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Sealing functional ionic liquids in conjugated microporous polymer membrane by solvent-assisted micropore tightening

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Nano Research 2022年第3期15卷 2552-2557页

作者： Mengxi Zhang Anke Yu Xiangyu Wu Pengpeng Shao Xin Huang Dou Ma Xianghao Han Jing Xie Xiao Feng Bo Wang Frontiers Science Center for High Energy Material Advanced Technology Research Institute(Jinan)Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsKey Laboratory of Cluster ScienceMinistry of EducationSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Porous organic polymers hold great promise for molecular sieving membrane *** the inclusion of functional ionic liquid(IL)in the pores offers a facile way to manipulate their separation properties,the IL leaching during the separation process is difficult to ***,we report a strategy to in-situ encapsulate ILs into the micropores of the conjugated microporous polymer membrane via a 6-min electropolymerization and further seal the aperture of the pores to prevent ILs leaching by solvent-assisted micropore tightening(SAMT).Upon screening the binding energy between different ILs and gas molecules,two ILs were selected to be incorporated into the membrane for CO_(2)/CH_(4) and O_(2)/N_(2) gas *** resultant separation performances surpass the 2008 Robeson upper ***,the ILs can be locked in the micropores by a facile high surface tension solvent treatment process to improve their separation stability,as evidenced by a 7-day continuous *** simple and controllable process not only enables efficient and steady separation performance but also provides an effective strategy for confining and sealing functional guest molecules in the porous solids for various applications.

关键词： conjugated microporous polymer organic porous membrane in-situ encapsulation pore sealing membrane separation

conjugated microporous polymers for near-infrared photothermal control of shape change

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Science China Materials 2021年第2期64卷 430-439页

作者： Jialong Wu Yongwei Wu Zepeng He Zihua Li Huahua Huang Yongming Chen Guodong Liang School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yatsen UniversityGuangzhou510275China School of Chemistry Sun Yat-sen UniversityGuangzhou510275China

Herein,a facile and highly efficient synthetic method to prepare organic photothermal materials with high photo-stability and outstanding photothermal performance is *** direct polymerization of commercial aromatic monomers in the presence of anhydrous aluminium chloride and dichloromethane,four kinds of conjugated microporous polymers(CMPs)were *** structural analysis confirmed that the resultant CMPs possessed abundant micropores with an extendedπ-conjugated *** near-infrared(NIR)light irradiation(808 nm,1.0 W cm−2),all the CMPs showed fast heating-up behavior with their maximum temperatures higher than 150℃.Moreover,the efficiency of photothermal conversion(η)of the CMPs was found to increase linearly with the increase in the number of conjugated benzene rings within the ***-TPE from tetraphenylethylene(TPE)and Poly-TP from o-terphenyl(TP)showed highηvalues of over 47%.Poly-TPE was additionally used as a photothermal filler to remotely and spatially control the shape recovery of thermal-sensitive shape memory polymers(SMPs),while its introduction(1 wt%)had little influence on the thermal and mechanical properties of the polymer *** to their excellent NIR photothermal performance as well as a one-step synthetic preparation,these CMPs may be promising photothermal materials for practical applications.

关键词： conjugated microporous polymer photothermal conversion near-infrared actuator

Selective adsorption of metronidazole on conjugated microporous polymers

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Science China Chemistry 2015年第7期58卷 1227-1234页

作者： Chunli Zheng Miaomiao Du Fei Li Yue Qi Jun Yi Department of Environmental Science and Engineering Xi'an Jiaotong University Department of Chemistry School of SciencesXi'an Jiaotong University Henan Research Academy of Environmental Sciences

conjugated microporous polymers(CMPs) have recently received extensive attention in oil/organic solvent-water separation field as a kind of ideal porous absorbents with tunable porosity, large surface areas, and super-hydrophobicity. However, reports on the application of CMPs in adsorption of hydrophilic contaminants from water are very few. In this work, we studied the adsorption of metronidazole(MNZ), a polar antibiotic, by two kinds of CMPs. The adsorption characteristics of MNZ by the CMPs, including adsorption kinetics, mechanism, and isotherm parameters were calculated. The adsorption kinetics of MNZ was well expressed by the pseudo-second-order model, and the adsorption process was found to be mainly controlled by film diffusion. The adsorption isotherm data agreed well with the Langmuir isotherm model, and the values of free energy E indicated that the adsorption nature of MNZ on the CMPs was physisorption. Increasing dispersion degree of the CMPs in MNZ solution resulted in greater adsorption. This work may provide fundamental guidance for the removal of antibiotics by CMPs.

关键词： conjugated microporous polymer metronidazole adsorption hydrophobicity

Polyfunctional conjugated microporous polymers for Applications in Direct C—H Arylation of Unactivated Arenes and Aqueous Adsorption of Aromatic Amines

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Chemical Research in Chinese Universities 2020年第6期36卷 1302-1309页

作者： LUO Kexin SU Qing JU Pengyao LI Xiaodong LIU Ziqian SUN Xiaoman LI Guanghua WU Qiaolin College of Chemistry Jilin UniversityChangchun 130012P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun 130012P.R.China

Salen-porphyrin-based conjugated microporous polymers(CMPs)have been demonstrated to be an attractive material platform for predesigned structures and promising ***,a new salen-porphyrin-based conjugated microporous polymer(SP-CMP-L)was solvothermally prepared by porphyrin-forming condensation reaction of pyrrole and salen-dialdehyde *** SP-CMP-L was characterized by spectroscopy technologies,and also exhibited excellent thermal and chemical *** porosity of SP-CMP-L was examined by N2 adsorption/desorption *** BET specific surface area of the CMP material was calculated to be 290.4 m^2/g with the pore volume of 0.19 cm^3/*** microstructure property of the resulting material was further evaculated by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The SP-CMP-L with salen and porphyrin multidentate coordination sites was proposed to serve as an initiator to promote the cross-coupling between aryl halides with unactivated arenes under base mediated *** transition-metal-free catalytic protocol provided high catalytic activity for direct C-H arylation reaction of unactivated arenes,and thus offered a convenient and efficient alternative for the construction biaryl *** addition,the salen-porphyrin based CMP material possessed remarkable adsorption capability for the removal of organic amines from water.

关键词： conjugated microporous polymer C-H arylation Aqueous adsorption

Supported Recyclable Metal-free Frustrated Lewis Pair Catalyst for Catalytic Hydrogenation of Substituted Pyridines to Piperidines

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Chemical Research in Chinese Universities 2024年第4期40卷 682-689页

作者： MA Shaohua TANG Zhiyong CAS Key Laboratory for Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

The construction of heterogeneous frustrated Lewis pairs(FLPs)catalysts is crucial for realizing highly efficient and recyclable pyridines catalytic *** this work,we prepared a recyclable heterogenous FLPs catalyst CMP-BF with conjugated microporous polymer CMP-ethynyl as the support via self-catalyzed 1,1-carboboration reaction with commercial Lewis acid B(C_(6)F_(5))_(3).The as-synthesized CMP-BF demonstrates superior heterogenous catalytic hydrogenation performance(conversion>99%),and considerable stability(84%conversion after three cycles)in recyclable hydrogenation of 2,*** work provides insights into the fabrication and catalytic application of recyclable heterogenous FLP catalysts.

关键词： Pyridine hydrogenation Frustrated Lewis pair conjugated microporous polymer

Reactivity of Pyrogenic Carbonaceous Matter (PCM) in mediating environmental reactions: Current knowledge and future trends

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Frontiers of Environmental Science & Engineering 2020年第5期14卷 115-125页

作者： Wenqing Xu Mark LSegall Zhao Li Department of Civil and Environmental Engineering Villanova UniversityVillanovaPA 19085USA

Pyrogenic Carbonaceous Matter(PCM;e.g.,black carbon,biochar,and activated carbon)are solid residues from incomplete combustion of fussil fuel or *** are traditionally viewed as inert adsorbents for sequestering contaminants from the aqueous phase or providing surfaces for microbes to *** this account,we reviewed the recently discovered reactivity of PCM in promoting both chemical and microbial synergies that are important in pollutant transformation,biogeochemical processes of redox-active elements,and climate change mitigation with respect to the interaction between biochar and nitrous oxide(N2O).Moreover,we focused on our group's work in the PCM-enhanced abiotic transformation of nitrogenous and halogenated pollutants and conducted in-depth analysis of the reaction *** understand what properties of PCM confer its reactivity,our group pioneered the use of PCM-like polymers,namely conjugated microporous polymers(CMPs),to mimic the performance of *** approach allows for the controlled incorporation of specific surface properties(e.g.,quinones)into the polymer network during the polymer *** a result,the relationship between specific characteristics of PCM and its reactivity in facilitating the decay of a model pollutant was systematically studied in our group's *** findings summarized in this account help us to better understand an overlooked environmental process where PCM synergistically interacts with various environmental reagents such as hydrogen sulfide and ***,the knowledge gained in these studies could inform the design of a new generation of reactive carbonaceous materials with tailored properties that are highly efficient in contaminant removal.

关键词： Pyrogenic carbonaceous matter conjugated microporous polymer Remediation Biochar Hydrolysis Pollutant degradation

microporous polythiophene(MPT)-guest complex derived magnetic metal sulfides/carbon nanocomposites for broadband electromagnetic wave absorption

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Journal of Materials Science & Technology 2022年第5期100卷 206-215页

作者： Yingzhi Jiao Siyao Cheng Fan Wu Jiaoyan Shi Aming Xie Xufei Zhu Wei Dong School of Chemical Engineering Nanjing University of Science&TechnologyNanjing 210094China School of Mechanical Engineering Nanjing University of Science&TechnologyNanjing 210094China

Electrical and magnetic properties are two crucial factors for the designing of broadband electromagnetic wave absorption(EWA)*** this work,we synthesized various magnetic metal sulfides/carbon(M_(x)S_(y)/C)nanocomposites from the precursor complex of metal in microporous polythiophene(MPT),and systematically investigated their EWA properties and *** characterization results indicate that M_(x)S_(y) were determined to be Fe_(7)S_(8)/C,Co_(9)S_(8)/C and Ni_(4)S_(3)/C,*** is observed that M_(x)S_(y)/C nanocomposites exhibit remarkable EWA performances,where the maximal absorption gets to-51.3 dB,and efficient absorption can be realized in 10.32-18 GHz(7.68 GHz),which is superior to most reported magnetic carbonaceous EWA ***,the efficient absorption can be tuned to cover Ku band X band,demonstrating their great potential in practical *** conductance loss,obvious polarization relaxation,and apparent eddy current loss are deemed to make the predominant contributions to the high-performance *** research opens up the exploration of novel nanocomposite coupling dielectric loss and magnetic loss using MPT-metal complex precursor for EWA applications.

关键词： microporous polythiophene Metal sulfide Carbon composite conjugated microporous polymer Electromagnetic wave absorption