Conformations of a molecular wire adsorbed on a metal surface

Kuntze, J.; Berndt, Richard; Jiang, Ping; Tang, Hao; Gourdon, André; Joachim, Christian

doi:10.1103/physrevb.65.233405

Cited by 46 publications

(39 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, the bottom row (3) contains schematic drawings of the VL conformations, as inferred from the information above. Panels (a) and (b) report the so-called parallel-legs and crossed-legs conformation, already well known from previous investigations on SL [6,14]. They correspond, respectively, to the case in which the TBP groups on one side of the central board rotate in the same direction and in the same/opposite direction with respect to those on the other side of the board.…”

Section: Data Presentation and Discussionmentioning

confidence: 88%

“…Some additional tilting towards the molecular body is also evident. The independent rotation of TBP groups on the same side of the molecular wire is a direct consequence of the particular design of VL; indeed the larger distance L eliminates the steric hindrance between TBP groups present for SL and RL [6].…”

Section: Data Presentation and Discussionmentioning

confidence: 98%

“…The bar at the upper-left corner indicates its orientation. on Cu surfaces in two different conformations, characterised by parallel or crossed legs [6], and can be easily STM manipulated.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conformations and controlled manipulation of a long molecular wire on Cu(111)

et al. 2005

View full text Add to dashboard Cite

Section: Data Presentation and Discussionmentioning

confidence: 88%

Section: Data Presentation and Discussionmentioning

confidence: 98%

See 1 more Smart Citation

Conformations and controlled manipulation of a long molecular wire on Cu(111)

et al. 2005

View full text Add to dashboard Cite

“…Previously, this approach was used to obtain an electrical insulation of a model molecular wire (12). However, these molecules turned out to be too flexible and thus deformed upon adsorption at metal substrates (13).…”

mentioning

confidence: 99%

Electronic decoupling of a cyclophane from a metal surface

Matino

Schull

Köhler

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Electronic self-decoupling of an organic chromophore from a metal substrate is achieved using a naphtalenediimide cyclophane to spatially separate one chromophore unit of the cyclophane from the substrate. Observations of vibronic excitations in scanning tunneling spectra demonstrate the success of this approach. These excitations contribute a significant part of the tunneling current and give rise to clear structure in scanning tunneling microscope images. We suggest that this approach may be extended to implement molecular functions at metal surfaces.electron transport | functional molecules at surfaces | scanning tunneling microscopy | vibronic states P redictions are difficult, especially about the future. We hope that this truism will be valid for the future of surface science, too. Nevertheless, it appears to be safe to predict that functional molecules at surfaces will be one of the foci of surface science over the next decade. The opportunities in this field are virtually unlimited and range from technological issues such as controlling interface effects in organic devices to adventurous endeavors such as building molecular machines at surfaces. Although these topics are most challenging, the present state of the experimental and theoretical methods of surface science is good reason for optimism that significant scientific progress will be made in this field.This article focuses on the electronic coupling between molecules and a metal substrate. At the interface, charge transfer and hybridization affect the levels of an adsorbed molecule, which may significantly modify its properties. To recover and use the intrinsic molecular properties, which may be taylored over a wide range, a degree of decoupling from the metallic surface may be desirable. Effective molecular decoupling has been achieved using multilayers of molecules (1) or ultrathin insulating layers (2-5). An alternative approach is to chemically modify a molecule using spacer groups in order to lift a particular subunit from the substrate. With this aim, for instance, bulky groups have been used to preserve switching capability of an azobenzene derivative (6-11). Previously, this approach was used to obtain an electrical insulation of a model molecular wire (12). However, these molecules turned out to be too flexible and thus deformed upon adsorption at metal substrates (13).Here we use designed cyclophanes to achieve decoupling of one chromophore from a metal surface. These cyclophanes consist of two rigidly separated parallel π-systems from which only one adsorbs to the surface, whereas the second one is expected to remain separated from the metal. Thus, cyclophanes represent a class of molecules that are particularly interesting for investigating columnar π-stacking and through-space or through-bond electronic conductance (14-16). A naphthalenediimide (NDI) cyclophane (Fig. 1) was chosen as a model compound for the present study. It is demonstrated that this organic molecule, with its height of a few angstroms on a metallic substrate, provide...

show abstract

“…STM studies of the adsorption of molecules belonging to the Lander family 35 on Cu(001), [36][37][38] Cu(111), 39,40 Cu(211), 41 and Cu(110) 16,42-46 surfaces have been previously reported, and a rich variety of structures were observed due to strong molecule-surface interactions, which may induce local surface restructuring. Here, we report on STM imaging as well as STS and CITS studies at RT of individual single Lander (SL) molecules and rows of SL molecules adsorbed on oxygen induced nanopatterns on the Cu(110) surface.…”

Section: Introductionmentioning

confidence: 99%

Scanning Tunneling Microscopy and Spectroscopy Studies of Individual Lander Molecules Anchored on a Copper Oxide Nanotemplate

et al. 2008

Self Cite

View full text Add to dashboard Cite

By means of scanning tunneling microscopy (STM), scanning tunneling spectroscopy (STS), and current image tunneling spectroscopy (CITS), we have studied the electronic properties of individual "Lander" molecules anchored on a nanopatterned Cu(110) surface. To hinder surface diffusion during STM and STS imaging and spectroscopy studies at room temperature, the molecules are immobilized in the troughs of the Cu-O nanotemplate which forms on the Cu(110) surface by exposure to oxygen at high temperature. STS spectra extracted from CITS images reveal no lateral dependency over the molecules, which indicates that the electronic features above the center of the molecules as well as above the four spacer legs are very similar. An electronic gap of ∼2.2 eV was determined from the dI/dV spectra, which is tentatively ascribed to the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap of the Lander molecules.

show abstract

Conformations of a molecular wire adsorbed on a metal surface

Cited by 46 publications

References 16 publications

Conformations and controlled manipulation of a long molecular wire on Cu(111)

Conformations and controlled manipulation of a long molecular wire on Cu(111)

Electronic decoupling of a cyclophane from a metal surface

Scanning Tunneling Microscopy and Spectroscopy Studies of Individual Lander Molecules Anchored on a Copper Oxide Nanotemplate

Contact Info

Product

Resources

About