Low-Energy Photoelectron Imaging Spectroscopy of Lan(benzene) (n = 1 and 2)

Silva, W. Ruchira; Cao, Wenjin; Yang, Dong‐Sheng

doi:10.1021/acs.jpca.7b09750

Cited by 6 publications

(4 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the Pr atom is in +II OS in PrB 7 − , whereas in neutral PrB 7 it is in +III OS 41 . It is conceivable that zero OS lanthanides may exist for late lanthanide LnB 9 − clusters, similar to Ln(C 6 H 6 ) complexes 65 – 67 . Supplementary Table 13 summarizes LnB n − ( n = 7–9) lanthanide borozene complexes with different OS of the lanthanides.…”

Section: Resultsmentioning

confidence: 99%

Monovalent lanthanide(I) in borozene complexes

Chen

et al. 2021

Nat Commun

View full text Add to dashboard Cite

Lanthanide (Ln) elements are generally found in the oxidation state +II or +III, and a few examples of +IV and +V compounds have also been reported. In contrast, monovalent Ln(+I) complexes remain scarce. Here we combine photoelectron spectroscopy and theoretical calculations to study Ln-doped octa-boron clusters (LnB8−, Ln = La, Pr, Tb, Tm, Yb) with the rare +I oxidation state. The global minimum of the LnB8− species changes from Cs to C7v symmetry accompanied by an oxidation-state change from +III to +I from the early to late lanthanides. All the C7v-LnB8− clusters can be viewed as a monovalent Ln(I) coordinated by a η8-B82− doubly aromatic ligand. The B73−, B82−, and B9− series of aromatic boron clusters are analogous to the classical aromatic hydrocarbon molecules, C5H5−, C6H6, and C7H7+, respectively, with similar trends of size and charge state and they are named collectively as “borozenes”. Lanthanides with variable oxidation states and magnetic properties may be formed with different borozenes.

show abstract

Section: Resultsmentioning

confidence: 99%

Monovalent lanthanide(I) in borozene complexes

Chen

et al. 2021

Nat Commun

View full text Add to dashboard Cite

show abstract

“…In the past decades, an appealing class of 1D materials emerged, named multidecker organometallic nanowires (MONWs), such as M n (Bz) m and M n (Cp) m (M = Sc − Cu, Bz = C 6 H 6 , Cp = C 5 H 5 ), which have been demonstrated to have potential applicability in nano electronic and nanomagnetic devices [53][54][55]. A variety of MONWs have been successfully synthesized in experiments.…”

Section: Introductionmentioning

confidence: 99%

Transport Property of Wrinkled Graphene Nanoribbon Tuned by Spin-Polarized Gate Made of Vanadium-Benzene Nanowire

Shang

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

A series of four-terminal V7(Bz)8-WGNR devices were established with wrinkled graphene nanoribbon (WGNR) and vanadium-benzene nanowire (V7(Bz)8). The spin-polarized V7(Bz)8 as the gate channel was placed crossing the plane, the concave (endo-positioned) and the convex (endo-positioned) surface of WGNR with different curvatures via Van der Waals interaction. The density functional theory (DFT) and nonequilibrium Green’s function (NEGF) methods were adopted to calculate the transport properties of these devices at various bias voltages (VS) and gate voltages (VG), such as the conductance, spin-polarized currents, transmission spectra (TS), local density of states (LDOS), and scattering states. The results indicate that the position of V7(Bz)8 and the bending curvature of WGNR play important roles in tuning the transport properties of these four-terminal devices. A spin-polarized transport property is induced for these four-terminal devices by the spin-polarized nature of V7(Bz)8. Particularly, the down-spin channel disturbs strongly on the source-to-drain conductance of WGNR when V7(Bz)8 is endo-positioned crossing the WGNR. Our findings on the novel property of four-terminal V7(Bz)8-WGNR devices provide useful guidelines for achieving flexible graphene-based electronic nanodevices by attaching other similar multidecker metal-arene nanowires.

show abstract

“…More recently, lanthanide atoms in the ground electronic states have been used to activate C–C/C–H bonds of small hydrocarbons, and the activation reactions were characterized by ionization spectroscopy in the gas phase. − The presence of the 4f electrons and stronger spin–orbit coupling makes the lanthanides different from d-block transition metals. , The compactness of the 4f orbitals makes the lanthanide reactions with minimal reliance on ligands and the ability to undergo rapid ligand exchange. , Despite the recent advancement in the hydrocarbon activation by the ground-state lanthanide atoms and the unique feature of these heavy elements, reports on how their excited states would affect C–H/C bond activations are hard to find in the literature. In this work, we report the reactivity comparison of the initial and excited states of La and Ce atoms using 1-butyne (C 4 H 6 ) as a reaction substrate.…”

Section: Introductionmentioning

confidence: 99%

Probing La and Ce Excited-State Reactivity with Resonant Two-Photon Ionization Spectroscopy

2022

Self Cite

View full text Add to dashboard Cite

Dehydrogenation and C−C bond cleavage of 1-butyne by the excited states of La and Ce atoms are investigated in laser-ablation metal molecular beams. The excited states of the metal atoms are prepared by resonant excitation, detected by resonant two-photon ionization spectroscopy, and the reaction products are monitored by photoionization time-of-flight mass spectrometry. The reactivities of La* [5d 2 ( 3 F)6p ( 4 G 5/2 °)] and Ce* [4f5d( 3 F°)6s6p( 3 P°) ( 5 H 5 )]excited states are observed to be higher than those of the initial states of the corresponding metal atoms. The higher reactivities of the excited states are attributed to their higher energies and favorable electron configurations to form two covalent bonds of the metal-insertion intermediates. Although both excited La and Ce atoms show increased reactivities, the enhancement for Ce is much more pronounced than that of La, which cannot be explained by electron configurations alone. The larger reactivity enhancement from the initial states to the excited state of the Ce atom than that of La is due to the longer lifetime of the Ce excited state.

show abstract

Low-Energy Photoelectron Imaging Spectroscopy of La_n(benzene) (n = 1 and 2)

Cited by 6 publications

References 72 publications

Monovalent lanthanide(I) in borozene complexes

Monovalent lanthanide(I) in borozene complexes

Transport Property of Wrinkled Graphene Nanoribbon Tuned by Spin-Polarized Gate Made of Vanadium-Benzene Nanowire

Probing La and Ce Excited-State Reactivity with Resonant Two-Photon Ionization Spectroscopy

Contact Info

Product

Resources

About