Microporous organic polymers with ketal linkages: synthesis, characterization, and gas sorption properties

NanoPOP: Solution-Processable Fluorescent Porous Organic Polymer for Highly Sensitive, Selective, and Fast Naked Eye Detection of Mercury

Fluorescence-based detection is one of the most efficient and cost-effective methods for detecting hazardous, aqueous Hg²⁺. We designed a fluorescent porous organic polymer (TPA-POP-TSC), with a "fluorophore" backbone and a thiosemicarbazide "receptor" for Hg²⁺-targeted sensing. Nanometer-sized TPA-POP-TSC spheres (nanoPOP) were synthesized under mini-emulsion conditions and showed excellent solution processability and dispersity in aqueous solution. The nanoPOP sensor exhibits exceptional sensitivity (K_sv = 1.01 × 10⁶ M^-1) and outstanding selectivity for Hg²⁺ over other ions with rapid response and full recyclability. Furthermore, the nanoPOP material can be easily coated onto a paper substrate to afford naked eye-based Hg²⁺-detecting test strips that are convenient, inexpensive, fast, highly sensitive, and reusable. Our design takes advantage of the efficient and selective capture of Hg²⁺ by thiosemicarbazides (binding energy = -29.84 kJ mol^-1), which facilitates electron transfer from fluorophore to bound receptor, quenching the sensor's fluorescence.

Rational design, fabrication and characterization of a thiol-rich 3D-porous hypercrosslink polymer as a new engineered Hg2+ sorbent: enhanced selectivity and uptake

A new synergy between a porous matrix and active sites was developed to form a heterogeneous adsorbent for high efficiency and high selectivity mercury removal in drinking water.

Tetraphenylethylene-based microporous organic polymers: insight into structure geometry, porosity, and CO2/CH4 selectivity

Tetraphenylethylene-based microporous organic polymers with tunable porosities were synthesized and their gas sorption capabilities were investigated.

Hyper-crosslinked cyclodextrin porous polymer: an efficient CO2 capturing material with tunable porosity

Several cyclodextrin (CD)-based hyper-crosslinked porous polymers (HCPPs) were designed and synthesized for selective CO₂ adsorption and storage. A feasible way to tailor the porosity of the materials was also established.

Mannitol-based acetal-linked porous organic polymers for selective capture of carbon dioxide over methane

Synthesis of mannitol-based acetal-linked porous organic polymers with considerable CO₂/CH₄ selectivity is reported.

Novel porous materials based on oligospiroketals (OSK)

New materials with moderately high porosity are accessible by polyacetalization under very mild conditions.

Dynamic nuclear polarization NMR spectroscopy allows high-throughput characterization of microporous organic polymers

Dynamic nuclear polarization (DNP) solid-state NMR was used to obtain natural abundance (13)C and (15)N CP MAS NMR spectra of microporous organic polymers with excellent signal-to-noise ratio, allowing for unprecedented details in the molecular structure to be determined for these complex polymer networks. Sensitivity enhancements larger than 10 were obtained with bis-nitroxide radical at 14.1 T and low temperature (∼105 K). This DNP MAS NMR approach allows efficient, high-throughput characterization of libraries of porous polymers prepared by combinatorial chemistry methods.