1. Crystal Engineering Laboratory, Department of Chemistry, University of Kashmir, Hazratbal, Srinagar 190006, Jammu & Kashmir, India
2. Department of Chemistry, DAV University, Jalandhar 144012, Punjab, India
3. Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, U.K.