and Cu chains. The 2D Cu-B compound on Cu(111) likely becomes an ideal B/Cu interface to develop surface science and boron chemistry.

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Section: Electronic State a Chemical Statementioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface

Tsujikawa,

Zhang,

Horio

et al. 2023

e-J. Surf. Sci. Nanotechnol.

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“…The ambient-pressure Li 3 B 14 and LiB 3 phases were experimentally determined to have fractional occupancies of Li sites [52][53][54] and represented well with ordered tP136 and tI16 unit cells in DFT calculations of the binary convex hull 51,55 . The near-stoichiometric LiB y≈0.9 was found to have boron chains incommensurate with the lithium sublattice 56 . Modeled with Li m B n unit cells 12 (e.g., hP15-Li 8 B 7 displayed in Fig.…”

Section: A Stability Of Lib and Liby Compoundsmentioning

confidence: 95%

Ab initio study of Li-Mg-B superconductors

Kafle

R.²,

Mazin³

et al. 2022

Phys. Rev. Materials

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LiB, a predicted layered compound analogous to the MgB2 superconductor, has been recently synthesized via cold compression and quenched to ambient pressure, yet its superconducting properties have not been measured. According to prior isotropic superconductivity calculations, the critical temperature (Tc) was expected to be only 10−15 K. Using the anisotropic Migdal-Eliashberg formalism, we show that the Tc may actually exceed 32 K. Our analysis of the contribution from different electronic states helps explain the detrimental effect of pressure and doping on the compound's superconducting properties. In the search for related superconductors, we screened Li-Mg-B binary and ternary layered materials and found metastable phases with Tc close to or even 10−20% above the record 39 K value in MgB2. Our reexamination of the Li-B binary phase stability reveals a possible route to synthesize the LiB superconductor at lower pressures readily achievable in multianvil cells.

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“…13 All procedures reported to synthesize lithium borides employ bulk boron as precursor (Table 1). [2][3][4]9,10 Due to the lack of reactivity of elemental boron, syntheses require prolonged heating, usually for durations longer than 10 hours. The lithium source is metallic lithium, the volatility of which requires operation in sealed vessels.…”

Section: Introductionmentioning

confidence: 99%

Synthesis in Molten Salts and Characterization of Li₆B₁₈(Li₂O)_x Nanoparticles

et al. 2020

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Lithium borides have been synthesized exclusively through classical solid-state chemistry processes that lead to bulk materials. Indeed, due to the lack of reactivity of the solid boron precursors usually employed and to the high covalent connectivity in such solids, high temperatures and long reaction times are necessary to obtain lithium borides. These conditions result in extensive crystal growth. Here we present the synthesis of nanoparticles of a lithium boride bearing tunnel-like cavities templated by neutral Li2O species, which have been reported to be labile. To reach this goal, a liquid-phase synthesis in inorganic molten salts has been developed. The Li6B18(Li2O)x nanoparticles have been characterized by scanning and transmission electronic microscopy (SEM and TEM), X-ray diffraction (XRD), and Raman spectroscopy. We provide an in-depth structural characterization by using 1 H, 7 Li, and 11 B solidstate nuclear magnetic resonance (NMR) coupled with DFT modeling to provide the first assignment of 7 Li and 11 B solid-state NMR signals in lithium borides. We then assess the nanoparticle morphology oriented along the direction of the cavities. This feature shows similarities with structurally related hexagonal tungsten bronzes and could therefore affect the electrochemical and ion exchange properties.

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Infinite, Linear, Unbranched Borynide Chains in LiBx—Isoelectronic to Polyyne and Polycumulene

Cited by 23 publications

References 24 publications

Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface

Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface

Ab initio study of Li-Mg-B superconductors

Synthesis in Molten Salts and Characterization of Li₆B₁₈(Li₂O)_x Nanoparticles

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Infinite, Linear, Unbranched Borynide Chains in LiBx—Isoelectronic to Polyyne and Polycumulene

Cited by 23 publications

References 24 publications

Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface

Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface

Ab initio study of Li-Mg-B superconductors

Synthesis in Molten Salts and Characterization of Li6B18(Li2O)x Nanoparticles

Contact Info

Product

Resources

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Synthesis in Molten Salts and Characterization of Li₆B₁₈(Li₂O)_x Nanoparticles