Low band-gap benzothiadiazole conjugated microporous polymers
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Low band-gap conjugated microporous polymers (CMPs) based on benzothiadiazole (BTZ) and thiophene-benzothiadiazole-thiophene (TBT) functional groups are prepared. The polymers show moderate surface areas and broad light absorption covering the whole visible light region. Fluorescence of one of the polymers can be readily quenched by the in situ blending of fullerene.Keywords:
Conjugated microporous polymer
Microporous polymers which have high surface areas can be as one of physisorption hydrogen storage materials.The hydrogen storage of microporous polymers such as polymer of intrinsic microporosity(PIMs) and hypercrosslinked polymers(HCPs),which compared with others microporous materials such as carbon,metal-organic frameworks(MOFs) under the condition of 0.1MPa and 77K are reviewed.And effect of factors(surface area,porous size and porous size distribution,binding affinities with H_2) on the hydrogen storage of microporous polymers are discussed.Among these polymers,HCPs is becoming one of the most potential hydrogen storage materials of microporous polymers,as there are more monomers to choose and their porous morphology are easy to control.
Physisorption
Conjugated microporous polymer
Carbon fibers
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Electrochemical oxidative polymerization of rigid, multifunctional monomers allows for the
generation of microporous thin films with high surface areas. In this work, multifunctional
carbazole- and thiophene-based rigid monomers were utilized as tridimensional building
blocks (tectons) toward the electrogeneration of microporous polymer films. The monomer
structure plays an essential role on the properties of the resulting microporous polymer
networks. A distinct correlation is observed between the number of electroactive substituents
in the monomers and the specific surface area of the corresponding microporous polymer
films. Potential applications were explored for the chemical and electrochemical detection of
nitroaromatic compounds using optimized microporous polymer films.
Carbazole
Conjugated microporous polymer
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Conjugated microporous polymer
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Azine
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Triptycene-based microporous polymer was functionalized with thioamide moieties via postpolymerization. Gas adsorption experiments indicate that the modification leads to a reduction in the BET surface area of the polymer, from 1640 m2 g−1 for the parent TMP to 207 m2 g−1; however, the resulting microporous polymer still possesses high H2 uptake capacity, reaching 101.1 cm3 g−1 (0.9 wt %) at 1.0 bar and 77 K, along with relatively high selectivity toward CO2 over CH4 and N2. Additional Supporting Information may be found in the online version of this article. Supplementary Information Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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Thioamide
Conjugated microporous polymer
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The technology of the polymer precise microporous filtration is a high efficient one in solidliquid precise filtration ,which has extensive application prospect in chemical productionsThe main compositions and the features of this technology and its application in catalytic fields are introduced
Filtration (mathematics)
Conjugated microporous polymer
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Electruluminescence (EL) in conjugated polymers based on phenyleneethynylene and thiophene (PPE) with C—C triple bonds in their main chains were studied. It was found that the emitting wavelength will red shift by introduction of thiophene which is an electron rich moiety, the results suggest that electron rich moieties should increase effective conjugation length. Our results also show that the incorporation of thiophene units into PPE may significantly reduce the rigid rod conformation and improve the processibility.
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This chapter talks about the microporous organic framework materials for membrane separations. Microporous organic framework materials refer to hydrocarbons containing pores or voids at the microporous regime. Their backbones are composed of organic moieties connected by strong covalent bonds, usually resulted in ordered and rigid structures. The family members include polymers of intrinsic microporosity, covalent organic frameworks, conjugated microporous polymers, covalent triazine-based frameworks, hypercrosslinked polymers, porous cages, and porous aromatic frameworks. The chapter is intended to report research on newly emerged microporous organic framework membranes with defined porous structures. It covers gas separations of hydrogen, carbon dioxide, air, and other relevant gases, as well as water treatment. In the chemical or environmental industries, nanofiltration (NF) membranes are widely used for applications such as wastewater treatment and recovery of valuable organic molecules. NF membranes have pore sizes from 1 to 10 nm, and they are predominantly created from conventional polymer thin films.
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Abstract Microporous organic polymers offer the possibility of storing hydrogen safely at low temperatures and moderate pressures via physisorption. A range of polymers of intrinsic microporosity (PIMs) have been studied. The best PIM to date is based on a triptycene monomer and takes up 2.7% H 2 by mass at 10 bar/77 K. Hypercrosslinked polymers (HCPs) also show promising performance, particularly at pressures >10 bar. The form of the H 2 isotherm is influenced by the micropore distribution, a higher concentration of ultramicropores (pore size <0.7 nm), as found in PIMs, being associated with enhanced low pressure adsorption. The performance of polymers relative to other microporous materials (carbons and metal‐organic frameworks) is compared and promising methods to enhance the hydrogen uptake of microporous polymers are suggested. magnified image
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In this article, the synthesis and fundamental properties of [2.2]paracyclophane-containing through-space conjugated polymers are described. By incorporating pseudo-para-, pseudo-ortho-, and pseudo-geminal-linked [2.2]paracyclophane skeletons into conjugated polymer main chains, through-space conjugated polymers comprising stacked π-electron systems can be prepared. Our recent works in this filed are especially focused on, and the characteristic features of the through-space conjugated polymers constructed by [2.2]paracyclophane are summarized. Especially, we emphasize the role of [2.2]paracyclophane moiety in the polymer backbone as well as possibility for a single molecular wire that flows energy and charges in one direction via the through-space. In addition, conjugated microporous polymers containing the [2.2]paracyclophane skeletons are also briefly introduced.
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Pd nanoparticles were well dispersed on a new triptycene-based microporous polymer support by the gas bubbling-assisted membrane reduction (GBMR) method. The stability of Pd nanoparticles is improved by the porous support, and the materials show excellent performance for CO oxidation.
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