Linker functionalised phosphinate metal-organic frameworks: Adsorbents for the removal of emerging pollutants

30 January 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Metal-organic frameworks (MOFs) are attracting increasing attention as adsorbents of contaminants of emerging concern which are difficult to remove by conventional processes. However, common carboxylate-based MOFs suffer from low stability in water environment, which limits their environmental applications. In this study, we use phosphinate-based MOFs with higher hydrolytic stability and we focus on the influence of functional groups covering the pore walls on the adsorption of pharmaceutical pollutants present in water – diclofenac, cephalexin and sulfamethoxazole. We present a synthesis of new structures isoreticular to the phosphinate MOF ICR-7. The presented MOFs contain phenyl rings facing the pore walls modified with dimethylamino groups (ICR-8) and ethyl carboxylate groups (ICR-14). These functionalized MOFs were obtained from two newly synthetized phospinate linkers containing the respective functional groups. Generally, the presence of additional functional groups resulted in higher affinity to the tested pollutants in comparison with ICR-7 or activated carbon, however, it also decreased the sorption capacity.


metal-organic frameworks
phosphinic acid
emerging pollutants

Supplementary materials

Linker functionalized phosphinate MOFs: Adsorbents for the removal of emerging pollutants – Supporting information
Description of synthetic procedures and instrumental methods, mathematical models used for processing the experimental data, supplementary figures and data, chemical analytical data for MOF precursors.


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.