TY - JOUR A1 - Miteva, T. A1 - Kloppenburg, L. A1 - Neher, Dieter A1 - Bunz, Uwe H. F. T1 - Interplay of Thermochromicity and Liquid Crystalline Behavior in Poly(p-phenyleneethynylen)s:p-p-Interactions or Planarization of the Conjugated Backbone? Y1 - 2000 ER -