TY - JOUR A1 - Goldmann, Daniela A1 - Mahlstedt, S. A1 - Janietz, Dietmar A1 - Busch, P. A1 - Schmidt, C. A1 - Stracke, A. A1 - Wendorff, Joachim Heinz T1 - Mesomorphic donor-acceptor twin molecules with covalently linked sheet-like pentaalkyne and nitrofluorenone subunits Y1 - 1998 ER -