Fig. 4: Investigation of reaction order and transport kinetics across the membrane for various molecules.
From: Covalent organic framework membrane reactor for boosting catalytic performance
a Assessment the impact of reactant concentration on the performance of COF-TpBth/PES. The grey areas on the x-axis indicate the reactant concentrations and vacuum suction applied in relation to the catalytic data obtained above. b Time-dependent variation of product yield in Knoevenagel condensation catalyzed by Bthba at room temperature. The accompanying empirical equation is derived from linear fitting. c Evaluating the influence of water on reaction efficiency across different catalytic systems. d Snapshots illustrating the dynamic behavior of benzaldehyde, ethanol, and water within COF-TpBth nanochannels at specific time points (0, 0.37, and 1.28 ns). The diffusion rates follow the order: H2O > ethanol > benzaldehyde (red, O; white, H; cyan, C; grey, COF-TpBth). Some molecules in the pore channel are depicted as dots for clarity. e Statistical analysis of transmembrane molecule permeation across the COF membrane. (f) A magnified view highlighting a pore channel of the COF membrane reactor filled with a hydrogen-bonded water wire. Hydrogen-bonding interactions among the H2O molecules are observable. These interactions, combined with the hydrophobic environment created by surrounding benzaldehyde molecules, are expected to align the H2O molecules linearly along the pore channels.
