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Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanch.o zh.ng zh.nyu li Yijia Lei Baozeng Sun Xiaoyu Yu zh. Wang College of Chemistry and life Science Changchun University of Technology College of Chemical Engineering Changchun University of Technology Sch.ol of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x=40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-Noh AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the oh-conductivity remains at 89%of the initial value at 80°C and 3 M Koh for 1056 h.of *** cell polarization curve based on PTI-PTF50-Noh shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Anion exchange membranes Poly(p-terphenylene isatin) hydrophilic-hydrophobic phase separation Fluorinated group

Imaginary roots and weights for generalized Kac-Moody algebras

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Chinese Science Bulletin 1997年第15期42卷 1317-1318页

作者： Jin, YD li, zh.zh.ng, ZX Department of Fundamental Science North China Electric Power University Baoding China Department of Mathematics Hebei University Baoding China

ThE symbols in this letter are the same as those of ref. [1] and we

关键词： root

Determination of the extragalactic-planetary frame tie from Earth.orientation parameters

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Chinese Science Bulletin 1997年第4期42卷 315-318页

作者： Ping, JS li, JL Jin, WJ Qian, zh Joint Radw Astronomy Research Laboratory Shanghai Observatory Chinese Academy of Sciences Shanghai China

PRLSENTLY there are three kinds of realization of conventional celestial reference frames (CCRFs), i. e. the optical frame, the planetary frame and the extragalactic radio frame. 'Though the CCRFs are high in precision, due to the difference in (ⅰ) the constants, parameters, formulae and force models used to define the frames; (ⅱ) the methods and techniques

关键词： earth orientation parameters (EoP) celestial reference frame tie.

SUBSTRUCTURE PRECoNDITIoNERS FoR NoNCoNFoRMING PLATE ELEMENTS

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Journal of Computational Mathematics 1998年第4期16卷 289-304页

作者： Shi, ZC Xie, zh Chinese Acad Sci ICMSEC State Key Lab Sci & Engn Comp Beijing 100080 Peoples R China Chinese Acad Sci Inst Atmospher Phys LASG Beijing 100080 Peoples R China

In this paper, we consider the problem of solving finite element equations of biharmonic Dirichlet problems. We divide the given domain into non-overlapping subdomains, construct a preconditioner for Morley element by substructuring on the basis of a function decomposition for discrete biharmonic functions. The function decomposition is introduced by partitioning these finite element functions into the low and high frequency components th.ough the intergrid transfer operators between coarse mesh and fine mesh, and the conforming interpolation operators. The method leads to a preconditioned system with the condition number bounded by C(1 + log(2) h/h) in the case with interior cross points, and by C in the case without interior cross points, where h is the subdomain size and h is the mesh size. These techniques are applicable to other nonconforming elements and are well suited to a parallel computation.

关键词： substructure preconditioner biharmonic equation nonconforming plate element

Sensitive analysis of amino acids in injection liquor by reversed-phase hPLC

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Chinese Journal of Chemistry 1995年第2期13卷 163-168页

作者： ShANG, zh.YU, YN GUo, W JIANG, h zh.U, LM ChINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116012PEOPLES R CHINA

A convenient derivatization method of amino acids with 1-fluoro-2,4-dinitrobezene as reaction reagent and a separation system were described. The derivative amino acids were separated on a specific chemically bonded phase column with a simple linear gradient elution consisting of aqueous buffer and methanol. The eluate was detected by common ultraviolet absorption detector at 360 nm. The detection limits of amino acids were as low as 10 picomole. This method has been successfully applied to assay amino acid injection liquor used in hospital. It has good reproducibility and precision. The procedures avoid the requirements of particular derivative equipment and analyzer employed in conventional amino acid analysis.

关键词： AMINo ACIDS PRECoLUMN DERIVATIZATIoN REVERSED PhASE SEPARATIoN UV ABSoRPTIoN DETERMINATIoN

Comparison between hydrogen-transfer and fluoro-transfer reactions on the microcanonical unimolecular rate constants

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Chinese Journal of Chemistry 1995年第5期13卷 391-395页

作者： Feng, WL zh.ng, SW Wang, Y Wu, JN li, zh BEIJING NoRMAL UNIV DEPT CHEMBEIJING 100875PEOPLES R CHINA

The microcanonical rate constants for the hydrogen-transfer process of hCCF (reaction 7) and the fluoro-transfer process of FCCF (reaction 8) are carried out with tunneling correction and curvature correction. The results show that the tunneling effects and curvature effects on the rate constant of reaction 7 is quite different from that of reaction 8. The rate constants for different rotational states are also studied for these reactions.

关键词： microcanonical rate constant tunneling effect curvature correction

Laser-Induced highly Stable Conductive hydrogels for Robust Bioelectronics

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NANo-MICRo LETTERS 2025年第1期17卷 1-4页

作者： li, Yibo zh.u, h.o Yang, huayong Xu, Kaichen zh.jiang Univ Sch Mech Engn State Key Lab Fluid Power & Mechatron Syst Hangzhou 310058 Peoples R China

Despite the promising progress in conductive hydrogels made with pure conducting polymer, great challenges remain in the interface adhesion and robustness in long-term monitoring. To address these challenges, Prof. Seung hwan Ko and Taek-Soo Kim's team introduced a laser-induced phase separation and adhesion method for fabricating conductive hydrogels consisting of pure poly(3,4-ethylenedioxyth.ophene):polystyrene sulfonate on polymer substrates. The laser-induced phase separation and adhesion treated conducting polymers can be selectively transformed into conductive hydrogels that exhibit wet conductivities of 101.4 S cm-1 with a spatial resolution down to 5 mu m. Moreover, they maintain impedance and charge-storage capacity even after 1 h.of sonication. The micropatterned electrode arrays demonstrate their potential in long-term in vivo signal recordings, highlighting their promising role in the field of bioelectronics.

关键词： Laser processing Conductive hydrogels Stable interface Bio-interfacing electrodes Bioelectronic application

Nanostructured Zno/BiVo_(4)I-scheme heterojunctions for piezocatalytic degradation of organic dyes via harvesting ultrasonic vibration energy

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 488-497页

作者： Yiling li Xiaoyao Yu Yingjie zh.u Yao lin Ying Wu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China

BiVo_(4)porous spheres modified by Zno were designed and synthesized using a facile two-step *** resulting Zno/BiVo_(4)composite catalysts have shown remarkable efficiency as piezoelectric catalysts for degrading Rhodamine B(RhB)unde mechanical vibrations,they exhibit superior activity compared to pure *** 40wt%Zno/BiVo_(4)heterojunction composite displayed the highest activity,along with good stability and *** enhanced piezoelectric catalytic activity can be attributed to the form ation of an I-scheme heterojunction structure,which can effectively inhibit the electron-hole ***,hole(h+)and superoxide radical(·o_(2)^(-))are proved to be the primary active ***,Zno/BiVo_(4)stands as an efficient and stable piezoelectric catalyst with broad potential application in the field of environmental water pollution treatment.

关键词： piezoelectric catalytic heterojunction dye degradation ultrasonic vibration

Tailoring light–Matter Interactions in overcoupled Resonator for Biomolecule Recognition and Detection

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Nano-Micro Letters 2025年第1期17卷 262-280页

作者： Dongxiao li hong zh.u zh.h.o Ren Cheng Xu Chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from the obstacles of low sensitivity,narrow bandwidth,and asymmetric Fano resonance ***,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(oC-hμresonator)by precisely controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency detuning *** observed a strong dependence of the sensing performance on the coupling state,and demonstrated that oC-hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asymmetric Fano *** characteristics represent a breakth.ough in SEIRA tech.ology and lay the foundation for specific recognition of biomolecules,trace detection,and protein secondary structure analysis using a single array(array size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy of 100%.Finally,we demonstrated the potential of oC-hμresonator for SARS-CoV-2 *** findings will promote the wider application of SEIRA tech.ology,while providing new ideas for other enhanced spectroscopy tech.ologies,quantum photonics and studying light–matter interactions.

关键词： Plasmonic nanoantennas light-matter interaction Surface-enhanced infrared absorption overcoupled Biosensing