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Nano Research 2024年第5期17卷 4582-4592页

作者： Tao Han Shufang Ding Zifan Wang Sirong Jiang Pengjiang Jing Tianshang Yi Yaqi Chen Chunzhi Jiang Xiaofeng Zhang Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education School of Physics and Electronic Electrical EngineeringXiangnan UniversityChenzhou 423000China National Engineering Laboratory for Modern Materials Surface Engineering Technology&The Key Lab of Guangdong for Modern Surface Engineering Technology Guangdong Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China

Thermal barrier coatings(TBCs)in gas turbine engines are used in expressly harsh environments;thus,assessing TBC integrity status is critical for safety and ***,traditional periodic maintenance involves visual inspections of the TBCs,requiring the gas turbine to be decommissioned and partially *** importantly,tiny defects or internal damages that easily cause coating failure cannot be *** this work,a new nondestructive evaluation(NDE)technique of TBCs based on quantum dot(QD)anion exchange is first explored *** exchanging anions between the Cl ions and the CsPbBr_(3) QDs,the degrees of salt corrosion of the TBCs are *** resultant NDE technique shows that the colour of the TBCs obviously changes from green to blue,accompanied by a large blueshift(~100 nm)of the photoluminescence(PL)peak *** addition,the relationship between the PL peak position and coating thermophysical properties indicates that the precision of this NDE technique may easily identify theμm-level of the thermal growth oxide(TGO)changes inside the TBCs.

关键词： thermal barrier coatings nondestructive evaluation CsPbBr_(3)quantum dot anion exchange thermal growth oxide

Synthesis and Characterization of Two Binuclear Macrocyclic Zinc(Ⅱ) Complexes by anion exchange

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Chinese Journal of Structural Chemistry 2014年第6期33卷 903-908页

作者：欧光川黄中文潘泽毅周东来袁先友 Department of Biology and Chemistry Hunan University of Science and Engineering Key Laboratory of Functional Organometallic Materials of Hunan Province College Hengyang Normal University

Two macrocyclic zinc（Ⅱ） complexes {[ZnL（VO3）2]·0.33H2O}n（1） and [ZnL（H2O）2][Ni（CN）4]（2）（L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane） have been obtained from the reactions of [ZnL]（ClO4）2 with NH4VO3 and K2[Ni（CN）4], respectively, and structurally characterized by elemental analysis, IR, XRPD, TG and X-ray diffraction. Single-crystal X-ray diffraction analyses indicated that the Zn（Ⅱ） atom lies on an inversion center and is octahedrally coordinated by four nitrogen atoms of the tetradentate macrocyclic ligand in the equatorial plane and two oxygen atoms of [VO4] tetrahedra in the axial positions in 1, and two oxygen atoms of two water molecules in 2. Complex 1 shows a three-dimensional structure, which is constructed by the links of [VO3]nn- chains with [ZnL]2＋, forming one-dimensional channels occupied by guest water molecules. The monomers of [ZnL（H2O）2]2＋ and [Ni（CN）4]2- are connected through the intermolecular hydrogen bonds to form a two-dimensional sheet in complex 2.

关键词： macrocyclic zinc(Ⅱ) complexes binuclear vanadium anion exchange

A novel channel-wall engineering strategy for two-dimensional cationic covalent organic frameworks:Microwave-assisted anion exchange and enhanced carbon dioxide capture

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Chinese Chemical Letters 2020年第1期31卷 193-196页

作者： Yusen Ding Yan Wang Yanjie Su Zhi Yang Jiaqiang Liu Xiaolin Hua Hao Wei Key Laboratorty for Thin Film and Microfabrication Technology of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China Department of Oral and Cranio-Maxillofacial Ninth People's HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200240China Department of Obstetrics Shanghai First Maternity and Infant HospitalTongji University School of MedicineShanghai 201204China

A novel channel-wall engineering strategy of the porous materials cationic covalent organic frameworks(COFs)is established based on rapid microwave-assisted anion exchange reaction and utilized to prepare a set of new *** to the interaction between the carbon dioxide(C02)and the acetate anion,the resulting SJTU-COF-AcO shows greatly enhanced carbon dioxide capacity up to 1.7 times of the pristine *** effect of the counteranions to CO2 capacity in the cationic COFs is investigated for the first time,which demonstrates that our channel-wall engineering strategy is a promising way to tailor the property of COFs for high CO2 capacity.

关键词： Covalent organic framework Channel-wall engineering Carbon dioxide capture Microwave-assisted synthesis anion exchange

Preparation of magnetic anion exchange resin and their adsorption kinetic behavior of reactive blue

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Chinese Chemical Letters 2011年第9期22卷 1091-1094页

作者： Chen Dong Shuang Feng Yang Fei Pan Qing Zhou Wei Ben Yang Ai Min Li State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China

Magnetic anion exchange resin （MD-1） was prepared from quaternization of magnetic copolymeric resin （glycidyl methacry- late-co-divinylbenzene）. For comparison, magnetic resin MD-0 without quaternization and non-magnetic resin （D-l） were also synthesized for the adsorption process. It was found that the adsorption was mainly contributed to the chemical interaction between quaternary ammonium groups and reactive blue RXHC. Due to the smaller size, MD- 1 had faster adsorption and desorption kinetics than D-1. Coupled with the advantage of easy separation, the magnetic anion exchange resin was considered to be superior to common anion exchange resin in removal of reactive dye.

关键词： Magnetic resin Glycidyl methacrylate Reactive blue RXHC anion exchange Adsorption kinetics

Facial synthesis of highly stable and bright CsPbX(X=Cl,Br,I)perovskite nanocrystals via an anion exchange at the water-oil interface

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Science China Materials 2021年第1期64卷 158-168页

作者： Cong Fang Ye Li Yuting Cai Tian-Liang Zhou Xueyuan Tang Rong-Jun Xie College of Materials Xiamen UniversityXiamen361005China Fujian Key Laboratory of Advanced Materials Key Laboratory of High Performance Ceramic Fibers(Ministry of Education)Xiamen UniversityXiamen361005China

Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic *** with the classical hot-injection method,the roomtemperature(RT)synthetic strategy is more facile and tender,but it is hard to obtain stable CsPbI3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of ***,we reported a simple approach to synthesize highly efficient and stable CsPbI3 as well as other colortunable CsPbX3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface,in which the as-synthesized pristine CsPbBr3 NCs in toluene were treated in aqueous solutions of HX(X=Cl,Br,and I)and protonated oleylamine(OAm)acted as a *** synthesized CsPbI3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 *** high efficiency and stability of the obtained CsPbX3 NCs were ascribed to the facts that:(ⅰ)the polar reagents were almost removed from the surface of NCs;(ⅱ)the defect-related nonradiative recombination was suppressed efficiently by surface passivation.

关键词： CsPbX3 perovskite nanocrystals anion exchange synthesis

Chemical Oxidation Effects on anion exchange and Nitrate Sorption Capacity of Biochar for Ruminal Methanogenesis Inhibition

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Journal of Agricultural Chemistry and Environment 2023年第3期12卷 250-262页

作者： Anna Kolganova Jeffrey Lynn Firkins Rattan Lal Kelly Elizabeth Mitchell Department of Animal Sciences College of Food Agricultural and Environmental Sciences The Ohio State University Columbus USA

The chemical composition of biochar is determined by the chemical profile of the material the by-product is made of and the pyrolysis conditions. Analysis of commercial biochar detected similarities to the chemical profile of hardwood, which was used as an object of pyrolysis for biochar production and showed the presence of bridge-forming cations, such as manganese, iron, and sodium. Despite frequently being reported in existing literature, the current study showed that the redox potential of biochar is not associated with biochar’s ability to recover certain anions. No association was detected between biochar’s redox potential and the material nitrate sorption capacity. In fact, higher redox potential values were associated with lower nitrate absorption. In the case of the anion exchange capacity of biochar, a direct association between this electrochemical property of the by-product and its redox potential was observed. However, redox potential’s impact on anion exchange capacity can be inhibited by the presence of organic compounds in biochar’s chemical profile. The chemical oxidation of biochar is a complex process and is a research priority for a potential role to mitigate enteric methanogenesis in livestock.

关键词： Methanogenesis Biochar Rumen Nitrates anion exchange Electrochemical Properties

In-situ solid-phase anion-exchange full-color perovskite light-emitting devices

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Science China Chemistry 2023年第6期66卷 1707-1713页

作者： Danyang Li Junjie Wang Jian Wang Junbiao Peng Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

Perovskite materials can realize the transition from green light to full-visible light spectrum by halogen anion ***,we designed an in-situ solid-phase anion-exchange method combined with inkjet printing to achieve full-color perovskite quantum dot light-emitting diodes(PeQD-LEDs).It was revealed that,in addition to the concentration,the anion-exchange rate was affected by the dielectric constant of the anion-exchange medium *** destroying the PeQD film,the higher the dielectric constant of the solvent,the faster the reaction *** at the same time,the solvent with higher dielectric constant will cause more defects,so the morphology,structure and properties of the perovskite films varied with *** chain length of amine salts in anion-exchange medium solute also played a key role in the stability of electroluminescence *** obtained blue-light devices had a maximum EQE of 4.6%at 481 nm and 6.6%at 493 nm prepared by *** inkjet printing,instead of printing red-,green-and blue-luminescent materials,we printed halogen-containing materials to achieve the in-situ solid-phase anion-exchange with underlying Pe QDs,and the inkjet-printed full-color device showed the current efficiency of 0.78 cd A^(-1).The method to achieve full-color devices by inkjet-printing halogen-containing materials can not only simplify the process,but also broaden the range of material selection,making the ink preparation more selective.

关键词： perovskite light-emitting diode inkjet print anion exchange full color

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Porous 2D Copper（Ⅰ） Complex of 1,3-Dicyanobenzene for anion exchange and Reversible Incorporation of Guest Molecules

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Chinese Journal of Chemistry 2006年第2期24卷 269-272页

作者：刘淑芹黑田·孝义宁桂玲宗像·惠 Department of Chemistry Dalian University of Technology Dalian Liaoning 116012 China Department of Science Kinki University Kowakae Higashi-Osaka Osaka 577-8502 Japan

The 2D porous copper（Ⅰ） complex with 1,3-dicyanobenzene （DCB）, [Cu（DCB）2]（PF6）（Me2CO） 1, exhibits channels along axis c, in which one molecule acetone and one anion PF6 per formula unit are included respectively. The reversible incorporation of guest acetone and acetonitrile, as well as the anion exchange from PF6^- to BF4^- or CF3SO3^-, was investigated by thermogravimetric （TG） analysis, ^1H NMR spectra and/or infrared absorption spectroscopy. Additionally, the incorporation of benzene and toluene into complex 1 was also discussed. Complex 1 exhibited size selectivity for guest inclusion or anion exchange.

关键词： 1,3-dicyanobenzene copper(Ⅰ) porous complex reversible incorporation anion exchange

Application of monodispersive anion exchangers in sorption and separation of Y^3＋ from Nd^3＋ and Sm^3＋ complexes with dcta

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Journal of Rare Earths 2008年第5期26卷 619-625页

作者： Halina Hubicka Dorota Kolodynska Department of Inorganic Chemistry Faculty of Chemistry Maria Curie-Sklodowska University Maria Curie-Sklodowska Sq.3 20-031 Lublin Poland

Rare earth complexes with trans-1,2-diaminocyclohexane-N,N,N ,N -tetraacetic acid （DCTA） of the Ln（dcta） type exhibited an unusual sequence of affinity on the polystyrene anion exchangers： pm^3＋〉Nd^3＋〉Sm^3＋〉Pr^3＋〉Ce^3＋〉Eu^3＋〉Gd^3＋〉La^3＋〉Sc^3＋〉Tb^3＋〉Dy^3＋〉 Ho^3＋〉Y^3＋〉Er^3＋〉Tm^3＋〉Yb3＋〉Lu^3＋[1]. Taking into account the position of Y^3＋, Sm^3＋, and Nd^3＋ in this affinity series, for the monodispersive polystyrene anion exchangers, Lewatit MonoPlus M 500, Lewatit MonoPlus M 600, Lewatit MonoPlus MP 500, Lewatit MonoPlus MP 64, and for the heterodispersive anion exchanger, Lewatit MP 62, the weight （Dg） and bed （Dv） distribution coefficients of these complexes and working ion exchange capacities （Cw） were determined. Based on these values, purifications of Y^3＋ from Nd^3＋ and Y^3＋ from Sm^3＋ in the macro-micro component system on these anion exchangers were studied. The application potential of this method was highlighted for the separation of Y^3＋ in the presence of Nd^3＋ and Sm^3＋. With 1 L of monodispersive and strongly basic polystyrene gel anion exchanger Lewatit MonoPlus M 500 in the acetate form, it is possible to obtain approximately 79 g Y2O3 purified from Nd2O3 and 70 g Y2O3 purified from Sm2O3 in the same process condition.

关键词： DCTA rare earth complexes anion exchange

Uptake of Multi-Disperse Starch by anion exchangers

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Journal of Physical Science and Application 2013年第3期3卷 147-155页

Demineralisation plants of power stations are not able to remove organics in all cases to a satisfied degree. The present work focuses on natural organic matter （NOM） and its interaction with anion exchanger and adsorber resins to optimize organics uptake. In this study, four different starches （one of them 14C-labelled） with different molecular size distributions were selected as model substances for the biopolymer fraction of NOM. Their uptake by various anion exchangers and adsorbers was measured in column experiments. Results are discussed in terms of size exclusion, anion exchange, adsorption, and hydrophilic/hydrophobic repulsion. In summary, at neutral pH, starch has been removed preferably by size-exclusion followed by adsorption, whereas anion exchange resins show higher uptake capacities than ＂pure＂ adsorber resins caused by stronger attraction between starch and polar functional groups of the anion exchangers. At acidic pH, the uptake of sulphate, as competitive adsorptive, leads to an earlier starch breakthrough at anion exchangers. Therefore, adsorbers are more effective. It was found that the higher the water content of the resins, the more effective the uptake is.

关键词： Water treatment natural organic matter anion exchange adsorption.