S1 Supporting information for Preferential Adsorption of CO2 in an Ultramicroporous MOF with Cavities Lined by Basic Groups and Open-Metal Sites Shyamapada Nandi, † Rahul Maity, † Debanjan Chakraborty, † Hemkalyan Ballav, † and Ramanathan Vaidhyanathan * ,†,‡ † Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Rd., Pashan, Pune, 411008, India ‡ Centre for Energy Science, Indian Institute of Science Education and Research, Dr. Homi Bhabha Rd., Pashan, Pune, 411008, India 1. Materials and Methods: Page S2 Synthesis Single crystal XRD 2. Analytical Characterization: Page S4 PXRD analysis TGA analysis IR analysis 3. Gas Sorption analysis: Page S12 Virial analysis IAST Fitting Isotherm Cycling 4. Computational analysis Page S20