Growth process and compressed phase of DMe-DCNQI on Ag(110) in the monolayer regime observed by LEED, XPS, and STM

Seidel, Christian; Kopf, H.; Fuchs, Harald

doi:10.1103/physrevb.60.14341

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Similar to our previous work, 27 the supramolecular structure of diFc-14 on Cu(110) at submonolayer coverage is an extended phase with its base vector b 1 2% longer than the compressed phase at monolayer coverage. The relatively larger spacing between two columns of stacked molecules makes the intercalated molecules free to some extent to take a more energetically favorable configuration with the environment.…”

Section: Resultssupporting

confidence: 87%

Multilevel Supramolecular Architectures Self-Assembled on Metal Surfaces

et al. 2010

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We report the controllability of the complexity of surface-supported supramolecular assembly on metal surfaces. By introducing mismatch between the molecular packing and the surface atomic periodicity in the systems with comparable strength of intermolecular and molecule-substrate interactions, a homomolecular assembly exhibiting two-dimensional multilevel structures up to quaternary level was observed. In such a multiperiodicity modulated system, neither the intermolecular nor molecule-substrate interactions solely dominate the assembly, resulting in complicated multilevel structures. We further demonstrated that the multilevel assemblies can serve as templates for site-selective adsorption of guest molecules.

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Section: Resultssupporting

confidence: 87%

Multilevel Supramolecular Architectures Self-Assembled on Metal Surfaces

et al. 2010

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“…50 After depositing DCNQI a small new feature appears at ∼398.5 eV, which is similar to the N 1s binding energy measured after depositing DMe−DCNQI on Ag(110) 51 but lower than the one measured for a DMe-DCNQI multilayer on Ag(111), 52 possibly indicating a charge transfer from the substrate to the molecule. 51 Similar results, i.e., a shift to lower binding energy of the N 1s core level when compared to the bulk compound, have been reported for the closely related TCNQ molecule when deposited on copper or silver substrates. 16,53−55 After Fe deposition and annealing, the position of this peak does not change appreciably, indicating that the molecule remains approximately in the same charged state after coordination.…”

Section: ■ Introductionsupporting

confidence: 65%

“…Figure shows the N 1s, Fe 2p, and C 1s core levels (a) of the clean Ag(111) surface, (b) of the surface after depositing a submonolayer amount of DCNQI, (c) of the surface after depositing Fe on this molecular layer, and (d) of the surface after annealing to 380 K. The two peaks appearing at ∼398.5 and 393.0 eV in the N 1s spectra of the clean Ag surface are due to bulk plasmon losses . After depositing DCNQI a small new feature appears at ∼398.5 eV, which is similar to the N 1s binding energy measured after depositing DMe–DCNQI on Ag(110) but lower than the one measured for a DMe-DCNQI multilayer on Ag(111), possibly indicating a charge transfer from the substrate to the molecule . Similar results, i.e., a shift to lower binding energy of the N 1s core level when compared to the bulk compound, have been reported for the closely related TCNQ molecule when deposited on copper or silver substrates. ,− After Fe deposition and annealing, the position of this peak does not change appreciably, indicating that the molecule remains approximately in the same charged state after coordination.…”

Section: Resultsmentioning

confidence: 99%

Thermal Transition from a Disordered, 2D Network to a Regular, 1D, Fe(II)–DCNQI Coordination Network

et al. 2016

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We report the formation of an Fe−DCNQI (DCNQI = dicyano-p-quinodiimine) coordination network on the Ag(111) surface, where the Fe atoms are 4-fold coordinated in a square-planar geometry with the N atoms of the cyano groups. Depending on the formation temperature, the coordination network can be a two-dimensional arrangement of Fe atoms in a hexagonal lattice joined by DCNQI molecules in an apparent random way, or a set of 1D chains bound together by hydrogen bonds, but with the Fe atoms maintaining the same hexagonal lattice. The electronic structure of this network is studied by a combination of photoemission spectroscopy and theoretical calculations based on the density functional theory. In particular, we show that the oxidation state of the Fe atoms in this 1D arrangement is +2, which has been compared with the atomic charges values obtained from first-principles calculations.

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“…19,24 In this schematic of the structural relation, the adsorption sites of the pentacene molecules relative to the substrate Ag atoms are arbitrarily chosen. The favorable positions and orientations of the main axis of the pentacene molecules on the Ag͑110͒ substrate is to be further determined by the following theoretical calculation.…”

Section: Resultsmentioning

confidence: 99%

Structural evolution of pentacene on a Ag(110) surface

Wang

Shi

et al. 2004

Phys. Rev. B

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Structural evolution of pentacene thin films on Ag͑110͒ crystal, during molecular deposition and during a subsequent change of substrate temperature, was investigated in situ by a molecular beam epitaxy low-energy electron diffraction technique. The pentacene molecules exhibit high mobility on the Ag͑110͒ surface at room temperature and the adsorbate shows a structural evolution from disorder in the submonolayer to an ordered structure when it reaches one monolayer. Heating the substrate to 145°C results in no further structural transition. The ordered monolayer structure on Ag͑110͒ has two domains mirrored at the crystal axis of the silver substrate. Molecular mechanics calculations indicate that the pentacene molecules lie flat on the Ag͑110͒ surface, which is in good agreement with the experimental results. The calculation also gives the favorable position; i.e., the orientation of pentacene on the Ag͑110͒.

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Growth process and compressed phase of DMe-DCNQI on Ag(110) in the monolayer regime observed by LEED, XPS, and STM

Cited by 10 publications

References 9 publications

Multilevel Supramolecular Architectures Self-Assembled on Metal Surfaces

Multilevel Supramolecular Architectures Self-Assembled on Metal Surfaces

Thermal Transition from a Disordered, 2D Network to a Regular, 1D, Fe(II)–DCNQI Coordination Network

Structural evolution of pentacene on a Ag(110) surface

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