Overall metal-ellagate MOFs do not exhibit particularly high thermal stability in air compared to many other MOFs, since ellagic acid, notorious as an antioxidant, easily oxidises. TGA experiments provide further evidence for the hydrophobic characters of SU-104, SU-109 and SU-110. Unlike the other MOFs made from more hydrophilic OSDAs, the TGA curves of SU-104, SU-109 and SU-110 lack a small step around 35-110 °C commonly associated with loss of water from the pores. Interestingly, the PXRD pattern of SU-107 drastically changes upon heating suggesting rather significant framework dynamics between room temperature and 40°C. This indicates that while most of the other MOFs are rather rigid, SU-107 is noticeably dynamic and flexible.