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Continuous and scalable synthesis of a porous organic cage by twin screw extrusion (TSE)Egleston, B.D., Brand, M.C., Greenwell, F., Briggs, M.E., James, S.L., Cooper, A.I., Crawford, Deborah E., Greenaway, R.L. 25 May 2020 (has links)
Yes / The continuous and scalable synthesis of a porous organic cage (CC3), obtained through a 10-component imine polycondensation between triformylbenzene and a vicinal diamine, was achieved using twin screw extrusion (TSE). Compared to both batch and flow syntheses, the use of TSE enabled the large scale synthesis of CC3 using minimal solvent and in short reaction times, with liquid-assisted grinding (LAG) also promoting window-to-window crystal packing to form a 3-D diamondoid pore network in the solid state. A new kinetically trapped [3+5] product was also observed alongside the formation of the targeted [4+6] cage species. Post-synthetic purification by Soxhlet extraction of the as-extruded ‘technical grade’ mixture of CC3 and [3+5] species rendered the material porous. / Engineering and Physical Sciences Research Council (EPSRC) under the Grants EP/R005710/1 (AIC) and EP/R005540/1 (SLJ), and for an EPSRC Summer Vacation Bursary at the University of Liverpool (FG, RLG). We also thank the European Research Council under FP7, RobOT, ERC Grant Agreement No. 321156 (AIC), for financial support. RLG thanks the Royal Society for a University Research Fellowship.
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