Steric ploy for alternating donor–acceptor co-assembly and cooperative supramolecular polymerization† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c6sc02640k Click here for additional data file.

Materials and Methods: All the reagents were received from Sigma Aldrich Chemical Co. and used without further purification. Solvents were purchased from commercial sources and purified by reported protocol.1 Spectroscopy grade solvents were used for physical studies. 1H NMR and 13C NMR experiments were done on a Bruker DPX-400 MHz and 500 MHz NMR machine and all the data were calibrated against TMS. UV/ Vis absorption experiments were performed in a Perkin-Elmer Lambda 25 spectrometer. Mass spectrometric data were acquired by an electron spray ionization (ESI) technique on a Q-tof-micro quadruple mass spectrometer (Micro mass). FT-IR spectra were recorded in a Perkin Elmer Spectrum 100FT-IR spectrometer. Transmission electron microscopy (TEM) images were captured in a JEOL-2010EX machine operating at an accelerating voltage of 200 kV.