ELECTRONIC SUPPLEMENTARY INFORMATION (ESI) Novel dansyl-appended calix[4]arene frameworks: fluorescence properties and mercury sensing Shubha Pandey, a,b Amir Azam, *a Siddharth Pandey *b and H. M. Chawla, *b a Department of Chemistry, Jamia Millia Islamia, New Delhi – 110028, India. b Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi – 110016, India. * To whom the correspondence should be addressed. E-mail: sipandey@chemistry.iitd.ac.in (SP); Tel: +91-11-26596503