The need for lightweight adsorbents that can operate under ambient conditions is critical for hydrogen storage in fuel cell vehicles. COFs have emerged as a promising candidate for this application, owing to their similar properties to MOFs, while being composed of fewer heavy elements. By incorporating transition metals into COFs and placing them in accessible areas within the pore, their interaction with gaseous components can be optimized. By carefully selecting linkers, researchers can generate COFs that are tailored for hydrogen storage applications. Increasing the number of binding sites per linker not only enhances the number of sites for H 2 physisorption or chemisorption, but also enables overlapping interactions between these sites, resulting in a compounding gas-framework interaction. In this study, the authors The price of linkers (Table ) and chelation transition metal (TM) chlorides (Table ) are tabulated using prices from Sigma-Aldrich. Prices are shown in the default quantity, price per gram, and price per kmol of material. To be specific, the chosen linkers are as follows: methanetetrayltetrakis (benzene-4,1-diyl) tetraboronic acid (1), dipyrazino [2,3-f:2',3'h] quinoxaline-2,3,6,7,10,11-hexaol (2), diquinoxalino [2,3-a:2',3'-c] phenazine-2,3,8,9,14,15hexaol (3), and 5,5',5",5"'-methanetetrayl-tetrakis (pyrimidine-2-carbonitrile) (4). Please note that these prices listed in both tables are for the raw materials sold directly from the manufacturer and ignore whether or not they can be synthesized at a discount using other starting precursors.