02451nas a2200277   4500008004100000022001400041245014900055210006900204260000900273490000700282520152700289653001201816653001201828653000801840653001701848653001701865100002301882700001801905700001701923700002601940700002501966700002001991700001902011700002102030856012202051       2026                        eng d  a1433-785100aHierarchically porous multivariate COF aerogel with enhanced diffusibility and tailored functionality for highly efficient bromine sequestration0 aHierarchically porous multivariate COF aerogel with enhanced dif  cJUL 0 v653 a<p>
	Elemental bromine, owing to its inherently toxic, corrosive, and volatile nature, poses a great threat to the environment and public health. In this regard, although crystalline covalent organic frameworks (COFs) offer ordered porosity and tunable functionality, their powdered form often leads to aggregation, limited diffusibility, and poor processability. Transforming COFs into ultralight, mechanically robust, and easily processable aerogels overcomes these challenges by introducing hierarchical porosity, reduced density, and rapid mass transport pathways. Herein, we have strategically fabricated a series of multivariate covalent organic frameworks in the form of aerogels with high surface area, hierarchical porosity, and multiple binding sites for efficient sequestration of bromine in both vapor and solution phases. The multivariate aerogel shows a high Br-2 uptake capacity, ultrafast adsorption kinetics, excellent selectivity toward Br-2, and outstanding performance under dynamic flow-through conditions, validating its practical applicability. Additionally, the aerogel can sequestrate bromine from aqueous solutions, reducing the concentration to below the permissible limit set by the WHO (&lt; 10 ppm). This study demonstrates the potential of multivariate COF aerogels and establishes a fundamental strategy for designing task-specific systems through rational building-block modulation, offering a versatile pathway toward targeted environmental remediation and separation applications.</p>
10aAerogel10abromine10aCOF10ahierarchical10amultivariate1 aMajumder, Dipanjan1 aSarkar, Nayan1 aTorris, Arun1 aShirolkar, Mandar, M.1 aChatterjee, Sukalyan1 aMalakar, Avijit1 aGhosh, Dipayan1 aGhosh, Sujit, K.  uhttps://library.ncl.res.in/content/hierarchically-porous-multivariate-cof-aerogel-enhanced-diffusibility-and-tailored