Large-scale generation of radioactive iodine (129I, 131I) in nuclear power plants pose a critical threat in the event of fallout, thus rendering the development of iodine sequestering materials (from both the vapor and aqueous medium) highly pivotal. Herein, we report two chemically stable ionic polymers containing multiple binding sites, including phenyl rings, imidazolium cations, and bromide anions, which in synergy promote adsorption of iodine/triiodide anions. In brief, exceptional iodine uptake (from the vapor phase) was observed at nuclear fuel reprocessing conditions. Furthermore, the ionic nature propelled removal of >99% of I3 – from water within 30 min. Additionally, benchmark uptake capacities, as well as unprecedented selectivity, were observed for I3 –anions. The excellent affinity (distribution coefficient, ∼105 mL/g) enabled iodine capture from seawater-spiked samples. Moreover, iodine-loaded compounds showed conductivity (10–4 S/cm, 10–6 S/cm), placing them among the best known conducting porous organic polymers. Lastly, DFT studies unveiled key insights in coherence with the experimental findings.

Fabricating new and efficient materials aimed at containment of water contamination, in particular removing toxic heavy metal based oxo-anions (e. g. CrO 42À , TcO 4 À ) holds paramount importance. In this work, we report two new highly stable imidazolium based ionic porous organic polymers (iPOPs) decorated with multiple interaction sites along with electrostatics driven adsorptive removal of such oxoanions from water. Both the iPOPs (namely, iPOP-3 and iPOP-4) exhibited rapid sieving kinetics and very high saturation uptake capacity for CrO 4 2À anions (170 and 141 mg g À 1 for iPOP-3 and iPOP-4 respectively) and ReO 4 À (515.5 and 350.3 mg g À 1 for iPOP-3 and iPOP-4 respectively), where ReO 4 À anions being the non-radioactive surrogative counterpart of radioactive TcO 4 À ions. Noticeably, both iPOPs showed exceptional selectivity towards CrO 4 2À and ReO 4 À even in presence of several other concurrent anions such as Br À , Cl À , SO 4 2À , NO 3 À etc. The theoretical binding energy calculations via DFT method further confirmed the preferential interaction sites as well as binding energies of both iPOPs towards CrO 4 2À and ReO 4À over all other competing anions which corroborates with the experimental high capacity and selectivity of iPOPs toward such oxo-anions.

The domain of metal-organic frameworks (MOFs) has been the research hotspot to scientific community for last two decades and has witnessed an extraordinary upsurge across various domains in material chemistry....

Aggregation-induced catalyst deactivation during the reaction in supported metal catalysts prevails as one of the pitfalls toward their practical implementation. Herein, a homogeneously dispersed palladiumcoordinated N-heterocyclic carbene (NHC) was strategically integrated inside a microporous hyper-cross-linked polymer via post-synthesis structural modulation. Successful immobilization of spatially isolated Pd (II) units onto the polymer scaffold yielded highly robust heterogeneous catalysts 120-MI@ Pd NHC and 120-EI@Pd NHC, respectively. 120-EI@NHC Pd (4.41 wt % Pd) illustrated a remarkable catalytic potency (yield up to >99%) toward the eco-friendly Suzuki−Miyaura coupling (SMC) reaction at room temperature. The superior catalytic efficiency of 120-EI@Pd NHC is further highlighted from its excellent functionality tolerance over 42 substrates bearing electronic diversity and a turnover frequency value reaching up to 4.97 × 10 3 h −1 at a very low catalyst dosage of 0.04 mol %. Pertaining to heterogenization, the polymer catalyst could be easily reused with intact catalytic efficiency for at least 10 cycles. The catalytic competence of 120-EI@NHC Pd in terms of scope, scalability, and sustainability advocates its proficiency, while processability was achieved by crafting 3D aerogel monoliths. The conceptual feasibility was further investigated by devising a cup-based nano-reactor with gram-scale product isolation over three catalytic cycles.

A pyridine-pyrazole-pyrene-based chemosensor, L has been developed and fully characterized by all possible techniques (ESI-MS, NMR, CHN, IR etc.). It has been found that the probe, L selectively recognizes Cu2+...