These results are summarized in Figure and reported in Ref. [42]. [42]. Strong band dispersion observed for the PA-Zn-SURMOF in the stacking direction, due to enhanced London interactions between the PP linkers. Pictures of structures made with VESTA. To what degree is the spatial extension of the aromatic system of the individual porphyrinic linkers relevant to the properties, which are mainly caused by the proximity effect in the linker stack? To answer this question, we analyzed the band dispersion as function of the rotation angle between the PP moiety and the PA substituent (see Figure ). This is achieved by rotating parts of the linker (PA and the benzene rings connected to the paddle wheel). Indeed, such a rotation results in a strong manipulation of the electronic bands, from almost flat conduction band in a hypothetical structure with all likers at 0 with respect to the PP to very strong be tuned by introducing so-called steric control units (SCU; see Figure ). As demonstrated in recent work, when restricting the size of these units to values smaller than the MOF pore size, the packing of aromatic moieties within the MOF linkers can be varied without changing overall lattice parameters of the MOF material. In particular, by first creating libraries in-silico using appropriate computational workflows (as described in ), the structures of interest can be identified by computational screening of large libraries, before linkers equipped with the "best" SCU are synthesized and used to assemble the corresponding MOFs or SURMOFs.