/pdf/aryl-aryl-bond-formation-one-century-after-the-discovery-of-1jdyxlkwix.pdf

Aryl-aryl bond formation one century after the discovery of the Ullmann reaction.

About Supramolecular Assemblies of π-Conjugated Systems

https://is.muni.cz/el/1431/podzim2006/C7780/um/Read/2711172/SAM_str_grwth_ProgSurfSci00_151.pdf

Structure and growth of self-assembling monolayers

Perylene bisimide dyes as versatile building blocks for functional supramolecular architectures

This article provides a review about electroluminescence from organic materials and deals in detail with organic light-emitting diodes (OLEDs), light-emitting electro-chemical cells (LECs) and electrogenerated chemilumi-nescence (ECL) reflecting different electrooptical appli-cations of conjugated materials. It is written from an organic chemist's point of view and pays particular attention to the development of organic materials involved in corresponding devices. In recent years a substantial amount of both academic and industrial research has been directed to organic electroluminescence in an effort to improve the processability and tunability of organic materials and the longevity of OLEDs and LECs. On the eve of the commercialization of organic electrolumi-nescence this review provides an overview of lifetimes and efficiencies attained and reflects materials and device concepts developed over the last decade. In this context electrogenerated chemiluminescence is discussed with respect to its importance as a versatile tool to simulate the fundamental electrochemical processes in OLEDs.

The electroluminescence of organic materials

Highly ordered structures and submolecular scanning tunnelling microscopy contrast of PTCDA and DM-PBDCI monolayers on Ag(111) and Ag(110)

Normal incidence x-ray standing wave experiments and density functional theory reveal that 3,4,9,10-perylene-tetracarboxylic-dianhydride chemisorbs on Ag(111) in a nonplanar but vertically distorted configuration. The carboxylic O atoms are $0.18\ifmmode\pm\else\textpm\fi{}0.03\text{ }\AA{}$ closer to the surface than the perylene core. The distortion is related to weak, local bonds between carboxylic O atoms and the Ag surface which are coupled---through charge transfer into the former lowest unoccupied molecular orbital---to the primary, extended chemisorption bond via the perylene skeleton.

Molecular Distortions and Chemical Bonding of a Large π-Conjugated Molecule on a Metal Surface

Large and symmetric organic molecules (>200 amu) can form highly-ordered adsorbate layers and thin films when they are deposited by vacuum sublimation on clean reactive surfaces In such cases covalent bonding often occurs via the molecular π-system leading to a parallel orientation of the adsorbate as shown for oligothiophenes and PTCDA on Ag(1 1 1) A proper choice of the substrate and/or a preadsorbate may also cause an upright orientation with bonding via a reactive group of the molecule (example: NDCA/Ni(1 11)) Most of the used molecules yield long-range ordered monolayers with large, almost defect-free domains The stronger the bonding and the smaller the molecule the more likely is the formation of commensurate superstructures which indicate site-specific adsorption even for such large molecules as PTCDA or EC4T Organic epitaxy is discussed and shown for a particular system, PTCDA on Ag(1 1 1), for which the structure of the monolayer is nearly identical to that of theβ-modification of PTCDA crystals, whereas on other substrates (eg Si(1 1 1), Ge(1 0 0)) a disordered interface and hence no true epitaxy is found

Moritz Sokolowski

Papers

Highly ordered structures and submolecular scanning tunnelling microscopy contrast of PTCDA and DM-PBDCI monolayers on Ag(111) and Ag(110)

Molecular Distortions and Chemical Bonding of a Large π-Conjugated Molecule on a Metal Surface

Substrate-interaction, long-range order, and epitaxy of large organic adsorbates

Vertical bonding distances of PTCDA on Au(1 1 1) and Ag(1 1 1): Relation to the bonding type

Surface “architecture” with large organic molecules: interface order and epitaxy