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Prussian Blue/Cellulose Acetate Thin Film Composite Nanofiltration Membrane for molecular sieving and Catalytic Fouling Resistance

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Chinese Journal of Polymer Science 2023年第4期41卷 593-604,I0009页

作者： Hai-Bo Lin Jian-Guo Zhao Na Lu Qiu Han Jian-Qiang Wang Jian-Min Guan Xiao Wang Fu Liu Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China Qinghai University Qinghai810016China University of Chinese Academy of Sciences Beijing100049China

Nanofiltration(NF)membranes as high selective separators are appealing for molecular sieving,which still remains a great challenge for the mixed dyes with same *** this study,cellulose acetate(CA)membranes were firstly aminated by ethylene imine polymer(PEI),and then the thin film of metal organic frameworks(MOFs)were constructed onto aminated CA membrane through forward-diffusion,slow crystallization and in situ growth of Fe Co-Prussian blue(FeCo-PB)crystallization *** designed PB@CA composite NF membrane shows an ideal rejection for Congo red(CR)/methyl orange(MO)mixture solution,with 99.7%±0.2%for CR and 33.5%±2%for *** addition,the composite NF membrane demonstrated good efficiency for photocatalytic degradation of organic fouling(permeability recovery ratio was up to 92%)due to the active FeCo-PB ***,this work provides a practical strategy to prepare MOFs mediated thin film composite nanofiltration membrane for precise molecular sieving and catalytic antifouling performances.

关键词： Nanofiltration membrane molecular sieving Catalytic fouling resistance Prussian blue

Efficient capture of C_(2)H_(2)from CO_(2)and C_(n)H_(4)by a novel fluorinated anion pillared MOF with flexible molecular sieving effect

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Nano Research 2023年第2期16卷 3536-3541页

作者： Lingyao Wang Nuo Xu Yongqi Hu Wanqi Sun Rajamani Krishna Jiahao Li Yunjia Jiang Simon Duttwyler Yuanbin Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life SciencesZhejiang Normal UniversityJinhua 321004China Van’t Hoff Institute for molecular Sciences University of AmsterdamScience Park 904Amsterdam 1098 XHthe Netherlands Department of Chemistry Zhejiang UniversityHangzhou 310027China

The efficient separation of acetylene(C_(2)H_(2))from carbon dioxide(CO_(2))and CnH_(4)(n=1 and 2)to manufacture high purity C_(2)H_(2)and recover other light hydrocarbons is technologically important,while posing significant ***,we reported a new TiF62−anion(TIFSIX)pillared metal-organic framework(MOF)ZNU-5(ZNU=Zhejiang Normal University)with ultramicropores for highly selective C_(2)H_(2)capture with low adsorption heat through gate opening based molecular sieving ***-5 takes up a large amount of C_(2)H_(2)(128.6 cm^(3)/g)at 1.0 bar and 298 K but excludes CO_(2),CH_(4),and C_(2)H_(4).Such high capacity has never been realized in MOFs with molecular *** breakthrough experiments further confirmed the highly selective C_(2)H_(2)separation performance from multi-component gas mixtures.3.3,2.8,and 2.2 mmol/g of C_(2)H_(2)is captured at ZNU-5 from equimolar C_(2)H_(2)/CO_(2),C_(2)H_(2)/CO_(2)/CH_(4),and C_(2)H_(2)/CO_(2)/CH_(4)/C_(2)H_(4)mixtures,***,2.6,2.0,and 1.5 mmol/g of>98%purity C_(2)H_(2)can be recycled from the desorption *** high working capacity,low adsorption heat,as well as good recyclability,ZNU-5 is promising for C_(2)H_(2)purification.

关键词： metal-organic frameworks(MOFs) C_(2)H_(2)/CO_(2)separation acetylene recovery molecular sieving flexible MOFs

Symmetric Variation of Monomers for Constructing 1D/2D Imine-Based Covalent Organic Frameworks

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CCS Chemistry 2024年第4期6卷 941-952页

作者： Pengzhong Shi Kai Wang Ziao Chen Jiawei Wang Kaifu Lin Ngangnseh Leboh Solange Yanfeng Yue Zhiyong Guo College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108 Department of Chemistry Delaware State UniversityDoverDelaware 19901

Synthetic control of topology connectivity is the crowning achievement for covalent organic framework(COF)*** a large number of one-,two-,and three-dimensional(1D,2D,and 3D)COFs have been reported,their topology structure constructions are restricted to the use of symmetric monomers with the purpose of increasing the crystallinity and/or ***,three imine-linked COFs with different topology nets(namely,sql-b and sql-c)were constructed by symmetric variation of monomers via the condensation of a tetra-amine monomer with a D2h-symmetry and lower C_(2v)-symmetric dialdehyde monomers,bearing a phenolic hydroxyl group at different *** results indicated that a reasonable introduction of the phenolic hydroxyl group could effectively tune the topological structure of COFs at the molecular level during the crystallization ***,the remarkable difference in the dye uptake ability between these COF materials indicated that the fabricated specific pore geometries,as well as different steric hindrance and H-bonding interactions,played a pivotal role in accessing molecules in the ***,this work might boost the explorations of COF materials with expected topologies and pore geometries from conventional monomers through bottom-up synthesis methodology by molecular designing and engineering.

关键词： covalent organic framework topology/dimension regulation molecular symmetry substituent effect molecular sieving

Efficient hexane isomers separation in isoreticular bipyrazolate metal-organic frameworks:The role of pore functionalization

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Nano Research 2021年第2期14卷 532-540页

作者： Rebecca Vismara Corrado Di Nicola Rodrigo Gil-San Millan Kostiantyn V.Domasevich Claudio Pettinari Jorge A.R.Navarro Simona Galli Dipartimento di Scienza e Alta Tecnologiay University delVInsubria 22100 ComoItaly School of Science and Technology University ofCamerino62032 Camerino(MC)Italy Departamento de Quimica Inorganica Universidad de Granada18071 GranadaSpain Taras Shevchenko National University of Kyiv 01601 KyivUkraine School of Pharmacy University of Camerino62032 Camerino(MC)Italy Istituto di Chimica dei Composti Organometallici(ICCOM-CNR) 50019 Sesto FiorentinoItaly Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali 50121 FirenzeItaly Department of Chemistry University of LiverpoolLiverpool L73NYUK

Hydrocarbons separation in petrochemical industries is a key,energy-consuming stage in the manufacture of high-quality added-value products—hence the need for more efficient materials and environmentally friendly methodologies to improve this *** this context,we have studied the effect of metal-organic frameworks(MOFs)pore functionalization in hexane isomers separation,isolating the robust isoreticular zinc(ll)bipyrazolates Zn(BPZ),showing no pore decoration,Zn(Me_(2)BPZ),the pores of which are decorated with apolar methyl groups,and Zn(BPZ(NH_(2))_(2)),the spacers of which possess polar Lewis-basic functions(H_(2)BPZ=1H,1'H-4,4'-bipyrazole;H_(2)Me_(2)BPZ=3,3'-dimethyl-1H,1'H-4,4'-bipyrazole;H_(2)BPZ(NH_(2))_(2)=3,5-diamino-1H,1'H-4,4'-bipyrazole;DMF=dimethylformamide).After characterizing Zn(BPZ(NH_(2))_(2))as per its crystal structure and thermal behaviour,and all the three MOFs as per their textural properties,we investigated,from the experimental and computational points of view,the impact of the square one-dimensional channels decoration on the separation of the hexane isomers,demonstrating the relevance of pore constrictions in the resolution of the title alkanes mixture.

关键词： adsorption molecular sieving nitrogen-donor ligands gas separation pow der diffraction variable-tem perature pulse gas chromatography

Ultrathin 2D Covalent Organic Framework Film Fabricated via Langmuir-Blodgett Method with a“Two-in-One”Type Monomer

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Chemical Research in Chinese Universities 2022年第2期38卷 440-445页

作者： MENG Weijia LI Yang ZHAO Ziqiang SONG Xiaoyu LU Fanli CHEN Long Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin 300072P.R.China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012P.R.China

In recent years, covalent organic frameworks(COFs) are evolving as a novel kind of porous materials for catalysis and molecular separation, gas adsorption, etc. Various functional building blocks have been explored to tune the pore channels, including the pore size and structures. In this article, a new terphenyl(TP) based COF(TP-COF) was developed via a “two-in-one” strategy by using a symmetric A2B2monomer, i.e., 4,4''-diamino-2',5'-diformyl-1,1':4',1''-terphenyl(DADFTP). The pore size of TP-COF was only 0.99 nm by shortening the arm length of the DADFTP monomer. Freestanding, continuous and ultrathin COF films could be facilely prepared at the air-liquid interface through the modified Langmuir-Blodgett(LB) method. TP-COF films exhibited high rejection of over 90% for dyes removal.

关键词： “Two-in-one”strategy Covalent organic framework film molecular sieving Pore engineering