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Synthesis, Characterization, and Electrochemical Property of Nanometer Porphyrin Dimer

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Chemical Research in Chinese Universities 2008年第1期24卷 20-23页

作者： ZHENG Wen-qi SHAN Ning WANG Xing-qiao College of Chemistry Jilin University Changchun 130012 P. R. China Basic Sciences Department Jilin Architectural and Civil Engineering Institute Changchun 130021 P. R. China

A nanometer porphyrin dimer was synthesized with fumaryl chloride as a bridge-linked reagent. The characterization was carried out with elemental analyses, ^1H NMR, UV-Vis, and IR spectrometries, and then the electrochemical properties of the porphyrins were studied. The authors found that there was moderate electronic communication between the two porphyrin rings in the nanometer porphyrin dimer.

关键词： Nanometer porphyrin dimer Fumaryl chloride Electrochemical property

Reduction of 4-Nitrophenol Using Ficin Capped Gold Nanoclusters as Catalyst

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Chemical Research in Chinese Universities 2019年第4期35卷 636-640页

作者： WU Han CAI Huiwu qiao Juan qi Li School of Chemistry and Chemical Engineering Xi'an University of Science and Technology Xi'an 710054P.R.China Beijing National Laboratoty for Molecular Sciences Key Laboratory of Analytical Chemistry for Living BiosystemsInstitute of Chemistry Chinese Academy of SciencesBeijing 100190P.R.China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049P. R.China

Conversion of nitroarenes to aminoarenes has attracted great attention in pharmaceutical industry, agricultural production, environmental protection and chemical catalysis area. In this work, ficin capped gold nanoclusters(ficin@AuNCs) were prepared for the reduction of 4-nitrophenol to *** proposed catalyst was characterized by transmission electron microscopy,dynamic light scattering, fluorescence spectra and UV-Vis spectra. With NaBH4 as the reducing agent, the reduction reaction could carry out completely within 10 min at 25 ℃. Interestingly, the resultant catalyst exliibited size-related properties in the reduction, smaller ficin@AuNCs exhibited liigher catalytic activity. Its present pseudo-first-order rate constant was found to be 2.95×10^-3 s^-1 and the catalytic activation energy was 27.7 kJ/mol. Moreover, ficin@AuNCs-based catalyst displayed good stability, heading to 4-nitrophenol conversion of 98.5%-100.0% after six consecutive cycles. It has shown a great potential in construction of unique catalysts based on AuNCs for reduction reaction.

关键词： Ficin capped gold nanocluster 4-Nitrophenol 4-Aminophenol Catalytic activation

POLYMERIZATION AND CHARACTERIZATION OF HIGH CONDUCTIVITY AND GOOD ADHENSION POLYPYRROLE FILMS FOR ELECTROMAGNETIC INTERFERENCE SHIELDING

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Chinese Journal of Polymer Science 2010年第6期28卷 923-930页

作者： Yong-sheng qiao La-zhen Shen Tao Dou ming Hu Institute of Special Chemicals Taiyuan University of Technology Taiyuan 030024 China School of Chemistry and Chemical Engineering Shanxi Datong University Datong 037009 China School of Electronic Information Engineering Tianjin University Tianjin 300072 China

Polypyrrole（PPy） shows a favorable application in the electromagnetic interference（EMI） shielding due to its good electrical conductivity and outstanding air *** PPy films with high conductivity and good adhesion were successfully polymerized on the surface of insulating epoxy resin substrates using chemical *** factors affecting the properties of PPy films,such as the surface morphology,adhesion between PPy film and substrate,electrical conductivity,EMI shielding effectiveness（SE）,were *** adhesion was improved significantly through a three-step surface pretreatment of epoxy resin substrates including removing impurities,roughening,and surface modification with silane coupling *** enhancement in the conductivity of PPy films of about one order of magnitude was achieved by adding dopant in FeCl_3 *** higher the conductivity,the better the shielding *** sodium p-toluenesulfonate doped PPy film as example,EMI SE was in the practically useful range of about 30 dB over a wide frequency range from 30 MHz to 1500 *** PPy film samples were characterized by scanning electron microscopy （SEM）,infrared spectra（IR）,X-ray photoelectron spectroscopy（XPS） and the flange coaxial transmission *** fourpoint probe method was used to measure conductivity of PPy films.

关键词： Polypyrrole film EMI Conductivity Adhesion

Optimal extent of lymphadenectomy improves prognosis and guides adjuvant chemotherapy in esophageal cancer: A propensity scorematched analysis

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1537-1547页

作者： Ji-ming Tang Shu-Jie Huang qi-Bin Chen Han-Sheng Wu Gui-Bin qiao Department of Thoracic Surgery Guangdong Provincial People’s HospitalGuangzhou 510080Guangdong ProvinceChina Department of Thoracic Surgery The First Affiliated Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina

BACKGROUND The optimal extent of lymphadenectomy in esophageal squamous cell carcinoma(ESCC)patients remained *** To explore the ideal number of cleared lymph nodes in ESCC patients undergoing upfront *** In this retrospective,propensity score-matched study,we included 1042 ESCC patients who underwent esophagectomy from November 2008 and October *** who underwent neoadjuvant therapy were *** collected pa-tients’clinicopathological features and information regarding lymph nodes,in-cluding the total number of resected lymph nodes(NRLN),and pathologically diagnosed positive lymph nodes(RPLN).SPSS and R software were used for statistical *** Among the included 1042 patients,two cohorts:≤21(n=664)and>21 NRLN(n=378)were *** final prognostic model included four variables:T stage,N,venous thrombus,and the number of removed lymph *** them,NRLN>21 was determined as an independent prognosticator after surgery for esophageal cancer(hazards regression=0.66,95%confidence interval:0.50-0.87,P=0.004).A nomogram was created based on the regression coefficients of the variables in the final *** the training cohort,the predictive model dis-played an uncorrected five-year overall survival C-index of 0.659,with a bootstrap-corrected C-index of *** the subgroup analysis,adjuvant chemotherapy was beneficial in the subgroup with NRLN>21 and RPLN≤0.16 and NRLN≤21 and RPLN>*** NRLN>21 was an independent prognostic factor after ESCC *** combination of NRLN and RPLN may provide a reference for adjuvant chemotherapy use in potential beneficiaries.

关键词： Esophageal squamous cell carcinoma Lymphadenectomy Adjuvant chemotherapy Prognosis Nomogram

[Cd(Sn_(9))_(2)]^(6-) and[Cd(Ni@Sn_(9))_(2)]^(6-):Reactivity and coordination chemistry of empty and Ni-centered[Sn_(9)]^(4-) Zintl ions

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Chinese Chemical Letters 2023年第1期34卷 523-526页

作者： Ya-Nan Yang Lei qiao Zhong-ming Sun State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab of Rare Earth Materials and ApplicationsSchool of Material Science and EngineeringNankai UniversityTianjin 300350China

To investigate the reactivity of homoatomic clusters[E_(9)]^(4-)(E=Si-Pb)and intermetalloid clusters[M@E_(9)]^(q-),the reactions of the Zintl anions[Sn_(9)]^(4-) and[Ni@Sn_(9)]^(4-) with the CdMes_(2)(Mes=Mesitylene)in the presence of 2.2.2-crypt were carried *** new compounds[K(2.2.2-crypt)]_(6)[(Sn_(9))Cd(Sn_(9))]·en(1)and[K(2.2.2-crypt)]_(6)[(Ni@Sn_(9))Cd(Ni@Sn_(9))]·en(2)were *** 1 and 2 were characterized by single-crystal X-ray diffraction,energy dispersive X-ray(EDX),and electrospray ionization mass spectrometry(ESI-MS),and can be viewed as two[Sn_(9)]^(4-)or[Ni@Sn_(9)]^(4-)subunits bridged by Cd ion in an η^(3):η^(3) coordination *** chemical calculations reveal the relationships between the geometries and electronic structures of clusters 2a,[Ni_(3)Ge_(18)]^(4-)and[Cu_(4)@Sn_(18)]^(4-).Further electron localization technique(Ad NDP method)was performed to explain chemical bonding patterns of 1a.

关键词： Heterometallic complexes Sn cluster Zintl anions DFT calculation Electronic structure

Neurotrophin-3-mediated locomotor recovery: a novel therapeutic strategy targeting lumbar neural circuitry after spinal cord injury

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Neural Regeneration Research 2020年第12期15卷 2241-2242页

作者： qi Han Xiao-ming Xu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteDepartment of Neurological SurgeryIndiana University School of MedicineIndianapolisINUSA

Traumatic spinal cord injury(SCI)leads to chronic locomotor impairment and ***,there are no effective treatments currently available for SCI patients(Bradbury and Burnside,2019).Developing novel repair interventions to mitigate the devastating nature of SCI and translating them clinically are urgent medical needs to improve the quality of life of patients with *** lumbar spinal motoneurons(MNs)are the final common pathway for hindlimb locomotion since all neural activities that influence hindlimb movement converging upon these neurons.

关键词： lumbar neural injury

Joint DOA and polarization estimation for unequal power sources based on reconstructed noise subspace

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Journal of Systems Engineering and Electronics 2016年第3期27卷 501-513页

作者： Yong Han qingyuan Fang Fenggang Yan ming Jin Xiaolin qiao School of Electronics and Information Engineering Harbin Institute of Technology School of Information Science and Technology Shijiazhuang Tiedao University

In most literature about joint direction of arrival（DOA） and polarization estimation, the case that sources possess different power levels is seldom discussed. However, this case exists widely in practical applications, especially in passive radar systems. In this paper, we propose a joint DOA and polarization estimation method for unequal power sources based on the reconstructed noise subspace. The invariance property of noise subspace（IPNS） to power of sources has been proved an effective method to estimate DOA of unequal power sources. We develop the IPNS method for joint DOA and polarization estimation based on a dual polarized array. Moreover, we propose an improved IPNS method based on the reconstructed noise subspace, which has higher resolution probability than the IPNS method. It is theoretically proved that the IPNS to power of sources is still valid when the eigenvalues of the noise subspace are changed artificially. Simulation results show that the resolution probability of the proposed method is enhanced compared with the methods based on the IPNS and the polarimetric multiple signal classification（MUSIC） method. Meanwhile, the proposed method has approximately the same estimation accuracy as the IPNS method for the weak source.

关键词： invariance property of noise subspace(IPNS) joint DOA and polarization estimation multiple signal classification(MUSIC) reconstruction of noise subspace unequal power sources

Amorphous NiMo_(3)S_(13)/nickel foam integrated anode for lithium-ion batteries

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Tungsten 2024年第2期6卷 438-446页

作者： ming-Xin Shi Min Wu Shan-Shan Xiao Shan-Ping Liu Rui-qi Yao Ying-qi Li Yong-Hui Wang Yang-Guang Li Hua-qiao Tan Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of ChemistryNortheast Normal UniversityChangchun 130024China School of Materials Science and Engineering Jilin Jianzhu UniversityChangchun 130118China Institute Charles Gerhardt Montpellier Universite de MontpellierCentre National de la Recherche Scientifi quePlace E.Bataillon34095 Montpellier Cedex 05France

Although crystalline anode materials with long-range ordered lattice structure are in favor of facilitating the electron transfer,their structures are easily disrupted during long-term cycling due to the continuous embedding/de-embedding of lithium *** contrast,the amorphous materials have abundant defects and lithium ion storage sites,refl ecting a superior reaction kinetics and long-term cycling ***,we synthesize an integrated hybrid anode by in-situ loading amorphous NiMo_(3)S_(13)nanosheets on nickel foam *** ting from the introduction of Ni^(2+)that amorphizes the molybdenumsulfur clusters,the assembled lithium ion battery based on the integrated NiMo_(3)S_(13)/nickel foam anode delivers a specifi c capacity up to 1659 mA·h·g^(−1)at a current density of 0.6 A·g^(−1)and exhibits superior rate/cycling performance.

关键词： Molybdenum-sulfur clusters Amorphous Integrated anode Crystalline Lithium-ion batteries

Dynamic response of mountain tunnel,bridge,and embankment along the Sichuan-Tibet transportation corridor to active fault based on model tests

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Journal of Mountain Science 2024年第1期21卷 182-199页

作者： HUANG Beixiu qiao Sijia CHEN Xulei LI Lihui qi Shengwen Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Sichuan-Tibet transportation corridor is prone to numerous active faults and frequent strong *** extensive studies have individually explored the effect of active faults and strong earthquakes on different engineering structures,their combined effect remains *** research employed multiple physical model tests to investigate the dynamic response of various engineering structures,including tunnels,bridges,and embankments,under the simultaneous influence of cumulative earthquakes and stick-slip misalignment of an active *** prototype selected for this study was the Kanding No.2 tunnel,which crosses the Yunongxi fault zone within the Sichuan-Tibet transportation *** results demonstrated that the tunnel,bridge,and embankment exhibited amplification in response to the input seismic wave,with the amplification effect gradually decreasing as the input peak ground acceleration(PGA)*** PGAs of different engineering structures were weakened by the fault rupture ***,the misalignment of the active fault may decrease the overall stiffness of the engineering structure,leading to more severe damage,with a small contribution from seismic ***,the seismic vibration effect might be enlarged with the height of the engineering structure,and the tunnel is supposed to have a smaller PGA and lower dynamic earth pressure compared to bridges and embankments in strong earthquake zones crossing active *** findings contribute valuable insights for evaluating the dynamic response of various engineering structures crossing an active fault and provide an experimental reference for secure engineering design in the challenging conditions of the Sichuan-Tibet transportation corridor.

关键词： Dynamic response Engineering structure Sichuan-Tibet transportation corridor Active fault Earthquake Model test