1. Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH‐8057 Zurich (Switzerland)
2. Shasun Research Centre, 27 Vandaloor‐Kelambakkam Road, Keelakottaiyur, Chennai‐600048 (India)
3. Department of Chemistry, Annamalai University, Annamalai Nagar, Chidambaram‐600002 (India)