1 Complexation, Dimerisation and Solubilisation of Methylene Blue in the Presence of Biamphiphilic Ionic Liquids: A Detailed Spectroscopic and Electrochemical Study Reshu Sanan, Tejwant Singh Kang * and Rakesh Kumar Mahajan* Department of Chemistry, UGC-Centre for Advanced Studies Guru Nanak Dev University, Amritsar-143005 (INDIA) ------------------------------------------------------------------------------------------------------------ *Corresponding author, Fax: +91 183 2258820 E-mail address: rakesh_chem@yahoo.com (R.K.Mahajan), tejwantsinghkang@gmail.com (T.S.Kang) Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics This journal is © The Owner Societies 2014