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Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for D2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-Ang Nan Qing li xiufang li Zi-Xiu Lu linzhe Lü Jin liu Luyao liu Wenjing Wang Wei Wang Daqiang Yuan You-Gui Huang State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for D2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8L12（μ3-OH）24（X）]1clusters （L=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8L12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）L12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8L12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8L12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8L12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to D2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for D2/***,compound 1 demonstrates moderate D2/H2separation at 77 K (retention time:～7 min/g for D2/H2/Ne （10/10/80 vol%） in a flow of 5 mL

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Synthesis and characterization of super paramagnetic composite photocatalyst-Titania/silica/nickel ferrite

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Particuology 2011年第5期9卷 475-479页

作者： Yu li xiufang Dong Junping li School of Chemical Engineering and Environment North University of China Taiyuan 030051 Shanxi China

Composite photocatalysts with TiO2 porous shell and magnetic core were synthesized by using NiFe2O4 as a magnetic core, SiO2 as an intermediate layer and polyethylene glycol with molecular weight of 1000 （PEG 1000） as a template direction agent. The samples were characterized with N2 adsorption-desorption, X-ray diffraction （XRD）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, vibrating sample magnetometry （VSM） and ultraviolet-visible （UV-vis） spectroscopy. The results showed that the obtained composites are spherical particles about 50 nm in diameter. The mesoporous TiO2 with magnetic core calcined at 350 ℃, 450 ℃, and 550 ℃ was found to have, respectively, different specific surface areas （94, 86, and 68 m^2/g） and average pore sizes （1.4, 2.2, and 2.8 nm）. The photocatalytic activity was investigated for degradation of nitrobenzene under UV irradiation. Nitrobenzene was decomposed in 300 min under irradiation of an 8 W UV lamp with a peak wavelength of 253.7 nm. The composite nanoparticles exhibited high photocatalytic efficiency and super paramagnetic nature for cleaning polluted water by magnetic separation.

关键词： Titania Mesoporous Photocatalyst Core-shell

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Influences of Similar Elements on Glass Forming Ability and Magnetic Properties in Al-Ni-La Amorphous Alloy

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Journal of Materials Science & Technology 2010年第2期26卷 146-150页

作者： Guihua li Weimin Wang xiufang Bian li Wang Jiteng Zhang Rui li Tao Huang Key Laboratory for liquid-Solid Structureal Evolution and Processing of Materials Ministry of Education ShandongUniversity Jinan 250061 China

Similar element substitution has been applied for improving glass forming ability （GFA） in AI86NigLa5 amor- phous alloy. The effects of La-Ce and Ni-Co pairs on the GFA, magnetic properties and hardness of Al-Ni-La alloy were investigated by using X-ray diffraction （XRD）, transmission electron microscopy （TEM）, differential scanning calorimetry （DSC）, magnetometer and hardness-tester. The results show the GFA of the samples in the order of Al86（Ni0.5Co0.5）9（La0.5Ce0.5）5〈 A186Ni9Las〈A186Ni9（La0.5Ce0.5）5, implying that similar element substitution has a limited enhancing effect on the GFA of the present Al-Ni-La alloy. In addition, the measured samples display a diamagnetic behavior at room temperature. The variations of diamagnetic behavior as well as the microhardness of the samples are strongly dependent on the microstructure, i.e., the amounts of the icosahedral structure and precipitates, after the similar element substitution in the Al-Ni-La alloy.

关键词： X-ray diffraction (XRD) Transmission electron microscopy (TEM) Diamagneticbehavior Icosahedral structure

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Fine Machining of Large-Diameter 6H-SiC Wafers

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Journal of Materials Science & Technology 2006年第5期22卷 681-684页

作者： xiufang CHEN Juan li Deying MA Xiaobo HU Xiangang XU Minhua JIANG State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Three main machining processes of large-diameter 6H-SiC wafers were introduced in this paper. These processes include cutting, lapping and polishing. Lapping causes great residual stresses and deep damage layer which can be reduced gradually with subsequent polishing processes. Surfaces prepared by mechanical polishing （MP） appeared a large number of scratches with depth of 5-8 nm. These scratches can be effectively removed by chemo-mechanical polishing （CMP）. After CMP. extremely smooth and low damage layer surface with roughness Ra=0.3 nm was obtained. Atomic force microscopy （AFM） and optical microscopy were used to observe the surface morphology of samples and a high resolution X-ray diffractometer （HRXRD） was used for the crystal lattice perfection of the subsurface region. Changes of surface residual stresses during machining processes were investigated by HRXRD.

关键词： 6H-SiC Chemo-mechanical polishing (CMP) Roughness

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Effects of enzymolysis method on the preparation of peptides from wheat flour

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Food Bioscience 2022年第5期49卷 1327-1333页

作者： Guangjie An Mengya Wei Zhangcun Wang Xuewei Zhao xiufang li Zhizheng He Food and Bioengineering Department Zhengzhou University of Light IndustryZhengzhou450001China Collaborative Innovation Center of Food Production and Safety Zhengzhou450001China Henan Key Laboratory of Cold Chain Food Quality and Safety Control Zhengzhou450001China

The preparation of wheat peptide by Alcalase hydrolysis of wheat flour was investigated in this *** effects of reaction parameters such as solid-liquid ratio,enzyme addition,and enzymolysis time were evaluated with the purity and yield of peptides as indexes by the single-factor *** optimal enzymolysis conditions from the orthogonal test were as follows:the solid-liquid ratio of 1:7,enzyme addition(E/S)of 1.2%,reaction time of 2 *** yield and purity of peptides were 83%and 72%,*** configuration of enzymatic hydrolysate from different enzymolysis conditions was observed by the scanning electron microscope(SEM).The results showed that the particle size of the enzymatic hydrolysate was much smaller than that of the original material,and the particle size of the enzymatic hydrolysate changed with the degree of hydrolysis(DH).The molecular weight(MW)of peptides under different enzymolysis conditions was analyzed by gel filtration chromatography,and the results showed that the proportion of small peptides(<1 kDa)was up to 78.8%.

关键词： Wheat flour Enzymolysis Peptide Purity Yield

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Emission mechanism in the terbium complex doped PVK system

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Frontiers of Optoelectronics 2008年第Z1期1卷 130-133页

作者： xiufang li Zhenbo DENG Yuanyuan ZHANG Yumeng SHI Ruifen WANG Institute of Optoelectronic Technology Key Laboratory of Luminescence and Optical Information Technology Ministry of Education Beijing Jiaotong University Chemistry College Hebei Normal University

A new kind of rare earth（RE） complex Tb（oMBA）3phen was synthesized and used as an emitting material in *** material was doped into poly（N-vinylcarbazole）(PVK) as the emitting layer,which was made by spin *** kinds of devices were fabricated with the structures:（A） ITO/PVK:Tb（oMBA）3phen/liF/Al;（B） ITO/PVK:Tb（o-MBA）3phen/BCP/AlQ3/liF/Al;（C） ITO/BCP/PVK:Tb（oMBA）3phen/AlQ3/liF/*** green emission could be obtained from device（A） and（C）.The photoluminescence（PL） and electroluminescence（EL） mechanisms of this material had been *** there was an overlap between the PL spectrum of PVK and the excitation spectrum of the terbium complex,there should be a Forster energy transfer process between *** excitation spectrum of PVK doped Tb（o-MBA）3phen system is similar with the excitation spectrum of PVK,yet it is different from that of Tb（o-MBA）***,the emission of Tb（o-MBA）3phen should partly come from the excitation of PVK while in the organic light-emitting diode（OLED）,based on Tb（o-MBA）3phen,the emission mainly comes from the direct recombination of electron and *** green emission can be obtained from the optimized multi-layer device（C） and the highest EL brightness reached 180 cd/m2at the voltage of 17 V.

关键词： terbium complex organic light-emitting diode (OLED) exciton

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Study on correlation between C-reactive protein and gestational diabetes mellitus

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Journal of Nanjing Medical University 2007年第6期21卷 382-385页

作者： Xiaohong li xiufang Lu Department of Obstetrics and Gynecology North District of the Affiliated Suzhou Hospital of Nanjing Medical University Suzhou 215008 Jiangsu Province China

Objective：To investigate correlation between C-reactive protein（CRP） and gestational diabetes mellitus（GDM）, Methods：Twentyfive GDM women were served as study group, and thirty normal pregnant women were selected as control group. The serum FPG, 2hPG, HbAlc and CRP levels and the leukocyte count were detected in the two groups, in order to observe the relationship between gestational diabetes mellitus and inflammatory markers. Results：The age and gestational week did not show difference in the two groups（P〉 0.05）. But there was a significant difference in body mass index（BMI） between the GDM group and the controtgroup（P 〈 0.05）. The serum FPG, 2hPG, HbAlc and CRP levels and the leukocyte count in the GDM group were higher than those in the control group, and the difference was significant（P 〈 0.05）, There was positive correlation between serum C-reactive protein value and FPG, 2hPG, HbAlc serum levels or the leukocyte count in GDM group. But in the control group there was no correlation between them. Conclusion：The results suggest that there is correlation between C-reactive protein and gestational diabetes mellitus, and inflammation may play an important role in the development of gestational diabetes mellitus.

关键词： C-reactive protein diabetes gestational inflammation

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烟片松散回潮关键工艺参数过程控制系统的优化设计

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中国烟草学报 2015年第3期21卷 34-42页

作者：李秀芳河南中烟黄金叶生产制造中心郑州经开区第三大街9号450016

为提高松散回潮工序的过程控制能力,降低关键指标波动。通过改善回风和含水率控制结构,优化工艺参数,使松散回潮出口烟片温度和含水率的波动减小,出口含水率平均标偏SD从0.43%降到0.24%,提高了系统运行的稳定性和过程控制的可靠性。

关键词：松散回潮过程控制优化过程能力指数

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Gelation behavior of Antheraea pernyi silk fibroin

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Science China Chemistry 2010年第3期53卷 535-541页

作者： YAN ShuQin,ZHAO ChunXia,WU xiufang,ZHANG Qiang & li MingZhong National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering,Soochow University,Suzhou 215123,China National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou China

The sol-gel transition behavior of Antherae pernyi silk fibroin(Ap-SF) has not been systematically *** this work,the influence of environmental temperature,pH,the concentration of Ap-SF,K+ and Ca2+ on the gelation time,and the structural changes of Ap-SF in sol-gel transformation were *** results indicated that the gelation time of the Ap-SF aqueous solution decreased with the increase of the Ap-SF concentration and environmental *** sol-gel transformation of Ap-SF was much more rapid than that of Bombyx mori silk fibroin under the same *** Ap-SF was sensitive to changes in the concentration of Ca2+ and K+.Upon gelation,the random coil structure of the Ap-SF was significantly transformed into the β-sheet structure.

关键词： Antheraea pernyi silk fibroin gelation sol-gel transition

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绿原酸分子印迹体系的计算模拟及复合膜的制备

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化学学报 2011年第6期69卷 693-700页

作者：李秀芳钟世安中南大学化学化工学院长沙410083

以绿原酸为模板分子,以丙烯酰胺(AM)、丙烯酸(AA)、4-乙烯基吡啶(4-VP)、2-乙烯基吡啶(2-VP)四种物质分别作为功能单体,使用密度泛函理论(DFT)方法和PM3半经验法,运用Gaussian 03软件模拟模板分子与不同功能单体的分子印迹聚合物预组装... 详细信息

以绿原酸为模板分子,以丙烯酰胺(AM)、丙烯酸(AA)、4-乙烯基吡啶(4-VP)、2-乙烯基吡啶(2-VP)四种物质分别作为功能单体,使用密度泛函理论(DFT)方法和PM3半经验法,运用Gaussian 03软件模拟模板分子与不同功能单体的分子印迹聚合物预组装体系的构型、能量及复合反应的结合能(ΔE),以讨论不同功能单体对分子印迹聚合物识别性能的影响,结果丙烯酰胺的印迹效应最好.以聚偏氟乙烯微孔滤膜为支撑膜,绿原酸为模板分子,AM,AA,4-VP,2-VP四种物质分别作为功能单体,用紫外光引发表面修饰聚合制备了绿原酸分子印迹复合膜,测量底物绿原酸在几种印迹膜上吸附量的大小,得出的实验结论和理论计算的结果相一致.Scatchard分析表明,在所研究的浓度范围内分子印迹复合膜中存在两类不同性能的吸附位点,结合位点的平衡离解常数Kd1和Kd2分别为0.151和0.480 mmol/L.底物(绿原酸)的结合和渗透选择性实验表明,分子印迹复合膜对绿原酸有较好的结合性能,结合量分别是14.934和28.123μmol/g.

关键词：分子印迹复合膜计算模拟 Scatchard分析渗透绿原酸

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