1 Supporting Information [Cu(4-phenylpyridine) 4 (trifluoromethanesulfonate) 2 ], a Werner complex that exhibits high selectivity for o-xylene Adrianna M. Kałuża, Soumya Mukherjee, Shi-Qiang Wang, Daniel J. O’Hearn and Michael J. Zaworotko* *E-mail: xtal@ul.ie Table of Contents 1. Experimental section……………………………………………………2 (a) Synthesis of closed () phase..........................................................................2 (b) Synthesis of phase I...........................................................................................2 (c) Synthesis of phase II.........................................................................................2 2. CO 2 gas sorption………………………………………………………...2 3. Powder X-ray Diffraction (PXRD)………………………………….….4 4. Thermogravimetric Analysis (TGA)……………………………….…..6 5. Vacuum Dynamic Vapour Sorption…………………………………....7 6. Scanning Electron Microscopy (SEM)………………………………....7 7. Single Crystal X-ray Crystallography…………………………………8 (a) SAMM-1-Cu-OTf@OX/PX.............................................................................. 8 (b) SAMM-1-Cu-OTf@OX/MX............................................................................. 9 (c) SAMM-1-Cu-OTf@OX/EB.............................................................................10 8. Crystallographic Tables……………...………………………………...12 9. 1 H NMR studies….……………………………….....................……… 17 (a) Vapour-phase selectivity…………………………………....…….… 17 (b) Liquid-phase selectivity…………………………………....……..… 21 10. Intermolecular interactions…...……………………………….…….. 24 11. Sorbents in Figures 3d-f……………………………….………..…… 26 12. References…………………………………………………………….. 28 Electronic Supplementary Material (ESI) for ChemComm. This journal is © The Royal Society of Chemistry 2020