Pore-size tuning in double-pillared metal-organic frameworks Containing Cadmium clusters Zu-Jin Lin, Tian-Fu Liu, Bo Xu, Li-Wei Han, Yuan-Biao Huang, and Rong Cao* State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China Contents 1- General experimental methods S2 2- Typical procedures for the preparation of H 8 X ligand S3 3- Synthesis of materials S4-S15 4- Powder X-Ray Diffraction S15-S17 5- Thermogravimetric Analysis (TGA) S17-S20 6- X-ray Crystallography of compounds 1-4 S20 7- Additional figures and Scheme S21-S24 *Author to whom correspondence may be addressed: rcao@fjirsm.ac.cn Supplementary Material (ESI) for CrystEngComm This journal is © The Royal Society of Chemistry 2011