Supporting information Magnetically recoverable graphene-based nanocomposite material as an efficient catalyst for the synthesis of propargylamines via A 3 coupling reaction Najrul Hussain ab* and Manash R. Das ab a Materials Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat-785006, Assam, India. b Academy of Scientific and Innovative Research, CSIR-NEIST Campus, India *To whom correspondence should be addressed Najrul Hussain Materials Sciences & Technology Division, CSIR−North East Institute of Science and Technology, Jorhat−785006, Assam, India Tel: +91-9864582365 Fax: +91−376−2370011, E Mail: najrul0588@gmail.com Electronic Supplementary Material (ESI) for New Journal of Chemistry. This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2017