Molecular Assembly of a 3D-Ordered Multilayer

Altman, Marc; Zenkina, Olena V.; Evmenenko, Guennadi; Dutta, Pulak; Boom, Milko E. van der

doi:10.1021/ja800563h

Cited by 55 publications

(83 citation statements)

References 30 publications

(25 reference statements)

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“…Subtle changes in electronic structure of conjugated oligomers have been previously predicted by DFT calculations. [3b,d, 21, 22] In conclusion, we have demonstrated the ability to tune the band gaps of relatively long (> 10 nm), surface-bound metal-organic oligomers, [7,8,12,23] while preserving the adopted structure and chemical framework. HOMO-LUMO engineering to generate small band-gap materials is an important challenge in building up materials with potential electronic functionality.…”

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confidence: 94%

“…The deposition strategy used had previously resulted in assemblies with roughness values in the range of 0.3-2 nm, with 1-PdCl 2 assemblies being the least rough. [7,8,12,13] The thickness determined from fitting the XRR data is 4.5 nm (Figure 3). Based on the thicknesses of the assembly and template layers (Figure 2) and the length of the oligomers (from DFT calculations, see below), the tilt angle can be approximated as about 208.…”

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confidence: 99%

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Designing Surface‐Confined Coordination Oligomers

Altman¹,

Rachamim²,

Ichiki³

et al. 2010

Chemistry A European J

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confidence: 94%

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confidence: 99%

Designing Surface‐Confined Coordination Oligomers

Altman¹,

Rachamim²,

Ichiki³

et al. 2010

Chemistry A European J

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“…First attempts towards a stepwise self-assembly into the third dimension have been reported recently. [64] …”

Section: Discussionmentioning

confidence: 99%

Surface Science Approaches to Molecular Nanostructures

Treier¹,

Fasel²

2009

Chimia

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The self-assembly of large organic adsorbates on solid surfaces is driven by subtle energy balances between adsorbate-adsorbate and adsorbate-substrate interactions. Understanding these interactions is a key step towards the rational design and large-scale production of ordered, two-dimensional organic nanostructures which may find applications in (opto)electronic devices, sensors and surface catalysts. Due to the reduced dimensionality at surfaces, new phenomena arise which can only be understood by combining both experimental and theoretical methods and knowledge from chemistry and physics. In this short review, we illustrate the richness of surface chemical phenomena at the hand of four case studies which are selected to highlight the potential as well as the current limitations in controlling molecular self-assembly at surfaces.

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“…XRR was employed to probe the thickness, roughness, and density of the multilayer films on quartz. This technique has been used to probe multilayer films composed of other molecular building blocks, [38][39][40][41] in addition to ZnTPEP multilayers assembled via the CuAAC method. 8,9 Briefly, the specular reflectance of X-rays off various interfaces of the thin film and substrate result in interference patterns as the angle of incident changes.…”

Section: Electronic Absorption Analysismentioning

confidence: 99%

Synthesis, Characterization, and Fluorescence Properties of Mixed Molecular Multilayer Films of BODIPY and Zn(II) Tetraphenylporphyrins

Topka

Dinolfo

2015

ACS Appl. Mater. Interfaces

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A new azido functionalized 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) has been synthesized to achieve spectral complementarity to a Zn(II) tetraphenylethynyl porphyrin (ZnTPEP). Mixed multilayer films were assembled on glass and quartz up to 10 bilayers thick in a layer-by-layer (LbL) fabrication process using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) to couple these two dyes together with a tris-azido linker. By varying the amount of BODIPY in the CuAAC reaction solutions for the azido linker layers, we achieve tunable doping of BODIPY within the porphyrin films. We are able to demonstrate linear film growth and determine thickness by X-ray reflectivity (XRR). XRR data indicated that lower BODIPY loading leads to higher porphyrin content and slightly thicker films. Fluorescence emission and excitation spectra of the mixed multilayer films show efficient quenching of the BODIPY singlet and enhanced ZnTPEP emission, suggesting efficient energy transfer (EnT). The ease of fabrication and tunability of these films may serve as potential light harvesting arrays for molecular-based solar cells.

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Molecular Assembly of a 3D-Ordered Multilayer

Abstract: Combining strong metal-ligand coordination and pi-pi interactions affords a 3D-ordered molecular-based multilayer. The organization of the assembly is apparent from the optical properties and X-ray reflectivity.

Cited by 55 publications

References 30 publications

Designing Surface‐Confined Coordination Oligomers

Designing Surface‐Confined Coordination Oligomers

Surface Science Approaches to Molecular Nanostructures

Synthesis, Characterization, and Fluorescence Properties of Mixed Molecular Multilayer Films of BODIPY and Zn(II) Tetraphenylporphyrins

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