1. Department of Chemistry and Biochemistry, Liquid Crystal Materials Research Center, University of Colorado, Boulder, CO 80309–0215, USA.
2. Department of Physics, Liquid Crystal Materials Research Center, University of Colorado, Boulder, CO 80309–0390, USA.
3. Laboratório de Química Computacional, Instituto de Química, Universidade de Brasilia, Brasilia DF 70910-900, Brasil.