Incorporation of organic chromophores into conjugated micro-/mesoporous polymers (CMPs) provides a promising avenue to develop recyclable heterogeneous photocatalysts by overcoming tedious separation and low reusability of homogeneous organic dye-based photocatalysts....
A pillar [5]arene tetramer was constructed by naphthalene diimide and naphthalene-bridged pillar [5] arene dimers through X-type charge transfer interactions. Furthermore, by adding a ditopic neutral guest, a crosslinked supramolecular polymer was successfully fabricated. These cross-linked polymers were confirmed by concentration-dependent NMR spectroscopy, DOSY NMR, UV, SEM and viscosity measurements.
It is crucial to design efficient adsorbents for uranium from natural seawater with wide adaptability, effectiveness, and environmental safety. Porous organic polymers (POPs) provide superb tunable porosity and stability among developed porous materials. In this work, two new POPs, i.e., HCCP-P5-1 and HCCP-P5-2 were rationally designed and constructed by linked with macrocyclic pillar[5]arene as the monomer and hexachlorophosphate as the core via a macrocycle-to-framework strategy. Both pillar[5]arene-containing POPs exhibited high uranium adsorption capacity compared with previously reported macrocycle-free counterparts. The isothermal adsorption curves and kinetic studies showed that the adsorption of POPs on uranium was consistent with the Langmuir model and the pseudo-second-order kinetic model. Especially, HCCP-P5-1 has reached 537.81 mg/g, which is greater than most POPs that have been reported. Meanwhile, the comparison between both HCCP-P5-1 and HCCP-P5-2 can illustrate that the adsorption capacity and stability could be adjusted by the monomer ratio. This work provides a new idea for the design and construction of uranium adsorbents from macrocycle-derived POPs.
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