Fig. 1. Synthesis and PXRD analyses of TTT–DTDA and TTT–BTDA COFs. (a) Scheme of synthesis of TTT–DTDA and TTT–BTDA following the solvothermal method. (b) Side and top view of the ideal eclipsed (AA) structure of TTT–DTDA. (c and d) Experimental, Pawley-refined and simulated powder X-ray diffraction patterns and a difference plot for TTT–DTDA and TTT–BTDA, respectively. (e) Side and top view of the ideal eclipsed (AA) structure of TTT–BTDA (color: purple, carbon; blue, nitrogen; yellow, sulphur; off-white, hydrogen).