Fig. 4: Thermal conductivity ratio of ZIFs with functionalized linkers (mIM, nIM, and dcIM) relative to ZIFs(IM).

Half-filled markers represent cases where linker masses are artificially scaled to match that of the lightest linker (IM), which shows a similar trend to mechanical stability. Solid circles indicate results under original mass conditions. The heaviest linker, dcIM, leads to the greatest reduction in thermal conductivity, whereas mIM, with the smallest mass difference from IM, results in only a modest reduction.