A new open-chain ether-linked polymer has been prepared via nucleophilic aromatic substitution reaction on a C-F bond of 1,4-dibromo-2,5-difluorobenzene by using 2,2-bis(4-hydroxyphenyl) hexafluoropropane (bisphenol AF or BAF). The (PE-AF) shown good solubility in non-polar solvents, thermal stability (up to 300 °C) and random surface morphology. Tailoring these properties achieved utilizing th...

This article questions· ~hether it is useful to think of problem behavior as caused, and whether causal information about problem behavior is a necessary prerequisite to changing it. Psychoanalytic, behavioral, systemic, and solutionRfocused approaches to the issue are discussed briefly. Taking the perspective that the cause or causes of a particular client's problem behavior cmmot be known, it...

Various methoxy- and hydroxy-substituted dibenz[c,e]oxepines were prepared via the copper(I)-induced coupling of ether-tethered arylstannanes or the dehydrative cyclisation of 1,1'-biphenyl-2,2'-dimethanols, assembled using the Ullmann cross-coupling of ortho-bromoaryl carbonyl compounds. The dibenzoxepines were screened for their ability to inhibit tubulin polymerisation and the in vitro growt...

Palladium nanoparticles supported on cellulose were prepared without using any reducing agent and used as a highly efficient catalyst for the Ullmann reductive coupling of aryl halides in the presence of zinc, in a water-alcohol mixture as solvent in air. The obtained palladium nanoparticles were characterized by scanning electron microscopy (SEM), FTIR, thermogravimetric analysis (TGA) and ICP...

612 JEADV 2006, 18, 602–634 © 2006 European Academy of Dermatology and Venereology in the diagnosis of invasive pulmonary aspergillosis. Am J Med 1996; 100: 171–178. 6 Verweij PE, Meis JFGM. Microbiological diagnosis of invasive fungal infection in transplant recipients. Transpl Infect Dis 2000; 2: 80–87. 7 Mennink-Kersten MA, Donnelly JP, Verweij PE. Detection of circulating galactomannan for ...

Essentially complete atropdiastereoselectivity was realized in the preparation of biaryl diphosphine dioxide by asymmetric intramolecular Ullmann coupling and oxidative coupling with central-to-axial chirality transfer. A bridged C(2)-symmetric biphenyl phosphine ligand possessing additional chiral centers on the linking unit of the biphenyl groups was synthesized. No resolution step was requir...

The fabrication of nanostructures in a bottom-up approach from specific molecular precursors offers the opportunity to create tailored materials for applications in nanoelectronics. However, the formation of defect-free two-dimensional (2D) covalent networks remains a challenge, which makes it difficult to unveil their electronic structure. Here we report on the hierarchical on-surface synthesi...