1. Unite de Dynamique et Structure des Materiaux Moleculaires (UDSMM), Universite du Littoral Cote d'Opale (ULCO), 50 Rue Ferdinand Buisson, 62228 Calais Cedex, France
2. Liquid Crystal Research Lab, Department of Physics, University of Lucknow, Lucknow 226007, India
3. The MacDiarmid Institute, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
4. Department of Chemistry, C U Shah University, Wadhwan, Surendranagar, Gujarat, India
5. Government Vivekanand PG College, Manendragarh, Chhatishgarh, India