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Synthesis of stimuli-responsive pillararene-based supramolecular polymer materials for the detection and separation of metal ions

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Chinese Chemical Letters 2023年第5期34卷 268-273页

作者： yongfu Li Xinyue Lou Chunyu wang Yan wang Yu Jia Qi Lin Yingwei Yang International Joint Research laboratory of Nano-Micro Architecture chemistry College of ChemistryJilin UniversityChangchun 130012China state key laboratory of Supramolecular Structure and materials Institute of Theoretical ChemistryLaboratory of Theoretical and Computational ChemistryCollege of ChemistryJilin UniversityChangchun 130012China key laboratory of Eco-functional polymer materials of the Ministry of Education Key Laboratory of Eco-Environmental Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China

A stimuli-responsive supramolecular polymer network(G-(CN)_(2)⊂BXDSP5)with aggregation-induced emission(AIE)properties has been efficiently constructed by host-guest interactions between pillar[5]arene derivative BXDSP5 and a homoditopic guest G-(CN)_(2),which shows not only excellent fluorescence properties due to the AIE effect but also desirable ion-sensing abilities in both solution and solid states,holding great potential in the applicable fluorescence detection for Fe^(3+).The resultant G-(CN)_(2)⊂BXDSP5 can be transformed into supramolecular polymer gel at high concentration via multiple noncovalent interactions,showing multi-stimuli-responsiveness in response to temperature change,mechanical force,and competitive ***,the xerogel of supramolecular polymer material has been successfully used to remove Fe^(3+)from water with high adsorption *** addition,an ionresponsive film based on supramolecular polymer has also been developed,which can serve as a practical and convenient fluorescence test kit for detecting Fe^(3+).

关键词： Aggregation-induced emission Host-guest chemistry Sensing and separation Stimuli-responsive materials Supramolecular polymer materials

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Controlled Cross-linking Strategy for Formation of Hydrogels,Microgels and Nanogels

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Chinese Journal of polymer Science 2018年第1期36卷 8-17页

作者： Qing-Chen Cao Xing wang De-Cheng Wu Beijing National laboratory for Molecular Sciences State Key Laboratory of Polymer Physics&ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China university of Chinese Academy of Sciences Beijing 100049China

Hydrogels are a kind of unique cross-linking polymeric materials with three-dimensional networks. Various efforts have been devoted to manipulate the formation of functional hydrogels in situ and enrich the production of hydrogels, microgels and nanogels with improved modulation capacity. However, these methods always fail to tune the gel properties because of the difficulty in achieving the precise control of cross-linking extents once the gel formation is initiated. Therefore, the preparation of tailor-made hydrogels remains a great challenge. Herein, we summarize a controlled cross-linking strategy towards not only fabrication of hydrogels at nano-, micro-and macro-scales, but also achievement of controlled assembly of nanoparticles into multifunctional materials in macroscopic and microscopic scales. The strategy is conducted by controllably activating and terminating the disulfide reshuffling reactions of disulfide-linked core/shell materials with selective core/shell separation using system p H or UV triggers. So it provides a facile approach to producing hydrogels, hydrogel particles and nanoparticle aggregates with tunable structures and properties, opening up the design possibility, flexibility and complexity of hydrogels, microgels/nanogels and nanoparticle aggregates from nanoscopic components to macroscopic objects.

关键词： Thiol-disulfide exchange Controlled cross-linking Hybrid hydrogels Hydrogel particles Biodegradation

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One-step Condensation/copolymerization of VTES and DVB for Self-assembly Bionic Superhydrophobic Surface Coating and Study on Oil-water separation

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Journal of Bionic Engineering 2021年第3期18卷 559-573页

作者： Ruilong Zhang Zhiping Zhou Yi wang Xiaohui Dai Li Chen Jiangdong Dai Research School of polymeric materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 2120133China state key laboratory of NBC Protection for Civilian Beijing 102205China institute of Green chemistry and Chemical Technology Advanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu ProvinceSchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China

Mimicry of nature drives the development of bionic *** superhydrophobic materials are a kind of high-efficiency materials to handle oil spills and water ***,the stability of surface coatings of the superhydrophobic materials remains a ***,a new category of self-assembly bionic superhydrophobic surface coating was prepared via one-step condensation/copolymerization of vinyltriethoxysilane(VTES)and divinylbenzene(DVB),which realized the close combination of covalent bonds between organic(***)and inorganic matter(***),and avoided the swelling of polydivinylbenzene(PDVB)in the process of collection of oil from *** organic-inorganic hybrid polymer could self-assembly deposit on the surface of sponge even other *** example,P(VTES-DVB)-Si0_(2)/MS obtained by assembling P(VTES-DVB)-Si0_(2)on the surface of Melamine Sponge(MS)exhibited superhydrophobicity with a Water Contact Angle(WCA)of 157.3,the optimal adsorption capacity of 77 g g 136 g g-1 for diverse oils,and an excellent separation efficiency of 99.3%.Besides,the excellent acid and alkali resistance of P(VTES-DVB)-Si0_(2)/MS suggested the potential value in practical oil-water separation.P(VTES-DVB)-Si0_(2)showed the outstanding hydrophobic performance by using as coating on different *** work provided a new idea about the stable combination of organic and inorganic matter in the surface modification.

关键词： superhydrophobic surface coating oil-water separation condensation copolymerization self-assembly organic-inorganic hybridism

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Chiroptical Generation,Switching,and Long-Term Memory in Supramolecular Azobenzene-Pendant polymer: Regulation by Cellulose Peralkyl Esters,D-/L-Glucose Permethyl Esters,Solvents,UV Light Irradiation,and Thermal Annealing Process

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Chinese Journal of chemistry 2023年第24期41卷 3625-3632页

作者： Shiyuan Yi Laibing wang Xiaoxiao Cheng Michiya Fujiki Wei Zhang state and Local Joint Engineering laboratory for Novel functional polymeric materials Jiangsu Engineering Laboratory of Novel Functional Polymeric MaterialsSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu215123 China Graduate School of Science and Technology Nara Institute of Science and Technology8916-5 TakayamaIkomaNara630-0192 Japan School of Chemical and Environmental Engineering Anhui Polytechnic UniversityWuhuAnhui241000 China

Various optically active polymers are known to afford sophisticated chirality-related functionalities,i.e.,asymmetric catalysis,chiroptical switching and memory in UV-vis-NIR region,chromatographic separation of enantiomers,and sensors for molecular ***,material researchers have paid much attention to the design of chiral supramolecular architectures from achiral polymers upon intermolecular interactions with help of greener *** present article reports an instantaneous generation of ambidextrous supramolecules revealing light-driven chiroptical switching/memory in UV-vis region when achiral azobenzene-containing vinylpolymers are non-covalently interacted with alkyl ester derivatives of natural cellulose and D-/*** was recognized that the semi-synthetic biomaterials efficiently work as chirality-inducing scaffoldings to several achiral and optically inactive molecules,oligomers,and *** successful results shed light on a new approach of how inexpensive poly-/mono-saccharide derivatives can afford supramolecular chiroptical systems with the azobenzene pendant polymer as aggregates in suspension and liquid-crystalline films with minimal energy,time,and cost.

关键词： Aggregation Azobenzene Nanostructures functional polymers Supramolecular chirality

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Cocatalysts in photocatalytic methane conversion: recent achievements and prospects

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中国科学:化学英文版 2023年第9期66卷 2532-2557页

作者： Chengcheng Zhang Jing wang Shenshen Ouyang Hui Song Jinhua Ye Li Shi School of materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang key laboratory of Bio-based polymeric materials Technology and Application Ningbo Key Laboratory of Polymer MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China International Center for materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)Tsukuba 305-0044Japan TJU-NIMS International Collaboration laboratory School of Material Science and EngineeringTianjin UniversityTianjin 300072China

Photocatalysis, which performed under mild conditions by utilizing solar energy, has become a desirable technology to convert methane into highly valuable chemicals, such as methanol, ethane, and other hydrocarbons. However, pristine photocatalysts still suffer from the low utilization efficiency of solar light and the high recombination rate of photogenerated charge carriers, which exhibit the low activity and selectivity for photocatalytic methane conversion. Loading cocatalysts on photocatalysts is an attractive strategy to manipulate the products' yield and selectivity of photocatalytic methane conversion due to the enhanced charge carrier separation efficiency, extended light absorption and promoted reactant adsorption/desorption kinetics. This review discusses the recent achievements of the cocatalysts for photocatalytic methane conversion reactions. Moreover, the challenges and perspectives for the development of efficient cocatalysts are presented. This review provides considerable guidelines for the design and construction of efficient cocatalysts for photocatalytic methane conversion reactions.

关键词： photocatalysis methane conversion cocatalysts valuable chemicals

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Towards larger spatiotemporal scales in polymer simulations

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Chinese Science Bulletin 2013年第30期58卷 3595-3599页

作者： LI YanChun wang yongLei LI ZhanWei LIU Hong Lü ZhongYuan state key laboratory of Theoretical and Computational chemistry Institute of Theoretical ChemistryJilin University state key laboratory of polymer Physics and chemistry Institute of Applied ChemistryChinese Academy of Sciences

Molecular dynamics simulations are useful tools to unveil molecular mechanisms of polymer phase separation,self-assembly,adsorption,and so *** to large molecular size and slow relaxation of the polymer chains,a great amount of issues related to large-distance chain displacement cannot be tackled easily with conventional molecular dynamic *** coarse-graining and enhanced sampling methods are two types of improvements that can boost spatiotemporal scales in polymer *** present two typical ways to obtain the coarse-graining potential either by fitting to correct liquid structures or by fitting to available thermodynamic properties of polymer *** newly proposed anisotropic coarse-grained particle model can be used to describe aggregation and assembly of polymeric building blocks from disk-like micelles to Janus *** also present a stochastic polymerization model combined with coarse-grained simulations to investigate the problems strongly influenced by the coupling of polymerization and excluded volume ***,a facile implementation of integrated tempering sampling method is illustrated to be very efficient on bypassing local energy minima and having access to true equilibrium polymer structures.

关键词：聚合物链模拟方法时空尺度分子动力学模拟粒子模型热力学性质聚合物体系聚合物结构

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A microporous aluminum-based metal-organic framework for high methane,hydrogen,and carbon dioxide storage

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Nano Research 2021年第2期14卷 507-511页

作者： Bin wang Xin Zhang Hongliang Huang Zhangjing Zhang Taner Yildirim Wei Zhou Shengchang Xiang Banglin Chen Fujian Provincial key laboratory of polymer materialsy College of chemistry and materials Science Fujian Normal University32 Shangsan RoadFuzhou 350007China Department of chemistry University of Texas at San AntonioOne UTSA Circlet San AntonioTexas 78249-0698USA Center for Neutron Research National Institute of Standards and TechnologyGaithersburgMaryland 20899-6102USA state key laboratory of separation Membranes and Membrane Processes Tianjin Polytechnic UniversityTianjin 300387China

We report a microporous aluminum-based metal-organic framework(MOF),BUT-22 for high methane(CH_(4)),hydrogen(H_(2)),and carbon dioxide(CO2)*** 296 K and 80 bar,BUT-22 exhibits a high gravimetric CH4 storage capacity of 530 cm^(3)(STP)/g(0.379 g/g).BUT-22 also has a high gravimetric H_(2)storage capacity of 12 wt.%at 100 bar and 77 *** addition,the CO_(2)adsorption studies revealed that BUT-22 exhibits a high absolute gravimetric CO2 uptake of 1.7 g/g at 296 K and 40 bar.

关键词： metal-organic frameworks(MOFs) gas storage methane hydrogen carbon dioxide

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Rational design of a cationic polymer network towards record high uptake of ^(99)TcO_(4)^(-)in nuclear waste

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Science china chemistry 2021年第7期64卷 1251-1260页

作者： Jie Li Long Chen Nannan Shen Rongzhen Xie Matthew VSheridan Xijian Chen Daopeng Sheng Duo Zhang Zhifang Chai Shuao wang state key laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China institute of Nuclear Science and Technology Sichuan UniversityChengdu 610064China

^(99)Tc is a long-lived radionuclide present in large amounts as TcO_(4)^(-)-anion in used nuclear *** removal from the waste stream is highly desirable because of its interference capability with actinide separation and its volatile nature during the nuclear waste vitrification *** the progress achieved in the past few years,the design of anion-exchange materials with optimized Tc uptake property and improved stability under the extreme condition is still a research goal beneficial for reducing the volume of secondary radioactive solid waste generated during the waste partitioning ***,their design philosophy remains elusive,with challenges coming from charge repulsion,steric hindrance,and insufficient reactive sites within the ***,we present a design philosophy of cationic polymer network materials for TcO_(4)^(-)separation by systematic precursor screening and structure *** affords an optimized material,SCU-CPN-2(SCU=Soochow university),with extremely high positive charge density while maintaining high radiation ***-CPN-2 exhibits a record high adsorption capacity1,467 mg/g towards the surrogate ReO_(4)^(-)compared to all anion-exchange materials reported up to *** addition to ultrafast adsorption kinetics,SCU-CPN-2 has remarkable selectivity over nitrate and sulfate,and facile recyclability.

关键词： pertechnetate perrhenate adsorption adsorption capacity cationic organic polymer

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FLUORESCENCE STUDIES ON MORPHOLOGICAL CHANGE OF ST/DVB CROSSLINKED GELS DURING CHLOROMETHYLATION

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Chinese Journal of Reactive polymers 2002年第2期11卷 185-191页

作者： ZHANG Jixiang LI Hexian wang Guochang wang Lin wang Ying HE Binglin state key laboratory of functional polymer materials For adsorption and separation and institute of polymer chemistry Nankai UniversityTianjin 300071China

The morphological change of St/DVB crosslinked gels during chloromethylation wasstudied by fluorescence spectroscopy using St/DVB crosslinked and hypercrosslinked gels as controlsamples. It has been found that with increase of chlorine content, the excimer emission band (~325nm)approaches to vanish, while the intensity of multi-ring aggregate emission band (~420nm) quicklyreaches a maximum, and then decreases sharply accompanied by appearance ofa new broad bandcentred at ca 488nm which roughly coincides with the typical emission band of hypercrossllinkedSt/DVB gels. Mearwhile, the result of IR measurement suggests that methylene bridge between phenylrings forms and increases with chloromethylation process. These results are explained in terms ofaside reaction of post-crosslinking, which densifies the loosely crosslinked networks and undoes thedensely entangled microgel nuclei. As a result, the morphology of the crosslinked gels becom es morehomogeneous with chloromethylation.

关键词： Crosslinked Polystyrene Chloromethylation Fluorescence Spectroscopy Hypercrosslinked Gels

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A Hierarchically Porous Metal-Organic Framework from Semirigid Ligand for Gas adsorption

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Chinese Journal of chemistry 2016年第2期34卷 215-219页

作者： Lizhen Liu Yingxiang Ye Zizhu Yao Liuqin Zhang Ziyin Li Lihua wang Xiuling Ma Qian-Huo Chen Zhangjing Zhang Shengchang Xiang College of chemistry and Chemical Engineering Fujian Provincial Key Laboratory of Polymer Materials Fujian Normal University Fuzhou Fujian 350007 China state key laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

Hierarchically porous materials play an important role in facilitating mass transport and improving efficiency of adsorption and separation processes. In this paper, a new strategy is proposed to realize a hierarchically porous metal-organic framework （[Cu2（OH）（L）]＇（DMF）0.8 （FJU-11, H3L=3,5-（4-carboxybenzyloxy）benzoic acid, DMF= N,N-dimethylformamide） via using semi-rigid multi-carboxylic acids. Interestingly, FJU-11 possesses the large adsorption capacities and small isosteric heats toward CO2. The column breakthrough experiment for FJU-11 highlights its potential application in the separation of the flue gas.

关键词： metal-organic frameworks hierarchical pore semirigid ligand gas sorption column breakthrough experiment

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