Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Annette Oehlhof"'
Publikováno v:
Zeitschrift für Naturforschung B. 64:847-850
Guido Kramer, Annette Oehlhof, and Herbert Meier Institute of Organic Chemistry, University of Mainz, Duesbergweg 10 – 14, 55099 Mainz, Germany Reprint requests to Prof. Dr. H. Meier. Fax: +49-(0)6131-3925396. E-mail: hmeier@mail.uni-mainz.de Z. Na
Publikováno v:
Helvetica Chimica Acta. 92:1023-1033
Publikováno v:
Synthesis. 2009:848-852
Stilbenoid dendrimers possessing a methanol or methane core are prepared using Wittig-Horner reactions. The dendritic tris(stilbenyl)carbinols 3a-c are converted into the corresponding methylium salts 3'a-c on treatment with trifluoroacetic or tetraf
Publikováno v:
Helvetica Chimica Acta. 92:281-290
Publikováno v:
Tetrahedron. 64:10754-10760
3,6-Bis(styryl)pyridazines 1a – f with 2–6 alkoxy groups show on irradiation in solution a stereoisomerization which leads to a photostationary state of ( E , E )- and ( E , Z )-isomer. Sensitizing and quenching experiments reveal that the ( E ,
Publikováno v:
Zeitschrift für Naturforschung B. 63:1187-1191
Configurationally highly pure (E,E)-4,4´-bis(styryl)biphenyls 2a - e were obtained by Siegrist reactions of 4,4´-dimethylbiphenyl 3 and alkoxy-substituted benzaldimines (4a - e). DSC measurements have indicated different crystalline modifications o
Publikováno v:
Tetrahedron. 64:6551-6560
(E,E)-3,6-Bis(styryl)pyridazines (3a–t) bearing 2, 4 or 6 alkoxy chains were prepared by applying the Siegrist reaction of 3,6-dimethylpyridazine (13) and the corresponding azomethines 10a–t. The transversal dipole moment of these calamitic compo
Publikováno v:
European Journal of Organic Chemistry. 2008:1568-1574
The fluorescence quantum yields F(n) of oligo[2,5-bis(propyloxy)-1,4-phenylenevinylene]s (1b) reach for the trimer (n = 3) in solution a maximum of 86 %, which is almost twice as high as for the monomer (n = 1) and the octamer or undecamer (n = 8, 11
Publikováno v:
European Journal of Organic Chemistry. 2007:625-631
Three conjugated oligomer series with terminal donor–acceptor substitution were studied: oligo(1,4-phenylenevinylene)s DAOPVs 4a–d (n = 1–4), oligo(1,4-phenyleneethynylene)s DAOPEs 6a–d (n = 1–4) and oligo(2,5-thienyleneethynylene)s DAOTEs
Publikováno v:
European Journal of Organic Chemistry. 2006:405-413
Five oligo(2,5-thienyleneethynylene) series (OTE, n = 1–5), namely the push-pull substituted compounds 1b-5b and 1c-5c, the purely donor substituted compounds 1a-5a and two precursor series with protected and deprotected ethynyl end-groups, respect