Synthèse de nouveaux systèmes conjugués de types Donneur-Accepteur basés sur le motif benzodifurane

Date du colloque : 06/2011</p

Towards the development of sustainable π-Conjugated materials: Synthesis of new donor-acceptor systems based on extended benzodifuran derivatives

Date du colloque : 08/2012</p

Extended benzodifuran – thiophene systems connected with azomethine junctions: Synthesis and electronic properties

The synthesis of extended benzodifuran – thiophene systems connected by azomethine junctions are described. The electronic properties of these systems, studied by UV-Vis spectroscopy and cyclic voltammetry, are discussed in relation with the electron withdrawing groups grafted on the benzodifuran unit and the electron donor ability of the thiophene moieties

Synthèse de nouveaux matériaux alternés Donneur-Accepteur conjugués pour l’électronique plastique

Date du colloque : 05/2013</p

Extended benzodifuran-furan derivatives as example of pi-conjugated materials obtained from sustainable approach

The synthesis of extended benzodifuran-furan systems are described as an example of pi-conjugated materials prepared by following a green approach with only water being produced as waste and using furan derivatives from renewable sources. Investigation of their optical and electrochemical properties shows that the new compounds present electronic properties compatible for application in organic electronics. (C) 2012 Elsevier Ltd. All rights reserved

Nouveaux dérivés du thiophène substitués sur les positions 3 et 4 par des groupements donneurs et accepteurs

Date du colloque : 05/2013</p

Rational Topological Design for Fluorescence Enhancement upon Aggregation of Distyrylfuran Derivatives

A series of 2,5-distyrylfuran derivatives bearing pentafluorophenyl- and cyanovinyl units have been synthesized for aggregation-induced emission (AIE). The effect of the type and extent of the supramolecular connections on the AIE of the furan derivatives were examined and correlated with their X-ray crystal structures. It was found that the simultaneous presence of cyano and perfluorophenyl units strongly enhances the fluorescence upon aggregation. Single-crystal X-ray diffraction analysis confirmed that C — H⋅⋅⋅F, F⋅⋅⋅F, C — H⋅⋅⋅nitrile, Ar⋅⋅⋅ArF (Ar=aryl, ArF=fluoroaryl), and nitrile⋅⋅⋅ArF intra- and intermolecular interactions drive the topology of the molecule and that solid-state supramolecular contacts favor AIE of the furan derivatives

Homicide and Associated Steroid Acute Psychosis: A Case Report

We report the case of an old man treated with methylprednisolone for chronic lymphoid leukemia. After two months of treatment, he declared an acute steroid psychosis and beat his wife to death. Steroids were stopped and the psychotic symptoms subsided, but his condition declined very quickly. The clinical course was complicated by a major depressive disorder with suicidal ideas, due to the steroid stoppage, the leukemia progressed, and by a sudden onset of a fatal pulmonary embolism. This clinical case highlights the importance of early detection of steroid psychosis and proposes, should treatment not be stopped, a strategy of dose reduction combined with a mood stabilizer or antipsychotic treatment. In addition have been revised the risks of the adverse psychiatric effects of steroids

Syntheses and NMR and XRD studies ofcarbohydrate–ferrocene conjugates

Carbohydrate–ferrocene conjugates were synthesized and showed that the ferrocene entity appeared to be confined to a low volume so that proton NMR spectroscopy revealed 3 to 4 signals for substituted cyclopentadienyl instead of two usually