The targeted synthesis of a series of novel charged porous aromatic frameworks (PAFs) is reported. The compounds PAF-23, PAF-24, and PAF-25 are built up by a tetrahedral building unit, lithium tetrakis(4-iodophenyl)borate (LTIPB), and different alkyne monomers as linkers by a Sonogashira-Hagihara coupling reaction. They possess excellent adsorption properties to organic molecules owing to their "breathing" dynamic frameworks. As these PAF materials assemble three effective sorption sites, namely the ion bond, phenyl ring, and triple bond together, they exhibit high affinity and capacity for iodine molecules. To the best of our knowledge, these PAF materials give the highest adsorption values among all porous materials (zeolites, metal-organic frameworks, and porous organic frameworks) reported to date.

Here we present a new 3D microporous COF with a uniform pore size (0.64 nm). MCOF-1 exhibits high adsorption selectivity towards C3H8, C2H6 and C2H4 over CH4 owing to the pore size and preferential adsorption.

Novel porous aromatic frameworks, PAF-18-OH and its lithiated derivative PAF-18-OLi, have been successfully synthesized. In particular, PAF-18-OLi displays significant enhancements of H 2 and CO 2 adsorption capacity, especially for the CO 2 uptake (14.4 wt%). More valuably, the stable PAF-18-OLi material exhibits high CO 2 /N 2 selectivity, as high as 129 in the case of CO 2 capture from simulated postcombustion flue gas mixtures (85% N 2 and 15% CO 2 ). Furthermore, the PAF-18-OLi has shown an improved H 2 storage capacity after lithiation.

We report here pyrene-based fluorescent porous aromatic frameworks (PAF-19 and PAF-20), which are constructed by a quadrilateral building unit 1,3,6,8-tetrabromopyrene (TBrPy) with linkers 1,4-diethynylbenzene and 1,3,5-triethynylbenzene via Sonogashira-Hagihara coupling reaction, respectively. TG analysis shows that PAF-19 and PAF-20 are thermally stable up to 350 °C in air condition. Both materials also exhibit high chemical stability and cannot dissolve or decompose in any common organic solvents. N 2 sorption results reveal that the BET surface areas of PAF-19 and PAF-20 are 250 m 2 g-1 and 702 m 2 g-1 , respectively. They also display relatively high sorption abilities for hydrogen and carbon dioxide. H 2 O sorption measurements demonstrate that the skeletons of PAF-19 and PAF-20 are highly hydrophobic. Interestingly, PAF-19 and PAF-20 exhibit excellent sorption abilities to organic chemical pollutants at the saturated vapor pressure and room temperature. PAF-20 can adsorb large amounts of methanol and benzene, with values of 609 mg g-1 and 1038 mg g-1 , respectively. The good performances of PAF-19 and PAF-20 with high sorption selectivity promise their potential application for eliminating environmental pollutants in presence of H 2 O.

The targeted synthesis of a series of novel charged porous aromatic frameworks (PAFs) is reported. The compounds PAF‐23, PAF‐24, and PAF‐25 are built up by a tetrahedral building unit, lithium tetrakis(4‐iodophenyl)borate (LTIPB), and different alkyne monomers as linkers by a Sonogashira–Hagihara coupling reaction. They possess excellent adsorption properties to organic molecules owing to their “breathing” dynamic frameworks. As these PAF materials assemble three effective sorption sites, namely the ion bond, phenyl ring, and triple bond together, they exhibit high affinity and capacity for iodine molecules. To the best of our knowledge, these PAF materials give the highest adsorption values among all porous materials (zeolites, metal–organic frameworks, and porous organic frameworks) reported to date.

We report here the synthesis and carbon dioxide capture of a series of porous aromatic framework (PAF) materials assembled using tri(4-ethynylphenyl)amine and various aryl halides via Sonogashira-Hagihara coupling reactions. These PAF materials show moderate surface areas ranging from 370 m 2 g À1 to 953 m 2 g À1 . The functional groups, such as -COOH, -NH 2 and -OH, are incorporated into the backbone of the PAF materials. The isosteric heats of CO 2 and CO 2 /N 2 selectivities for these PAFs are calculated based on the CO 2 and N 2 adsorption isotherms measured at 273 and 298 K. It is found that the -NH 2 functionalized network shows the highest isosteric heat of CO 2 and CO 2 /N 2 selectivity. In addition, the -COOH functionalized network displays the highest CO 2 uptake in terms of per unit areas (4.37 mmol m À2 , 273 K). The results indicate the incorporation of functional groups is effective for synthesizing CO 2philic PAF networks with enhanced interaction with CO 2 molecules.

Two kinds of functional group are associated together in a hierarchically porous material. Due to a synergistic effect, the product exhibits a high uptake of Pb2+ ions with high selectivity.

A new mixed-phase (anatase/rutile) TiO with mesoporous structures and smaller crystal size (3-5 nm) was successfully synthesized by a facile sol-gel method at a lower calcination temperature (100 °C). Rhodamine B can be completely decomposed in the presence of the as-synthesized nanocomposite after only 60 minutes under visible light. Therefore it is believed to be a promising candidate for wastewater treatment.