Task-specific synthesis of novel indole-based porous organic polymers for carbon dioxide adsorption and iodine uptake

Two novel indole-based porous organic polymers, InPhHCP-7 and InMelPOP, were synthesised using Friedel–Crafts alkylation and acetal reactions respectively. InPhHCP-7 was specifically designed for CO2 adsorption, whereas InMelPOP was developed for the removal of iodine species from aqueous solution. Under a pure dry CO2 atmosphere, the CO2 adsorption capacity of InPhHCP-7 reached 2.28 mmol g−1 at 25°C and 100 kPa, with negligible performance degradation over three adsorption–desorption cycles. Th