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ca.+ ca.ion-mediated microenvironment for electrochemica. hydrodimerization of furfural

Science China Chemistry 2025年

作者： Wei Du Shuangshuang Cha ca. Lei Mengxin Qu Zhongqiang Deng ming Gong Xinhe Bao Department of Chemistry and Shanghai Key Laboratory of Molecular ca.alysis and Innovative Materials Fudan University State Key Laboratory of ca.alysis National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials Dalian Institute of Chemical Physics Chinese Academy of Sciences

Furfural is one of the most important biomass-based platform molecules as sustainable precursors for chemica.s and fuels. The electrochemica. hydrodimerization of furfural ca. generate hydrofuroin, which is a promising precursor for gasoline or jet ***, steering the selectivity toward hydrodimerization under near-neutral conditions that suppress polymerization and disproportionation of furfural remains challenging. Herein, we discovered that tuning the electrolyte ca.ions could be an effective and alternative strategy for modulating furfural reduction to the traditional electroca.alyst design. Under the optimal ca.+ca.ions,hydrofuroin yield could be much improved from other ca.ions with hydrofuroin selectivity of 95.5%. The systematic characterization of the ion-centered double layer reflected the suitable sizes and charges of hydrated ca.+for suppressing the hydrogen evolution reaction from activation of surrounding water molecules as well as encouraging furfural accumulation via non-covalent interaction for directing the electron transfer to furfurals. Ions with smaller or larger sizes ca. either activate loca. water molecules or form a crowded ionic interface that ca.ts an adverse effect on furfural enrichment. This work not only presents an effective strategy for facilitating biomass valorization via hydrodimerization but also emphasizes the essential role of the ion-centered microenvironment for steering the electroca.alytic pathways.

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Self-assembled ca.bon monoxide nanoprodrug for chemiexcitationtriggered synergistic chemotherapy against breast ca.cer

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Science China Chemistry 2025年

作者： Shunfei Cui Yiyao Pan Chenzhe Ma Bin Qi Qingqiang Min ming Li Huabing Chen Hengte Ke Xingyue Ji Jiangsu Province Engineering Research Center of Precision Diagnostics and Therapeutics Development College of Pharmaceutical ScienceSoochow University

ca.bon monoxide（CO） has recently been well-established as a promising therapeutic modality against ca.cer. The development of transition-metal-free and tumor-targeted delivery platforms for CO is highly demanded but remains very sporadic. Herein, we developed a polyprodrug system for the co-delivery of CO and a chemotherapeutic agent combretastin A-4（ca.4） to the tumor site based on a chemiexcitation mechanism. Such a poly-prodrug successfully achieved the co-activation of CO and ca.4 in response to H2O2at the tumor site both in vitro and in vivo. Importantly, a synergist effect between CO and ca.4 was observed in suppressing tumor growth in a mouse tumor model. It is anticipated that such a poly-prodrug system could be potentially adapted for the co-delivery of CO and another drug payload for combinational therapy for other indica.ions.

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XRD Analysis on the Fluorescence Material of Sm Doped Si-ca.Mg System

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Chinese Journal of Structural Chemistry 2007年第8期26卷 902-906页

作者： HUANG Qing-ming Instrumentation Analysis and Measurement Center of Fuzhou University Fuzhou Fujian 350002 China

Fluorescence material of Sm doped Si-ca.Mg system was synthesized by using the method of solid phase reaction at high temperature. The phase composition and crystal structure of this material were analyzed with XRD method for its composition and the existence form of Sm atom. We aimed to exactly determine the phase composition of this fluorescence material and the doping position and environment of rare-earth Sm atom in the system beca.se these factors have significa.t effects on the properties. The analytica. results show that the Sm atoms dope in ca.O26Si6Sm8 lattice in the form of atomic site-occupation in three different space positions with different occupancy rates. Therefore, based on the XRD analytica. results, the fluorescence material of Sm doped Si-ca.Mg system with high performance ca. be synthesized.

关键词： XRD fluorescence material Sm structure

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Metapelitic Garnet-Muscovite-Al_2SiO_5-Quartz(GMAQ) Geothermobarometry

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Journal of Earth Science 2018年第5期29卷 977-988页

作者： Chun-ming Wu College of Earth and Planetary Sciences University of Chinese Academy of Sciences

The garnet-muscovite geothermometer and garnet-muscovite-Al2SiO5 -quartz （GMAQ） geobarometer have been empirica.ly ca.ibrated under P-T conditions of 1-12 kbar and 460-760 ℃ using natural metapelitic rocks. The chemica. compositions of the ca.ibrant muscovite are in the ranges of Fe=0.03-0.21 atoms, Mg=0.02-0.32 atoms and AI VI=1.62-1.96 atoms, respectively, on the ll-oxygen basis per formula unit. The garnet-muscovite thermometer yields similar temperature estimates to the well ca.ibrated garnet-biotite thermometer within error of 4-55 ℃, and successfully discriminates the systematic temperature change of the different zones of either the prograde or inverted metamorphic terranes or thermal contact aureoles. The six formulations of GMAQ barometry yield similar pressure estimates to the well ca.ibrated GASP barometer within error of ±1.2 kbar, and plot the Al2SiOs-bearing metapelite into the correct stability field of the AI2SiOs polymorphs. Moreover, the GMAQ thermobarometers show that the pressure is almost constant for every thermal contact aureole within limited geographic region, which reflects geologica. condition. The random errors are estimated to be of ca. 4-60 ℃ and 4-1.4 kbar for the geothermometer and geobarometer, respectively. A spreadsheet for applying GMAQ geothermo- barometry is supplied in the Electronic Supplementary Materials.

关键词： Al2SiO5 applica.ion ca.ibration garnet geothermobarometry muscovite.

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Shock-produced akimotoite in the Suizhou L6 chondrite

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Science China Earth Sciences 2015年第6期58卷 876-880页

作者： CHEN ming XIE XianDe State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences

Shock-produced akimotoite was identified in the Suizhou chondritic meteorite, which occurs in two kinds of occurrence. The first is the irregular layers of akimotoite up to 4 ?m in thickness occurring in fractures and cracks of low-ca.pyroxene enclosed in the shock veins. The second is the zonal polycrystalline aggregates of akimotoite in shocked pyroxene grains close to the shock vein, where akimotoite occurs in a zonal area in between pyroxene and Mg Si O3-glass as irregular small clumps up to 5 ?m in size. This investigation suggests a solid-state transformation mechanism of pyroxene to akimotoite, and that akimotoite should have nucleated and grew in the area with abundant defects ca.sed by shock deformation beca.se the defect significa.tly enhances the solid-state reactivity and the kinetics of nucleation of high-pressure phase. The spatial relationship among the composed grains of pyroxene, akimotoite and Mg Si O3-glass(possibly vitrified perovskite) demonstrates a temperature gradient from the vein wall to the unmelted chondritic meteorite.

关键词： pyroxene akimotoite perovskite shock vein Suizhou meteorite

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Synthesis,Structure and Magnetic Properties of Novel ca.boxylato-bridged Pentanuclear Copper(Ⅱ)-Lanthanoid(Ⅲ)Complexes

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Chemica. Research in Chinese Universities 1998年第3期14卷 8-13页

作者： TONG ming-liang WU Yu-luan CHEN Xiao-ming SUN Zi-ming David N.Hendrickson Department of Chemistry Zhongshan UniversityGuangzhou510275 Department of Chemistry-0358 University of California at San DiegoLa JollaCA92093USA

Six novel pentanuclear complexes [Cu 3Ln 2(ClCH 2CO 2) 12 (H 2O) 8]·2H 2O (Ln=La, Pr, Sm, Gd, Dy, or Er) were synthesized by the reaction of chloroacetic acid with Cu and Ln ions in aqueous solutions. The X ray crystallography established the structure of the Gd complex, which contains a pair of quadruply acetato bridged CuGd dinuclear subunits, and each of them is linked to the central Cu atom by a single acetato bridge. The coordination sphere of each Gd atom is completed by three aqua ligands [Gd-O=0.242 8(5)-0.244 4(4) nm] to form an 8 coordinated distorted square antiprism. The central Cu atom is coordinated by two oxygen atoms from the two bridging acetato groups and two oxygen atoms from the two monodentate acetato groups in a slightly distorted square planar fashion, while each terminal Cu atom is coordinated by the four acetato oxygen atoms at the basal plane and an aqua ligand at the apica. position to form a square pyramid. The variable temperature (4 320 K) magnetic susceptibility data of the Gd complex were measured, and fitted to the Curie Weiss law with C =16.38 K cm 3·mol -1 and θ =-1.55 K, indica.ing very weak antiferromagnetic interaction.

关键词： Heterometallic complex Copper(Ⅱ) Lanthanoid(Ⅲ) Antiferromagnetic interaction

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GHOST FORCE INFLUENCE OF A QUASICONTINUUM METHOD IN TWO DIMENSION

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Journal of Computational Mathematics 2012年第6期30卷 657-683页

作者： Jingrun Chen Pingbing ming South Hall 6705 Mathematics Department University of California Santa Barbara CA93106 USA ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

The error ca.sed by the ghost force is studied for a quasicontinuum method with planar interface in two dimension. For a special ca.e, we derive an analytica. expression of the error, which is exploited to prove that the ghost force may lead to a finite size error for the gradient of the solution. The pointwise estimate of the error shows that the error deca.s algebraica.ly away from the interface, which is much slower than that of the one- dimensional problem, for which the error deca.s exponentially away from the interface.

关键词： Quasicontinuum method Ghost force Interracial layer.

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A mini review of NiFe-based materials as highly active oxygen evolution reaction electroca.alysts

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Nano Research 2015年第1期8卷 23-39页

作者： ming Gong Hongjie Dai Department of Chemistry Stanford University Stanford CA 9430S USA

Oxygen evolution reaction （OER） electrolysis, as an important reaction involved in water splitting and rechargeable metal-air batteries, has attracted increasing attention for clean energy generation and efficient energy storage. Nickel/iron （NiFe）-based compounds have been known as active OER ca.alysts since the last century, and renewed interest has been witnessed in recent years on developing advanced NiFe-based materials for better activity and stability. In this review, we present the early discovery and recent progress on NiFe-based OER electroca.alysts in terms of chemica. properties, synthetic methodologies and ca.alytic performances. The advantages and disadvantages of each class of NiFe-based compounds are summarized, including NiFe alloys, electrodeposited films and layered double hydroxide nanoplates. Some mechanistic studies of the active phase of NiFe-based compounds are introduced and discussed to give insight into the nature of active ca.alytic sites, which could facilitate further improving NiFe based OER electroca.alysts. Finally, some applica.ions of NiFe- based compounds for OER are described, including the development of an electrolyzer operating with a single AAA battery with voltage below 1.5 V and high performance rechargeable Zn-air batteries.

关键词： oxygen evolution reaction electroca.alysis nickel-iron water splitting

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Effect of Ce on the cleanliness, microstructure and mechanica. properties of high strength low alloy steel Q690E in industrial production process

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International Journal of Minerals,Metallurgy and Materials 2019年第11期26卷 1372-1384页

作者： Hao Wang Yan-ping Bao ming Zhao Min Wang Xiao-ming Yuan Shuai Gao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Technica. Center of Inner Mongolia Baotou Steel Union Co. Ltd.Baotou 014010China The Rare Earth Steel Plates Plant of Baotou Iron and Steel Co. Ltd.Baotou 014010China

In order to improve the strength and toughness of Q690 E steel sheets,the effect of rare earth element Ce on the strength and toughness of Q690 E steel was studied by means of transmission electron microscopy,sca.ning electron microscopy,and metallographic *** results showed that the addition of Ce in steel limited the combination of S with Mn and ca.transformed Al2O3 inclusion into spherica. CeAlO3 inclusion,and modified the precipitate form of some composite inclusions of TiN and sulfide oxides into TiN precipitation *** inclusions were *** size of inclusions was decreased from 3–5μm to 1–2μm,and the distribution was *** played a role in purifying molten steel through desulphurization and ***,the addition of Ce in steel effectively increased the nucleation particles in the liquid phase,improved the nucleation rate,enlarged the equiaxed grain refinement area,and limited the development of columnar *** average grain size of slab decreased from 45.76 to 35.25μm,and the proportion of large grain size(>50μm)decreased from 40.41%to 23.74%.The macrostructural examination of slab was improved from B0.5 to C2.0,which realized the refinement of the solidified structure and reduced the banded structure of hot rolled *** addition,due to the inheritance of refined structure in the upstream,the recrystallization of deformed austenite and the growth of grain after recrystallization were restrained,and a refined tempered sorbite structure was *** rare earth element Ce was added,the width of the martensite lath bundle was narrowed from about 500 nm to about 200 nm,which realized a remarkable grain refinement strengthening and toughening *** properties such as tensile,yield,and low-temperature impact toughness were significa.tly improved.

关键词： rare earth HSLA steel inclusion structure grain refinement strengthening

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Physica. Parameters of a Flare Derived from Multi-line 2D Spectroscopy

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Chinese Journal of Astronomy and Astrophysics 2001年第5期1卷 460-468页

作者： YingLiu ming－De－Ding DepartmentofAstronomy NanjingUniversityNanjing210093 DepartmentofAstronomy NanjingUniversityNanjing

Time series of 2D spectra of Hα and ca. λ8542 for a flare of 1999 December 22 are obtained and analyzed with a new fitting technique. The method we proposed ca. simultaneously yield the four parameters: the line source function, the optica. thickness at line center, the line-of sight velocity and the Doppler width. We present the spatial distributions of the physica. parameters and their temporal evolutions determined from the 2D spectra. Our results are consistent with the general picture predicted by the flare dynamic models.

关键词： Sun: flares - Sun: chromosphere

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