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An Overview of Self-Assembly and Morphological Regulation of Amphiphilic DNA Organic Hybrids

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Chinese Journal of Chemistry 2015年第5期33卷 511-516页

作者： fen wu Yiyang Zhang Zhongqiang Yang Key Laboratory of Organic Optoelectronics&Molecular Engineering of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China

In this review,we summarized the assembly behavior of DNA organic hybrids and listed reported strategies of tuning the morphology of *** self-assembly and morphological regulation of DNA organic hybrids provide an effective way to construct functional nanostructures with potential applications in nanomaterials,drug delivery and tissue *** future directions are discussed.

关键词： DNA amphiphiles self-assembly morphology regulation

Palladium-catalyzed multi components oxy-aminofluorination and aminofluorination of gem-difluoroalkenes

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Chinese Chemical Letters 2024年第2期35卷 420-425页

作者： fen wu Xin Li Junbiao Chang Dachang Bai State Key Laboratory of Antiviral Drugs NMPA Key Laboratory for Research and Evaluation of Innovative DrugKey Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringPingyuan LaboratoryHenan Normal UniversityXinxiang 453007China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Organofluorine compounds are widely used in the realm of drug discovery and material ***,we developed palladium catalyzed intermolecular aminofluorination and oxy-aminofluorination of gem‑difluoroalkenes with N-fluorobenzenesulfonimide(NFSI),in which NFSI was used as the nitrogen source and *** reaction provides an efficient and straightforward synthesis route of a series ofα-trifluoromethyl benzylic ***,three/four components oxy-aminofluorination processes were realized to giveα-trifluoromethyl benzylic ether with a terminal amino group,which proceed through C(sp^(3))-O bond cleavage of easily available ether and simultaneous introduced a fluorine,an amino and an oxy substituent in one pot with excellent *** divergent reactivity not only included the incorporation of one ether molecular,but also much more challenged two ether insertion with excellent selectivity through succession C(sp^(3))-O bonds *** protocol allows for concise synthesis of high value amines with fluoroalkyl-substituents and selectively transformation of easily available ethers by high-valent palladium catalysis.

关键词： Palladium Multi components Aminofluorination Oxy-aminofluorination C(sp^(3))-O bond cleavage

Fault Estimation for a Class of Markov Jump Piecewise-Affine Systems: Current Feedback Based Iterative Learning Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 418-429页

作者： Yanzheng Zhu Nuo Xu fen wu Xinkai Chen Donghua Zhou IEEE College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China College of Mechanical Engineering and Automation Huaqiao UniversityXiamen 361021China Department of Mechanical and Aerospace Engineering North Carolina State UniversityRaleigh NC 27695 USA Department of Electronic and Information Systems Shibaura Institute of TechnologySaitama 337-8570Japan

In this paper, the issues of stochastic stability analysis and fault estimation are investigated for a class of continuoustime Markov jump piecewise-affine(PWA) systems against actuator and sensor faults. Firstly, a novel mode-dependent PWA iterative learning observer with current feedback is designed to estimate the system states and faults, simultaneously, which contains both the previous iteration information and the current feedback mechanism. The auxiliary feedback channel optimizes the response speed of the observer, therefore the estimation error would converge to zero rapidly. Then, sufficient conditions for stochastic stability with guaranteed performance are demonstrated for the estimation error system, and the equivalence relations between the system information and the estimated information can be established via iterative accumulating ***, two illustrative examples containing a class of tunnel diode circuit systems are presented to fully demonstrate the effectiveness and superiority of the proposed iterative learning observer with current feedback.

关键词： Current feedback fault estimation iterative learning observer Markov jump piecewise-affine system

Effects of spin-coating speed on the morphology and photovoltaic performance of the diketopyrrolopyrrole-based terpolymer

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Science China Chemistry 2016年第4期59卷 466-471页

作者： fen wu Rongyan Hou Liang Yang Bin Zhao Songting Tan Key Laboratory of Environmentally Friendly Chemistry and Applications Ministry of Education College of Chemistry Xiangtan University Key Laboratory of Polymeric Materials & Application Technology of Hunan Province Xiangtan University

Polymer solar cells(PSCs) were fabricated by combining a diketopyrrolopyrrole-based terpolymer(PTBT-HTID-DPP) as the electron donor, and [6,6]-phenyl C_(61) butyric acid methyl ester(PC_(61)BM) as the electron acceptor, and the power conversion efficiency(PCE) of 4.31% has been achieved under AM 1.5 G(100 m W cm^(-2)) illumination condition via optimizing the polymer/PC_(61)BM ratio, the variety of solvent and the spin-coating speed. The impact of the spin-coating speed on the photovoltaic performance of the PSCs has been investigated by revealing the effects of the spin-coating speed on the morphology and the absorption spectra of the polymer/PC_(61)BM blend films. When the thickness of the blend films are adjusted by spin-coating a fixed concentration with different spin-coating speeds, the blend film prepared at a lower spin-coating speed shows a stronger absorption per unit thickness, and the correspond device shows higher IPCE value in the longer-wavelength region. Under the conditions of similar thickness, the blend film prepared at a lower spin-coating speed forms a more uniform microphase separation and smaller domain size which leads to a higher absorption intensity per unit thickness of the blend film in long wavenumber band, a larger short-circuit current density(J_(sc)) and a higher power conversion efficiency(PCE) of the PSC device. Noteworthily, it was found that spin-coating speed is not only a way to control the thickness of active layer but also an influencing factor on morphology and photovoltaic performance for the diketopyrrolopyrrole-based terpolymer.

关键词： polymer solar cells device optimization spin-coating speed morphology absorption per unit thickness

SHARP ESTIMATES OF QUASI-CONVEX MAPPINGS OF TYPE B AND ORDER α

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Acta Mathematica Scientia 2019年第5期39卷 1265-1276页

作者： Mingsheng LIU fen wu Yan YANG School of Mathematical Sciences South China Normal University Guangzhou 510631 China School of Mathematics(Zhuhai) Sun Yat-Sen University Zhuhai 519080 China

In this paper,we first establish several sharp inequalities of homogeneous expansion for biholomorphic quasi-convex mappings of type B and order a on the unit ball E in a complex Banach space X by applying the method and technique of complex ***,as the application of these sharp inequalities,we derive the sharp estimate of third homogeneous expansions for the above mappings defined on the unit polydisk U^n in C^n.

关键词： quasi-convex mappings of type B and order α inequalities of homogeneous expansions the sharp estimate of third homogeneous expansions

Necessary and Sufficient Conditions for the Controllability of Chain-shape Networks 36

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Necessary and Sufficient Conditions for the Controllability ...

Electrospray ionization tandem mass spectrometric studies to probe the interaction of Cu(II) with amoxicillin

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作者： Yuqing Hao Zhisheng Duan fen wu State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of EngineeringPeking University Department of Mechanical and Aerospace Engineering North Carolina State University

ISBN: (纸本)9781538629185

This paper focuses on the controllability of chain-shape networks,where the nodes are multi-input/multi-output（MIMO） linear time-invariant（LTI） systems with higher-dimensional *** necessary and sufficient conditions for the controllability of undirected and directed chain networks are established,*** conditions are easier to verify,which explicitly show the effects of the node-system dynamics,external control inputs and inner interactions on the controllability of the whole networked ***,some necessary conditions are further derived,which are more straightforward and *** effectiveness of the conditions is demonstrated through several examples.

关键词： networked system controllability observability MIMO LTI system chain-shape network

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Chinese Chemical Letters 2014年第1期25卷 39-45页

作者： Ramaiyan Sekar Suresh Kumar Kailasa Yuan-Chin Chen Hui-fen wu Department of Chemistry National Sun Yat Sen UniversityKaohsiung804 Depatment of Chemistry S. V. National Institute of TechnologySurat395007India Department of Chemistry Tamkang UniversityNew Taipei School of Pharmacy College of PharmacyKaohsiung Medical UniversityKaohsiung806 Doctoral Degree Program in Marine Biotechnology National Sun Yat-Sen UniversityKaohsiung804 Center for Nanoscience and Nonotechnoloty National Sun Yat-Sen University

This study describes the application of electrospray ionization mass spectrometry （ESI-MS） to investigate copper ion interaction with amoxicillin. ESI mass spectra of Cu-amoxicillin complexes show complex ions at m/z 828, 792, 753, 731,428, 388 and 366 corresponding to [63Cu＋（2A-H）＋2H2O]＋, [63Cu＋（2A-H）]＋, [2A＋Na]＋, [2A＋H]＊, [63Cu＋（A-H）]~, [A＋Na]~ and [A＋H]＋（where A = amoxicillin）. Based on the observed m/z values of Cu-amoxicillin complex ions, it is found that the Cu-amoxicillin ratios are 1：1 and 1：2, and the copper ions exhibited three feasible coordination numbers （2, 4 and 6） with arnoxicillin complexes. The structures and coordination numbers of copper-arnoxicillin complex ions were probed from their collisionally activated dissociation （CAD） spectra. Based on these results, it is confirmed that the copper ions could form stable tetrahedral and octahedral complexes with amoxicillin. This study validates the annlicabilitv of ESI-MS for nrobin; CODDer-amoxicillin comDlex ions.

关键词： Amoxicillin Copper ion ESI-MS

Asymmetric Synthesis of Anisodine

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Chinese Chemical Letters 2005年第10期16卷 1287-1289页

作者： Yan fen wu Wen LUE Qiang LU Wen Sheng ZHANG School of Pharmaceutical Sciences Peking University Beijing 100083

Anisodine was synthesized from 3α-hydroxy-6β-acetyltropine in 11 steps. Laevorotary isomer of anisodine was prepared from the asymmetric dihydroxylation of compound 10 via the osmium catalyzed process employing p-ch... 详细信息

关键词： Anisodine tropine alkaloid total synthesis.

Rapid separation of acetophenone and its monohydroxy isomers by capillary electrophoresis

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Chinese Chemical Letters 2013年第9期24卷 833-836页

作者： Ramaiyan Sekar Suresh Kumar Kailasa Wen-Shan Li Han-Chung wu Hui-fen wu Department of Chemistry National Sun Yat-Sen University Depatment of Applied Chemistry S.V. National Institute of Technology Doctoral Degree Program in Marine Biotechnology National Sun Yat-Sen University Institute of Chemistry Academia Sinica Institute of Cellular and Organismic Biology Academia Sinica Center of Nanoscience and Nanotechnology National Sun Yat-Sen University School of Pharmacy College of Pharmacy Kaohsiung Medical University

This work describes the development of a capillary electrophoresis （CE） method for the simultaneous separation of acetophenone （AP）, 2-hydroxyacetophenone （2-HAP）, 3-hydroxyacetophenone （3-HAP） and 4-hydroxyacetophenone （4-HAP） in synthetic mixtures using 10 mmol/L of sodium tetraborate buffer （pH 9.5）. The aim of this work is to demonstrate the effectiveness of CE to separate AP and its monohydroxy isomers and to define how the separations are affected by buffers, buffer pH, sample matrices and separation voltage. This method was successfully used for the trace level separation and determination of 2-HAP, 3-HAP and 4-HAP in synthetic mixture and 4-HAP in spiked plasma samples.

关键词： Capillary electrophoresis Electrokinetic injection Acetophenone isomers Plasma