Supramolecular structures formed from heterocyclic aromatic molecules

Reiche, J.; Schulz, Burkhard; Knochenhauer, Gerald; Dietzel, Birgit; Freydank, Anke-Christine; Zetzsche, T.; Brehmer, L.

doi:10.1016/s0040-6090(96)09391-1

Cited by 11 publications

(3 citation statements)

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“…The Langmuir−Blodgett (LB) technique and organic molecular beam deposition (OMBD) were applied to prepare ordered organic films with typical thicknesses of about 30−60 nm on silicon substrates. Details of the film preparation and their characterization by X-ray reflectometry and scanning force microscopy (SFM) as well as details of molecular modeling calculations are described elsewhere. − An amphiphically substituted 2,5-diphenyl-1,3,4- oxadiazole (AF51), whose structure is shown in Figure , was used for the film preparation. The substituents in this molecule were inserted in order to guarantee good film formation and stabilization properties for the LB technique …”

Section: Methodsmentioning

confidence: 99%

Near-Edge X-ray Absorption Fine Structure Spectroscopy on Ordered Films of an Amphiphilic Derivate of 2,5-Diphenyl-1,3,4-Oxadiazole

et al. 1999

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The surfaces of ordered films formed from an amphiphilic derivative of 2,5-diphenyl-1,3,4-oxadiazole by the Langmuir−Blodgett (LB) technique and organic molecular beam deposition (OMBD) were investigated by the use of near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. For the assignment of the spectral features of the C, N, and O K-edge absorption spectra, fingerprint spectra of poly(p-phenylene terephthalamide) (Kevlar), poly(ethylene terephthalate), poly(p-phenylene-1,3,4-oxadiazole), and 2,5-di(pentadecyl)-1,3,4-oxadiazole, which contain related chemical moieties, were recorded. Ab initio molecular orbital calculations, performed with explicit treatment of the core hole, are used to support the spectral interpretations. Angle-resolved NEXAFS spectroscopy at the C, N, and O K-edges suggests a preferentially upright orientation of the oxadiazole derivative in the outermost layer of the films. X-ray specular reflectivity data and molecular modeling results suggest a similar interpretation.

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Section: Methodsmentioning

confidence: 99%

Near-Edge X-ray Absorption Fine Structure Spectroscopy on Ordered Films of an Amphiphilic Derivate of 2,5-Diphenyl-1,3,4-Oxadiazole

et al. 1999

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“…2) and near 1670 cm À1 (Figs. [3][4][5], respectively. The continued band shift to lower wavenumbers (i.e.…”

Section: Uniaxial Orientationmentioning

confidence: 99%

“…By variation of chemical structure and by use of different film forming processes the properties of aromatic 1,3,4-oxadiazoles can be tailored to the requirements of various applications. Therefore, the film forming properties of these substances and the structure of highly ordered thin oxadiazole layers are of great interest [5,6]. One possibility to prepare such films as mono-or multimolecular layers on many substrate materials is the well-established Langmuir-Blodgett (LB)-technique.…”

Section: Introductionmentioning

confidence: 99%