Multifunctional nitrogen-rich aminal-linked luminescent porous organic polymers for iodine enrichment and selective detection of Fe3+ ions

Fluorescent aminal linked porous organic polymer for reversible iodine capture and sensing

“…8 b). Thus, it can be concluded that the TALPOP can retain up to 80% of its initial iodine capture capacity after five cycles, which is comparable with many other reported POPs 26 , 34 , 39 . This also demonstrates that the TALPOP can be efficiently recycled and repeatedly utilized over many cycles without significant decline in iodine capturing capacity.…”

“…The isotherm showed a steep increase in the nitrogen gas uptake at low relative pressure (P/Po < 0.01), and slower uptake at the 0.01–0.8 P/Po range, indicating the material is mostly microporous with minor mesoporous pore size distribution (PSD) 43 . The BET surface area of 401 m 2 g −1 is comparable to many reported aminal linked porous organic polymers 7 , 33 , 39 . PSD (1.3 nm and 1.96 nm) and pore volume (0.871 cm 3 g −1 at P/Po = 0.99) were determined using the non-local density functional theory (NLDFT) (Fig.…”

“…The correlation coefficient R 2 values for the pseudo-first order and pseudo-second order kinetic were determined to be 0.973 and 0.999 (Table 1, S4), respectively. This suggests that the adsorption kinetics of TALPOP follows the pseudo-second order kinetic model, which indicates a chemisorption-type process 39 . Such conclusion is consistent with the presence of high interaction between the polymer surface and the iodine molecules.…”

“…The equilibrium uptake of iodine by TALPOP was determined to be 3.14 g g −1 . The remarkable iodine uptake is among the highest value reported to date for ALPOPs 4,34,39,44 . We attribute this high uptake to the rich-heteroatom framework, large pore volume, and the large conjugated porous network represented by the anthracene moieties.…”

“…Nevertheless, despite the many reported adsorbent materials for iodine capture and storage, needs still exist for the development of new materials that are economically viable and can be prepared in a large scale with a minimal laborious synthetic protocols. Accordingly and building up on our recent reports on the use of aminal linked porous organic polymers (ALPOPs) in iodine capture and metal sensing 4,39 , we envision to design and prepare multifunctional, low-cost, heteroatom-rich, and luminescent aminal linked porous organic polymer by combining nitrogen-rich triazene building block that compromises an anthracene moiety and a heterocyclic aldehyde linker. Herein, we report on the synthesis of a triazine-anthracene aminal linked porous organic polymer (TALPOP) by reacting 9,10-bis-(4,6-diamino-S-triazin-2-yl)anthracene (DTA), the core of the envisioned POP, and 2-furaldehyde, as the organic linker.…”