Linearly polarized emission from PTCDI-C8 one-dimensional microstructures

Linearly polarized emission has been observed from a crystalline one-dimensional (1D) microstructure fabricated from N,N'-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C-8) molecules via solution phase self-assembly. Rotating microscopy imaging of a 1D microstructure under crossed polarization was performed for the investigation of polarized emission. The anisotropy birefringence was maximum only when the 1D microstructure was aligned 45 degrees to the direction of the polarizer and it was minimum when aligned parallel to the polarizer implying that the transmission axis of the 1D microstructure is perpendicular to its pi-pi stacking direction. A model has been proposed to explain linearly polarized emission from the microstructure. (C) 2012 Elsevier B.V. All rights reserved.