S 1 Supporting Information for Dielectric Properties of Zeolitic Imidazolate Frameworks in the Broadband Infrared Regime

Multifunctional Materials & Composites (MMC) Laboratory, Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom Diamond Light Source, Harwell Campus, Chilton, Oxford OX11 0DE, United Kingdom ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, United Kingdom Department of Chemistry, NIS and INSTM Reference Centre, University of Turin, via Pietro Giuria 7, 10125 Torino, Italy