Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154941 - 154941
Published: Aug. 17, 2024
Language: Английский
Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 458, P. 131835 - 131835
Published: June 12, 2023
Language: Английский
Citations
137
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(4), P. 2544 - 2552
Published: Jan. 20, 2023
Fashioning microporous covalent organic frameworks (COFs) into single crystals with ordered macropores allows for an effective reduction of the mass transfer resistance and maximum preservation their intrinsic properties but remains unexplored. Here, we report first synthesis three-dimensional (3D) macroporous imine-linked 3D COFs (COF-300 COF-303) via a template-assisted modulated strategy. In this strategy, crystallized within sacrificial colloidal crystal template, assembled from monodisperse polystyrene microspheres, underwent aniline-modulated amorphous-to-crystalline transformation to form large interconnected macropores. The effects introduced structure on sorption performances COF-300 were further probed by iodine. Our results indicate that iodine adsorption occurred in micropores not Accordingly, capacity COF was governed micropore accessibility. relatively long diffusion path non-macroporous resulted limited accessibility (48.4%) thus low (1.48 g·g-1). introduction can greatly shorten render all fully accessible (3.15 g·g-1) coincides well theoretical one.
Language: Английский
Citations
124
Nature Chemistry, Journal Year: 2023, Volume and Issue: 16(1), P. 114 - 121
Published: Sept. 18, 2023
Language: Английский
Citations
110
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Sept. 4, 2023
Adsorbents widely utilized for environmental remediation, water purification, and gas storage have been usually reported to be either porous or crystalline materials. In this contribution, we report the synthesis of two covalent organic superphane cages, that are as nonporous amorphous superadsorbents aqueous iodine adsorption with record-breaking capability selectivity. static system, cages exhibit uptake capacity up 8.41 g g-1 in I2 solution 9.01 I3- (KI/I2) solution, respectively, even presence a large excess competing anions. dynamic flow-through experiment, can reach 3.59 5.79 g-1, respectively. Moreover, these able remove trace media from ppm level (5.0 ppm) down ppb concentration (as low 11 ppb). Based on binding-induced mechanism, such molecular materials prove superior all existing adsorbents. This study open new avenue development state-of-the-art practical uses conceptionally (NAS).
Language: Английский
Citations
99
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(28), P. 15465 - 15472
Published: July 7, 2023
Developing diverse synthetic routes to prepare various crystalline covalent organic frameworks (COFs) and enrich the family of COFs is very important highly desirable. In this research, we demonstrate that Kröhnke oxidation (originally developed carbonyl compounds) can be employed as an efficient method construct two nitrone-linked (CityU-1 CityU-2) through ingenious design polynitroso-containing precursors well exquisite control polymerization conditions. The formation structure nitrone-based linkage units have been confirmed a mode reaction. as-obtained characterized by Fourier transform infrared X-ray photoelectron spectroscopy, powder diffraction patterns, scanning electron microscopy. Notably, CityU-1 exhibits BET specific surface area 497.9 m2g-1 with I2 capture capacity 3.0 g g-1 at 75 °C. Our research would provide more chances for applications.
Language: Английский
Citations
89
ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(2), P. 1295 - 1302
Published: Jan. 11, 2023
With the rapid development of nuclear industry, effective treatment radioactive iodine has currently become an urgent but challenging task. Herein, two covalent organic frameworks (COFs), TFBT-1 and TFBT-2, were successfully synthesized for adsorption. Structure analysis revealed that they are both nanoporous materials with one-dimensional channels derived from packing related two-dimensional frameworks. Iodine adsorption experiments demonstrated COF exhibit performance adsorption, a maximum amount upto 3.15 g g–1 2.60 TFBT-2. The results experimental analyses Fourier-transform infrared spectroscopy, X-ray photoelectron Raman spectroscopy clearly their high is attributed to strong interactions between adsorbed uniformly located abundant nitrogen sites in pores materials, which pre-introduced acylamides situ-generated Schiff base imine groups. present work by introducing nitrogen-rich into adsorbents can be achieved.
Language: Английский
Citations
80
Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(11), P. 3515 - 3577
Published: Sept. 26, 2024
Language: Английский
Citations
80
Small, Journal Year: 2023, Volume and Issue: 19(34)
Published: May 10, 2023
In order to overcome the limitations of supramolecular organic cages for their incomplete accessibility active sites in solid state and uneasy recyclability liquid solution, herein a nitrogen-rich cage is rationally linked into framework systems four isoreticular covalent frameworks (COFs), that is, Cage-TFB-COF, Cage-NTBA-COF, Cage-TFPB-COF, Cage-TFPT-COF, are successfully synthesized. Structure determination reveals they all high-quality crystalline materials derived from eclipsed packing related two-dimensional frameworks. Since usually have high affinity toward iodine species, adsorption investigations carried out results show them display an enhancement capacities. Especially, Cage-NTBA-COF exhibits capacity 304 wt%, 14-fold higher than sample packed itself. The strong interactions between adsorbed species revealed by spectral analyses. This work demonstrates that, utilizing reticular chemistry strategy extend close-packed porous solids, inherent properties can be greatly exploited targeted applications.
Language: Английский
Citations
71
Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(12), P. 7829 - 7906
Published: June 3, 2024
Covalent network polymers, as materials composed of atoms interconnected by covalent bonds in a continuous network, are known for their thermal and chemical stability. Over the past two decades, these have undergone significant transformations, gaining properties such malleability, environmental responsiveness, recyclability, crystallinity, customizable porosity, enabled development integration dynamic chemistry (DCvC). In this review, we explore innovative realm polymers focusing on recent advances achieved through application DCvC. We start examining history fundamental principles DCvC, detailing its inception core concepts noting key role reversible bond formation. Then reprocessability DCvC is thoroughly discussed, starting from milestones that marked evolution progressing to current trends applications. The influence crystallinity then reviewed, covering diversity, synthesis techniques, functionalities. concluding section, address challenges faced field speculates potential future directions.
Language: Английский
Citations
69
ACS Materials Letters, Journal Year: 2023, Volume and Issue: 5(6), P. 1546 - 1555
Published: April 24, 2023
By linking a nitrogen-rich organic cage with linear connectors, three cage-based isoreticular covalent frameworks, i.e., Cage-IRCOF-1, Cage-IRCOF-2, Cage-IRCOF-3, were successfully designed and synthesized by Schiff-base polycondensation reactions. The structure determination simulations from powder X-ray diffraction measurements indicated that these COFs have high crystallinity derived the packing of covalently linked two-dimensional layer frameworks. As porous materials, iodine capture studies carried out, proving they displayed obvious enhancements in uptake as compared pristine itself. In particular, Cage-IRCOF-1 an adsorption capacity 262 wt %, which is 12 times higher than solid packed Spectral revealed there strong interactions between groups adsorbed species. This work demonstrated discrete cages into reticular crystalline effective adsorbents can be fabricated for targeted applications.
Language: Английский
Citations
64