Overall, all macroligands possess a moderate wettability with a differentiated hydrophobicity, which increases with elevated crosslinking degrees. In agreement with the above examples, the uptake of Ru per phosphine center (Table ) increases with enhanced crosslinking densities, which may be associated to an improved accessibility of the ligating sites for the metal complex. All four Ru-loaded macroligands have similar productivities and a continuous rate of deactivation in the first catalytic run (Fig. ), indicating that the variation of the crosslinking degree does not affect strongly the catalytically active metal phosphine species. However, the catalytic performance in the consecutive runs differ from each other, which can be illustrated regarding the loss of productivity between the second and third catalytic run. While this loss is 39 % for P-B2-Ru, 23 % for P-B3-Ru and 15 % for P-B4-Ru, the catalytic performance remains identical for P-B6-Ru during the last two runs. The catalytic deactivations are examined by FTIR (Fig. ) and nitrogen physisorption of the recovered catalyst after three recycling runs. Concerning structural degradation, the aliphatic C-H vibration band at 2975 cm -1 of the pristine P-B2, P-B3 and P-B4 diminishes after its catalytic application, which can be attributed to a decline of the intact aliphatic bonding. Moreover, the P=O vibration (1179 cm -1 ) arises for all four catalysts, which can be accounted for their deactivation, as it influences the ligating ability of the phosphine. The nitrogen physisorption measurements (Fig. and Table ) of the catalysts after catalytic recycling reveal the preservation of the porous structure, when high crosslinking degrees were adjusted in the macroligand synthesis. While P-B2-Ru (61 % loss) and P-B3-Ru (73 % loss) lose the majority of their pore volume under catalytic stress, P-B4-Ru (16 % loss) partially degrades, whereas P-B6-Ru remains its porous structure during three catalytic runs. This stabilizing trend of the porous macroligands matches with the observed preservation of the catalytic activity over the last two recycling runs and draws two conclusions. Firstly, the blocking of active sites seems to be one of the origins of catalyst deactivation, but secondly, this degradation pathway can be prevented by adjusting a high rigidity of the framework through an enhanced degree of crosslinking.