Electronic supplementary material for paper Postsynthetic inner-surface functionalization of the highly stable zirconium-based metal-organic framework DUT-67 Franziska Drache, a Volodymyr Bon, a Irena Senkovska, a* Claudia Marschelke, b Alla Synytska, b and Stefan Kaskel c a Department of Inorganic Chemistry, Dresden University of Technology, Bergstraße 66, 01062 Dresden, Germany b Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany Table of content Section S1. Physisorption data Section S2. Powder X-ray data Section S3. Thermogravimetric analysis (TGA) and differential thermal analysis (TGA) Section S4. NMR data Section S5. Kinetic of the modulator exchange