Self-Assembly, Molecular Dynamics, and Kinetics of Structure Formation in Dipole-Functionalized Discotic Liquid Crystals

• DOI: 10.1021/ja7113618
• Publication Date: 2008-03-07T07:00:43Z
• Authors: Mahdy M. Elmahdy; Xi Dou; Mihail Mondeshki; George Floudas; Hans-Jürgen Butt; Hans W. Spiess; Klaus Müllen
• Keywords: Metastability; Discotic liquid crystal

The self-assembly, the molecular dynamics, and kinetics of structure formation are studied in dipole-functionalized hexabenzocoronene (HBC) derivatives. Dipole substitution destabilizes columnar crystalline phase except for dimethoxy- monoethynyl-substituted HBCs that undergo a reversible transformation to phase. disk dynamics by dielectric spectroscopy site-specific NMR techniques provide both time-scale geometry motion. Application pressure results thermodynamic diagram shows increasing stability at elevated pressures. Long-lived metastability was found during between two phases. These suggest new kinetic pathways favor with highest charge carrier mobility.