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CPL-active hybrid copper(Ⅰ) halides enabled by cation inclusion with chiral crown-ether

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Science China Chemistry 2024年第10期67卷 3283-3290页

作者： Peng Fan Li-Xuan Cai Xiao-fang duan Fan Yin Chen-Chen Li Zhong-Hua Deng Xiao-Zhen Li Qing-Fu Sun College of Chemistry and Materials Science Fujian Normal University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fujian College University of Chinese Academy of Sciences Strait Institute of Flexible Electronics (Future Technologies) Fujian Key Laboratory of Flexible ElectronicsFujian Normal University and Strait Laboratory of Flexible Electronics

Chiral hybrid metal halides with high photoluminescence quantum yield（PLQY） and superior dissymmetry factor(glum) are promising candidates for circularly polarized luminescence（CPL） emitting ***,it is a great challenge to achieve both high glumand large ***,we report a new supramolecular strategy to fabricate chiral hybrid Cu（Ⅰ）-halides with nearunity quantum yields and intense CPL *** dissymmetry factor can be dramatically modulated by tuning the hostguest *** to the chirality and variable conformations of the host-guest complexes,a series of chiral[G@LR/S]2Cu4I6have been *** incorporation of different cations within the chiral LR/Shosts leads to variations of packing modes along the c-axis and different extent of distortions in the[Cu4I6]*** them,[H3O@LR/S]+cations are stacked based on Van der Waals interactions and hierarchically self-assemble into a right/left-handed helix in[H3O@LR/S]2Cu4I6,which results in a high glumof-7×10-3and a large PLQY of 96.92%.Notably,[G@LR/S]2Cu4I6shows promising applications in single-component white light emitting diodes（WLEDs）,exhibiting a maximum dissymmetry factor of -1.2×*** effective host-guest complexation and oriented hierarchical self-assembly provide an effective strategy for the development of high-performance CPL materials.

关键词： host-guest interaction circularly polarized luminescence copper iodide cluster hierarchical self-assembly chirality

静电纺丝法制备高熵合金及其蔬果中重金属离子电化学传感应用

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食品科学 2024年第17期45卷 233-241页

作者：钱鑫杜明亮朱罕陆双龙段芳江南大学化学与材料工程学院江苏无锡214122 合成与生物胶体教育部重点实验室江苏无锡214122

采用静电纺丝结合高温石墨化技术,以静电纺丝碳纳米纤维(carbon nanofibers,CNFs)串联多金属,再通过高温石墨化技术成功在碳纳米纤维上原位合成了均一的高熵合金纳米颗粒(high-entropy alloy nanoparticles,HEA NPs)。基于FeCoNiCrCe/C... 详细信息

采用静电纺丝结合高温石墨化技术,以静电纺丝碳纳米纤维(carbon nanofibers,CNFs)串联多金属,再通过高温石墨化技术成功在碳纳米纤维上原位合成了均一的高熵合金纳米颗粒(high-entropy alloy nanoparticles,HEA NPs)。基于FeCoNiCrCe/CNFs构建的重金属离子电化学传感器能实现同时对3种重金属离子的灵敏检测。在pH 5的0.1 mol/L醋酸-醋酸钠缓冲液中,沉积电压和时间分别为-1.3 V和300 s条件下,本研究所构建的电化学传感器对Cd^(2+)、Pb^(2+)和Cu^(2+)的检测限分别为0.06、0.005μmol/L和0.005μmol/L(信噪比=3)。分析认为其优异的性能归因于特定的HEANPs提供了良好的导电性和催化活性,以及CNFs较高的比表面积暴露出更多活性位点,二者的协同作用有利于重金属离子的吸附和脱附,促进了重金属离子的氧化还原反应以及电荷转移。本研究所制备的FeCoNiCrCe/CNFs/GCE电化学传感器在蔬果中检测重金属离子领域具有一定应用前景。

关键词：重金属离子电化学传感高熵合金静电纺丝纳米纤维

Note on the Longest Paths in {K_(1,4),K_(1,4)+e}-free Graphs

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Acta Mathematica Sinica,English Series 2012年第12期28卷 2501-2506页

作者： fang duan Guo Ping WANG School of Mathematical Sciences Xinjiang Normal University

A graph G is {K1,4, K1,4 ＋ e}-free if G contains no induced subgraph isomorphic to K1,4 or KI,a ＋ e In this paper, we show that G has a path which is either hamiltonian or of length at least 25（G）＋ 2 if G is a c... 详细信息

关键词： {K1,4 Kl,4 + e}-free graph longest path hamiltonian path

法莫替丁辅助治疗对急性肠胃炎患者症状、胃肠道功能和炎症的影响

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四川生理科学杂志 2024年第4期46卷 779-781页

作者：段方方沈桂佳曹慧湖口县中医院江西湖口332500 九江学院附属医院江西九江332000 湖口县人民医院江西湖口332500

目的:研究法莫替丁辅助治疗对急性肠胃炎患者症状、胃肠道功能和炎症的影响。方法:选取2021年8月至2023年8月期间收治的急性肠胃炎患者60例,采用随机数字表法分为对照组和观察组(n=30)。对照组给予肌肉注射盐酸甲氧氯普胺10 mg,观察组... 详细信息

目的:研究法莫替丁辅助治疗对急性肠胃炎患者症状、胃肠道功能和炎症的影响。方法:选取2021年8月至2023年8月期间收治的急性肠胃炎患者60例,采用随机数字表法分为对照组和观察组(n=30)。对照组给予肌肉注射盐酸甲氧氯普胺10 mg,观察组在对照组基础上给予静脉滴注法莫替丁20 mg治疗,比较两组胃肠道功能及症状改善情况,治疗前及治疗3 d后应用酶联免疫吸附(Enzyme-linked immunosorbent assay,ELISA)法测定白细胞介素-6(Interleukin-6,IL-6)、超敏C-反应蛋白(High-sensitivity C-reactive protein,hs-CRP)水平,以个体生活质量评估量表(The Quality of Life Scale,QOL)、舒适度量表(General Comfort Questionnaire,GCQ)进行评分。结果:观察组腹痛、腹泻及呕吐改善时间均低于对照组(P<0.05);治疗后观察组血清IL-6、hs-CRP水平均低于对照组(P<0.05);观察组总有效率(96.67%)高于对照组(80.00%)(P<0.05);治疗后观察组QOL、GCQ评分均高于对照组(P<0.05)。结论:法莫替丁辅助治疗急性肠胃炎患者可以促进其临床症状及胃肠道功能恢复,降低炎症因子水平,提高临床疗效,有效改善生活质量并提高舒适度。

关键词：法莫替丁急性肠胃炎临床症状胃肠道功能炎症因子

Synthesis and Characterization of a Novel Functional Biodegradable Copolymer-Poly(lactic acid-4-hydroxyproline-polyethylene glycol)

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Chinese Chemical Letters 2006年第8期17卷 1125-1128页

作者： Jiu fang duan Yu Bin ZHENG Department of Polymer Science Dalian University of Technology Dalian 116012

A series of poly（lactic acid-4-hydroxyproline-polyethylene glycol）（PLA-Hpr-PEG） copolymers were synthesized by direct melt copolymerization of D,L-lactic acid and 4-hydroxyproline with different feed amount of polyethylene glycol （PEG） 0.1%, 0.5%, 1% and 5%, respectively. The properties of these copolymers were characterized by using IR spectroscopy, proton nuclear magnetic resonance （1H-NMR） spectroscopy, gel permeation chromatography （GPC）, X-ray diffraction and differential scaning calorimetry （DSC）. PLA-Hpr-PEG are amorphous copolymers. Copolymers showed increasing water uptake capacity with increasing PEG percentage in the feed, which result in an increasing degradable rate in phosphate buffer solution （pH 7.4） at 37℃.

关键词： Lactic acid 4-hydroxyproline polyethylene glycol.

高龄孕妇中胎儿染色体微缺失微重复综合征的产前诊断

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中华医学遗传学杂志 2024年第4期41卷 486-493页

作者：段芳吴琦嫦许亚松孙世宇纪艺珍孙丽厦门市妇幼保健院(厦门大学附属妇女儿童医院)产前诊断科厦门361000

目的探讨核型分析联合染色体微阵列分析(CMA)及拷贝数变异测序(CNV-seq)技术在高龄孕妇产前诊断中的应用价值,分析胎儿拷贝数变异(CNV)的类型及相关表型的不确定性给产前遗传咨询带来的挑战。方法回顾分析2017年1月至2020年12月在厦门... 详细信息

目的探讨核型分析联合染色体微阵列分析(CMA)及拷贝数变异测序(CNV-seq)技术在高龄孕妇产前诊断中的应用价值,分析胎儿拷贝数变异(CNV)的类型及相关表型的不确定性给产前遗传咨询带来的挑战。方法回顾分析2017年1月至2020年12月在厦门大学附属妇女儿童医院产前诊断中心接受介入性产前诊断的1841例高龄孕妇的羊水染色体核型分析和CMA/CNV-seq检测结果。结果核型分析有2份样本细胞培养未成功,但CMA/CNV-seq检出致病性变异。核型分析共发现221例胎儿存在染色体异常,CMA/CNV-seq检出其中187例异常,但有1例标记染色体检测未发现异常,23例平衡性染色体结构异常和10例低比例嵌合体未检出异常。在核型未见异常的孕妇中额外发现26例(26/1841,1.4%)致病性CNV,其中有13例(50.0%)为与神经认知障碍表型相关的重现性CNV,7例(26.92%)为22q11.21微缺失微重复。结论核型分析和CMA/CNV-seq技术的联合使用不仅能够提高产前诊断的检出率且具有互补性,可为临床遗传咨询及制定产前诊断策略提供参考依据。

关键词：拷贝数变异高龄产前诊断染色体微缺失微重复综合征

Synthesis of Visible-Light-Driven g-C3N4/PPy/Ag Ternary Photocatalyst with Improved Photocatalytic Performance

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Chinese Journal of Chemistry 2017年第2期35卷 226-236页

作者： Fengli Zhang fang duan Zhigang Ding Mingqing Chen School of Chemical and Material Engineering Jiangnan University Wuxi Jiangsu 214122 China The Key Laboratory of Food Colloids and Biotechnology Ministry of Education Jiangnan University Wuxi Jiangsu 214122 China

g-C3N4/PPy/Ag ternary photocatalyst was synthesized by a three-step method. Firstly, graphitic carbon nitride （g-C3N4） photocatalyst was obtained by sintering melamine at high temperature, then a series ofg-C3N4/PPy com- posite photocatalysts were prepared by in-situ polymerization of pyrrole, and finally the g-C3N4/PPy/Ag ternary composite photocatalyst was obtained by depositing Ag on the surface of g-C3N4/PPy. The photocatalytic activities of as-prepared samples were evaluated by degradation of antibiotic tetracycline （TC） under visible light. The influ- ence of the amounts of polypyrrole （PPy） and Ag on the photocatalytic activity of g-C3N4/PPy/Ag ternary photo- catalyst was investigated. Both PPy and Ag played critical roles for the enhanced photocatalytic activity of g-C3N4/PPy/Ag. The g-C3N4/PPy/Ag composites exhibited remarkably improved photocatalytic activities for de- grading TC compared with g-C3N4, g-C3N4/PPy and g-C3N4/Ag. Besides, the photocatalytic mechanism was also analyzed. The band match of PPy with g-C3N4 benefited the separation of photo-generated carriers in g-C3N4, and the deposited Ag nanoparticles played important roles as an electron mediator due to the surface plasmon resonance （SPR） effects. The present study offered new insight into the design of the economical and gently environ- ment-friendly synthesis of highly efficient photocatalysts.

关键词： g-C3N4 polypyrrole Ag visible light photocatalyst

Formation and thermal stability of amorphous Ni-Mo-P alloys

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中国有色金属学会会刊：英文版 2004年第z1期14卷 147-151页

作者： ZHANG Yi MA Jun fang Yong-kui duan Ji-guo School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090 China College of Chemistry and Chemical Engineering Daqing Petroleum Institute Daqing 163318 China College of Chemistry and Chemical Engineering Daqing Petroleum Institute Daqing 163318 China School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090 China School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090 China

The experimental researches on the chemical deposition of Ni-Mo-P amorphous alloys were carried out by adding Na2 MoO4 into acidic solutions. The optimum technology conditions were obtained by orthogonal design experiments. The structures and the relationship between compositions and their thermal stability were studied by energy spectrum (EC), scanning electron micrograph and X-ray diffraction spectrum. Compared with Ni-P amorphous alloys, the Ni-Mo-P amorphous alloys have high crystallization temperature and thermal stability, and the hardness reaches its peak when the annealing temperature is 500 ℃. With the increase of the heat treatment temperature, the surface morphology of the alloys changes.

关键词： chemical deposition Ni-Mo-P alloy amorphous phase crystallization

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改进分水岭算法的扫描电镜图像标定

实验室研究与探索 2024年第8期43卷 24-28页

作者：朱建鹏王英孙巍端方王贤浩杨明来上海交大-平湖智能光电研究院浙江平湖314299 上海应用技术大学轨道交通学院上海201418 上海交通大学先进电子材料与器件平台上海200240 卡尔蔡司(上海)管理有限公司上海200131

针对不同探测器模式下扫描电镜图像特征复杂且易受阴影干扰的问题,提出了基于改进分水岭算法的扫描电镜图像标定方法。首先,通过自适应滤波、梯度变换等预处理流程减少噪声影响,同时保留真实信息;然后,针对分水岭标记存在的阴影干扰问题... 详细信息

针对不同探测器模式下扫描电镜图像特征复杂且易受阴影干扰的问题,提出了基于改进分水岭算法的扫描电镜图像标定方法。首先,通过自适应滤波、梯度变换等预处理流程减少噪声影响,同时保留真实信息;然后,针对分水岭标记存在的阴影干扰问题,采用自适应改进方法,使得标记的获取更具普适性,可适用于不同的探测器模式。棋盘格样品测试结果表明,该方法在InLens和SE2探测器模式下表现良好,并在综合评价指标上明显优于其他标定方法。将标定结果按照参考标尺与人工测量数据进行对比,两者相对误差在7%以内。

关键词：分水岭变换扫描电镜微观分析图像处理