@misc{KaafaraniWexStrehmeletal.2002, author = {Kaafarani, Bilal R. and Wex, Brigitte and Strehmel, Bernd and Neckers, Douglas C.}, title = {Structural concept for fluorinated Y-enynes with solvatochromic properties}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13168}, year = {2002}, abstract = {An approach to the development of fluorescent probes to follow polymerizations in situ using fluorinated cross-conjugated enediynes (Y-enynes) is reported. Different substitution patterns in the Y-enynes result in distinct solvatochromic behavior. β,β-Bis(phenylethynyl)pentafluorostyrene 7, which bears no donor substituents and only fluorine at the styrene moiety, shows no solvatochromism. Donor substituted β,β-bis(3,4,5-trimethoxyphenylethynyl) pentafluorostyrene 8 and β,β-bis(4-butyl-2,3,5,6-tetrafluorophenylethynyl)-3,4,5-trimethoxystyrene 9 exhibit solvatochromism upon change of solvent polarity. Y-enyne 8 showed the largest solvatochromic shift (94 nm bathochromic shift) upon changing solvent from cyclohexane to acetonitrile. A smaller solvatochromic response (44 nm bathochromic shift) was observed for 9. Lippert-Mataga treatment of 8 and 9 yields slopes of -10,800 and -6,400 cm -1, respectively. This corresponds to a change in dipole moment of 9.6 and 6.9 D, respectively. The solvatochromic behavior in 8 and 9 supports the formation of an intramolecular charge transfer (ICT) state. The low fluorescence quantum yields are caused by competitive double bond rotation. The fluorescence decay time of 9 decreases in methyltetrahydrofuran from 2.1 ns at 77 K to 0.11 ns at 200 K. Efficient single bond rotation in 9 was frozen at -50 °C in a configuration in which the trimethoxyphenyl ring is perpendicular to the fluorinated rings. 7-9 are photostable compounds. The X-ray structure of 7 shows it is not planar and that its conjugation is distorted. Y-enyne 7 stacks in the solid state showing coulombic, actetylene-arene, and fluorine-π interactions.}, language = {en} } @misc{DoscheMicklerLoehmannsroebenetal.2007, author = {Dosche, Carsten and Mickler, Wulfhard and L{\"o}hmannsr{\"o}ben, Hans-Gerd and Agenet, Nicolas and Vollhardt, K. Peter C.}, title = {Photoinduced electron transfer in [N]phenylenes}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-12463}, year = {2007}, abstract = {First studies of electron transfer in [N]phenylenes were performed in bimolecular quenching reactions of angular [3]- and triangular [4]phenylene with various electron acceptors. The relation between the quenching rate constants kq and the free energy change of the electron transfer (ΔG0CS ) could be described by the Rehm-Weller equation. From the experimental results, a reorganization energy λ of 0.7 eV was derived. Intramolecular electron transfer reactions were studied in an [N]phenylene bichomophore and a corresponding reference compound. Fluorescence lifetime and quantum yield of the bichromophor display a characteristic dependence on the solvent polarity, whereas the corresponding values of the reference compound remain constant. From the results, a nearly isoenergonic ΔG0CS can be determined. As the triplet quantum yield is nearly independent of the polarity, charge recombination leads to the population of the triplet state.}, language = {en} } @misc{LudwigKielmann2000, author = {Ludwig, Joachim and Kielmann, Harald}, title = {Beraten statt Verk{\"u}nden : neue Wege in der gewerkschaftlichen Bildungsarbeit}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13875}, year = {2000}, abstract = {Es gibt aus unserer Sicht eine Reihe von Gr{\"u}nden, sich in der gewerkschaftlichen Bildungsarbeit von der Dominanz des Lehrplans abzuwenden und sich an Stelle dessen dem Lernenden in einer Weise zuzuwenden, die seine Deutungen, seine Handlungsmotive und seine Lerninteressen in den Vordergrund stellt. F{\"u}r den Bildungspraktiker ergeben sich Gr{\"u}nde vor allem aus der wiederholten Erfahrung von Diskrepanzen. Erstens die Diskrepanzen, die zwischen der Definition von Lehrzielen und ihrem Erreichen in der Erwachsenenbildung bestehen. Zweitens die Diskrepanzen, die zwischen dem tats{\"a}chlich erlernten Wissen und seiner Umsetzung und Anwendung in der Praxis sich auftun. (aus dem Inhalt)}, language = {de} } @misc{Fischer2005, author = {Fischer, Christian}, title = {Variation und Korrelation im Mittelniederdeutschen : M{\"o}glichkeiten und Grenzen der Variablenlinguistik}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9975}, year = {2005}, language = {de} } @misc{Weissberg2005, author = {Weissberg, Liliane}, title = {Die Unschuld des Namens und die ungeheure Unordnung der Welt}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10008}, year = {2005}, language = {de} } @misc{WillemynsVanheckeVandenbussche2005, author = {Willemyns, Roland and Vanhecke, Eline and Vandenbussche, Wim}, title = {Politische Loyalit{\"a}t und Sprachwahl : eine Fallstudie aus dem Flandern des fr{\"u}hen 19. Jahrhunderts}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-10014}, year = {2005}, language = {de} } @misc{KindelbergerSchmidt2002, author = {Kindelberger, Kilian and Schmidt, Heiko}, title = {Terror, Glaubenskrieg und Fundamentalismus}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9499}, year = {2002}, language = {de} } @misc{BrabandtLocherPruegl2002, author = {Brabandt, Heike and Locher, Birgit and Pr{\"u}gl, Elisabeth}, title = {Normen, Gender und Politikwandel : internationale Beziehungen aus der Geschlechterperspektive ; eine Einf{\"u}hrung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9517}, year = {2002}, abstract = {This introduction provides an overview of feminist approaches to International Relations. The authors compare the Anglo-American debate with the Germanspeaking discussion in order to reveal similarities and differences. They identify three particular areas of research that characterize the German-speaking feminist debate in International Relations: (1) works evolving out of peace studies; (2) research on globalization and international economic institutions; (3) studies focusing on women's movements together with most current works centering around international norms. They argue that feminist approaches to norms constitute a particularly promising research area which provides new "tools" to account for international, regional or domestic policy-change. Gender-sensitive research on norms also allows to address ethical questions that are vital for feminist understandings of science. Moreover, this new focus on norms enables bridge-building between feminism and the mainstream.}, language = {de} } @misc{Brill2002, author = {Brill, Heinz}, title = {Das Zeitalter der Globalisierung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9528}, year = {2002}, language = {de} } @misc{Mols2002, author = {Mols, Manfred}, title = {Was sind und zu welchem Ende betreiben wir Regionalwissenschaften? : Eine politikwissenschaftliche Perspektive}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9539}, year = {2002}, abstract = {On the occasion of his farewell lecture, Manfred Mols looks back to his academic work of the last four decades, and discusses the essential meaning of area studies. He tries to clarify the important denotation of institutes for regional researchers. Area studies should help us to understand changing processes in international policies and they do. He underlines his critical point of view with the position and treatment of area studies among certain universities in Germany.}, language = {de} }