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Alkylsulfonium salts for the photochemical desulphurizative functionalization of heteroarenes

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Organic Chemistry Frontiers 2022年第2期9卷 347-355页

作者： xiaolong zhu Min Jiang Xuan Li Enjie zhu Qirong Deng Xiuyan Song Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China College of Materials Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou310036P.R.China

The development of new versatile alkylation reagents that can be transformed from diverse available chemical raw materials is highly desirable.Here,an efficient,metal-free organic photoredox-catalyzed direct alkylation of heteroarenes via a desulphurization strategy using alkylsulfonium salts as alkylation reagents under mild conditions has been described for the first time.The inexpensive and efficient organic photoredox-catalyzed method offers a new and useful strategy for constructing various biologically interesting heteroarenes in the fields of synthetic and pharmaceutical chemistry,and extends the scope of the still limited sulfonium salt photochemistry.

关键词： salts alkylation sulfo

A desulphurization strategy for Sonogashira couplings by visible light/copper catalysis

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Organic Chemistry Frontiers 2022年第2期9卷 386-393页

作者： Xuan Li Min Jiang xiaolong zhu Xiuyan Song Qirong Deng Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China College of Materials Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou310036P.R.China

The development of new copper-based catalysts in photoredox transformations has become a rapidly growing area of research and has been actively explored in the past several years.Herein,we have developed a new copper-based catalyst,[(binap)(tpy)Cu]Cl,and applied it in the visible-light promoted Sonogashira coupling reactions.This mild protocol results in various substituted alkynes from simple sulfonium salts which can be easily prepared from commercially available and inexpensive thiols,alcohols,and alkyl halides.This study will broaden the still limited strategies of copper photocatalysts in organic transformations.

关键词： copper visible coupling

A versatile 3D-printable hydrogel for antichondrosarcoma,antibacterial,and tissue repair

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Journal of Materials Science & Technology 2023年第5期136卷 200-211页

作者： Wenxiang zhu Zheng Zhou Yuting Huang Hairong Liu Ning He xiaolong zhu Xiaoxiao Han Dengming Zhou Xuanchu Duan Xin Chen Yahui He Xiaolin Meng Shuai zhu College of Materials Science and Engineering Hunan UniversityChangsha 410082China College of Biology Hunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacture for Vehicle Body Hunan UniversityChangsha 410082China Department of Ophthalmology The Second Xiangya HospitalCentral South UniversityChangsha 410011China Aier Glaucoma Institute Changsha 410000China Aier School of Ophthalmology Central South UniversityChangsha 410000China Changsha Aier Eye Hospital Aier Eye Hospital GroupChangsha 410000China

Following operative treatment of chondrosarcoma,post-surgery tissue reconstruction may be confronted with daunting challenges,including the delayed self-repair of defective tissue,tumor recurrence,and bac-terial infection.To overcome these challenges,a methacrylic anhydride(MA)modified sericin(SerMA)solution mixed with procyanidins(PC)loaded polydopamine(PDA)modified ZIF-8(PC@ZIF-8@PDA)nanoparticles to form a multifunctional PC@ZIF-8@PDA/SerMA hydrogel after exposure under blue light.Hydrogel products with pre-designed shapes were printed out by using the SerMA solution carrying PC@ZIF-8@PDA nanoparticles and chondrocytes,indicating that PC@ZIF-8@PDA/SerMA hydrogels with personalized shapes can be fabricated via 3D printing.Photocrosslinked PC@ZIF-8@PDA/SerMA hydrogel is able to kill chondrosarcoma cells and bacteria,like Staphylococcus aureus(S.aureus),and Escherichia coli(E.coli),by its photothermal activity combined with near-infrared radiation(NIR).The PC@ZIF-8@PDA/SerMA hydrogel exhibited an antioxidative activity and a good biocompatibility and was easily monitored by its florescent and photoacoustic properties.Rabbit articular cartilage defects were efficiently repaired by PC@ZIF-8@PDA/SerMA hydrogels with encapsulated corresponding autologous chondrocytes,and mice skin burning wounds were swiftly regenerated by applying this hydrogel.Hence,the PC@ZIF-8@PDA/SerMA hydrogel can be potentially applied to the clinic treatment of chondrosarcoma and tissue defect repair after chondrosarcoma resection due to its multifunction in the future.

关键词： Hydrogel Sericin ZIF-8 Chondrosarcoma Cartilage repair

Design and evaluation of a novel biopsy needle with hemostatic function

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机械工程前沿:英文版 2023年第2期18卷 319-331页

作者： xiaolong zhu Yichi MA Xiao XIAO Liang LU Wei XIAO Ziqi ZHAO Hongliang REN Max Q.-H.MENG Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Mechanical Engineering University of CaliforniaBerkeleyBerkeleyCA 48072USA Department of Electronic Engineering The Chinese University of Hong KongHong KongChina

Biopsy is a method commonly used for early cancer diagnosis.However,bleeding complications of widely available biopsy are risky for patients.Safer biopsy will result in a more accurate cancer diagnosis and a decrease in the risk of complications.In this article,we propose a novel biopsy needle that can reduce bleeding during biopsy procedures and achieve stable hemostasis.The proposed biopsy needle features a compact structure and can be operated easily by left and right hands.A predictive model for puncture force and tip deflection based on coupled Eulerian–Lagrangian(CEL)method is developed.Experimental results show that the biopsy needle can smoothly deliver the gelatin sponge hemostatic plug into the tissue.Although the hemostatic plug bends,the overall delivery process is stable,and the hemostatic plug retains in the tissue without being affected by the withdrawal of the needle.Further experiments indicate that the specimens are well obtained and evenly distributed in the groove of the outer needle without scattering.Our proposed design of biopsy needle possesses strong ability of hemostasis,tissue cutting,and tissue retention.The CEL model accurately predicts the peak of puncture force and produces close estimation of the insertion force at the postpuncture stage and tip position.

关键词： cancer diagnosis biopsy needle hemostatic function predictive model coupled Eulerian−Lagrangian

Double interface regulation: Toward highly stable lithium metal anode with high utilization

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InfoMat 2022年第7期4卷 147-159页

作者： Guanyao Wang Ming zhu Ying Zhang Chan Song xiaolong zhu Zhongyi Huang Yuanjun Zhang Fangfang Yu Gang Xu Minghong Wu Hua-Kun Liu Shi-Xue Dou Chao Wu School of Environmental and Chemical Engineering Shanghai UniversityShanghaiChina Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongWollongongNew South WalesAustralia School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjingJiangsuChina Key Laboratory of Organic Compound Pollution Control Engineering(MOE) Shanghai UniversityShanghaiChina

The undesirable Li dendrite growth and other knock-on issues have signifi-cantly plagued the application of Li metal anodes(LMAs).Herein,we report that the synergistic regulation of double interfaces adjacent to the metallic Li anode can effectively prevent the dendritic Li growth,significantly improving the cycling performance of LMAs under harsh conditions including high cur-rent density and high depth of discharge.Thorough comparison of electrolytes demonstrated that 1 M lithium bis(fluorosulfonyl)imide(LiFSI)in 1,2-dimethoxyethane(DME)can yield a robust and lithiophobic LiF-rich upper interface(solid electrolyte interphase).Besides,the Sb-based buffer layer forms a lithiophilic lower interface on current collector.The synergy of the upper and lower interfacial engineering plays an important role for outstanding cyclability of LMAs.Consequently,the plating/stripping of Li can be stably repeated for 835 and 329 cycles with an average Coulombic efficiency(CE)above 99%at 1 and 3 mA h cm?2,respectively.Surprisingly,the Li||Li symmetric cell can even withstand the baptism of current density up to 20 mA cm?2.The excellent performance validates that the facile synergistic regulating of interfaces adjacent to the metallic Li anode provides an effective pathway to stabilize LMAs.

关键词： dendrite suppression electrolytes lithium metal anodes nucleation buffer layer solid electrolyte interphase

Optimal design of near-Earth asteroid sample-return trajectories in the Sun–Earth–Moon system

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Acta Mechanica Sinica 2016年第4期32卷 753-770页

作者： Shengmao He Zhengfan zhu Chao Peng Jian Ma xiaolong zhu Yang Gao Key Laboratory of Space Utilization Technology and Engineering Center for Space UtilizationChinese Academyof SciencesBeijing 100094China University of Chinese Academy of Sciences Beijing 100049China Academy of Opto-Electronics Chinese Academy of SciencesBeijing 100094China

In the 6th edition of the Chinese Space Trajectory Design Competition held in 2014, a near-Earth asteroid sample-return trajectory design problem was released, in which the motion of the spacecraft is modeled in multi-body dynamics, considering the gravitational forces of the Sun, Earth, and Moon. It is proposed that an electric-propulsion spacecraft initially parking in a circular 200-kin-altitude low Earth orbit is expected to rendezvous with an asteroid and carry as much sample as possible back to the Earth in a 10-year time frame. The team from the Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences has reported a solution with an asteroid sample mass of 328 tons, which is ranked first in the competition. In this article, we will present our design and optimization methods, primarily including overall analysis, target selection, escape from and capture by the Earth-Moon system, and optimization of impulsive and low-thrust trajectories that are modeled in multi-body dynamics. The orbital resonance concept and lunar gravity assists are considered key techniques employed for trajectory design. The reported solution, preliminarily revealing the feasibility of returning a hundreds-of-tons asteroid or asteroid sample, envisions future space missions relating to near-Earth asteroid exploration.

关键词： Near-Earth asteroid. Sample-return trajectory.Space trajectory design competition Orbital resonance Lunar gravity assist

Oxidative dual C-H sulfenylation:A strategy for the synthesis of bis(imidazo[1,2-a]pyridin-3-yl)sulfanes under metal-free conditions using sulfur powder

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Chinese Chemical Letters 2021年第5期32卷 1705-1708页

作者： Ziyu Gan xiaolong zhu Qiuli Yan Xiuyan Song Daoshan Yang School of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEState Key Laboratory Base of Eco-Chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China

An efficient approach to sulfur-bridged imidazopyridines has been developed under metal-free conditions using inexpensive sulfur powder as the sulfur source.Most appealingly,the reaction can proceed smoothly without addition of any additives,ultimately decreasing the production of chemical waste.The inexpensive and green method should provide a useful strategy for constructing a library of novel and biological interesting heteroaromatic sulfides.

关键词： C-S bond Metal-free Sulfur powder Disulfides Heterocycle

A Mechanically Tunable Plasmonic Structure Composed of a Monolayer Array of Metal-Capped Colloidal Spheres on an Elastomeric Substrate

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Nano Research 2010年第11期3卷 807-812页

作者： xiaolong zhu Lei Shi Xiaohan Liu Jian Zi Zhenlin Wang Department of Physics Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education)and State Key Laboratory of Surface PhysicsFudan UniversityShanghai 200433China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China

A highly stretchable plasmonic structure composed of a monolayer array of metal-capped colloidal spheres on an elastomeric substrate has been fabricated using simple and inexpensive self-assembly and transfer-printing techniques.This composite structure supports coupled surface plasmons whose wavelengths are sensitive to the arrangement of the metal-capped colloidal spheres.Upon stretching,the lattice of metal-capped colloidal spheres will be deformed,leading to a large wavelength shift of surface plasmon resonances and simultaneously an obvious color change.This stretchable plasmonic structure offers a promising approach to tune surface plasmon resonances and might be exploited in realizing flexible plasmonic devices with tunability of mechanical strain.

关键词： Plasmonic structure metal-capped colloidal spheres elastomeric substrate tunable surface plasmon resonance

Graphene-plasmon polaritons： From fundamental properties to potential applications

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Frontiers of physics 2016年第2期11卷 31-43页

作者： Sanshui Xiao xiaolong zhu Bo-Hong Li N. Asger Mortensen Department of Photonics Engineering Technical University of Denmark DK-2800 Kgs. Lyngby Denmark Center for Nanostructured Graphene Technical University of Denmark DK-2800 Kgs. Lyngby Denmark Department of Micro and Nanotechnology Technical University of Denmark DK-2800 Kgs. Lyngby Denmark

With unique possibilities for controlling light in nanoscale devices, graphene plasmonics has opened new perspectives to the nanophotonics community with potential applications in metamaterials, modulators, photodetectors, and sensors. In this paper, we briefly review the recent exciting progress in graphene plasmonics. We begin with a general description of the optical properties of graphene, particularly focusing on the dispersion of graphene-plasmon polaritons. The dispersion relation of graphene-plasmon polaritons of spatially extended graphene is expressed in terms of the local re- sponse limit with an intraband contribution.／~Vith this theoretical foundation of graphene-plasmon polaritons, we then discuss recent exciting progress, paying specific attention to the following top- ics： excitation of graphene plasmon polaritons, electron-phonon interactions in graphene on polar substrates, and tunable graphene plasmonics with applications in modulators and sensors. Finally, we address some of the apparent challenges and promising perspectives of graphene plasmonics.

关键词： graphene plasmonics graphene-plasmon polariton plasmon-phonon interaction,tunability