Elucidating the Structure and the Impact of Synthesis Methods on the Flexibility of the Metal‐Organic Framework MIL‐88 A (Fe) During Water Capture

sorption. The very high water vapor sorption capacity is probed by utilizing in situ humidity PXRD and calorimetric cycling studies. At least four different crystallographic phases are identified during the sorption measurements and a structural concept and models are developed that explain the changes in the XRD patterns. From this, it is derived that MIL-88 A (Fe) is an excellent material for a new concept of responsive water harvesting technologies.