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9篇 您的检索式:作者名="Wang Guigen"
    题名 作者 年代 出处 被引量
1Effect of annealing temperature and annealing atmosphere on the structure and optical properties of ZnO thin films on sap- phire (0001) substrates by magnetron sputtering显示文摘Cui Lin Zhang Huayu Wang Guigen 2012Applied Surface Science2012,258,7:1
2Effect of ECR-assisted microwave plasma nitriding treatment on the microstructure characteristics of FCVA deposited ultra-thin ta-C films for high-density magnetic storage applications显示文摘Wang Guigen Zhang Huayu Zhou Hongfei 2010Appl Surf Sci2010,256,:1
3Multilayer 3D Chiral Folding Polymers and Their Asymmetric Catalytic Assembly显示文摘A novel class of polymers and oligomers of chiral folding chirality has been designed and synthesized,showing structurally compacted triple.column/multiple layer frameworks.Both uniformed and diferentiated aromatic chromophoric units were successfully constructed between naphthy!piers of this framework.Screening monomers,catalysts,and catalytic systems led 1o the success of asymmetric catalytic Suzuki-Miyaura polycouplings Enantio-and diastereochemistry were unambiguously determined by X-ray structural analysis and concurrently by comparison with a similar asymmetric induction by the same catalyst in the asymmetric synthesis of a chiral three layered product.The resuling chiral polymers exhibit intense fluorescence activity in a solid form and solution under speci fic wavelength irradiation.Yao Tang Shengzhou Jin Sai Zhang Guan-Zhao Wu Jia-Yin Wang Ting Xu Yu Wang Daniel Unruh Kazimierz Surowiec Yanzhang Ma Shiren Wang Courtney Katz Hongjun Liang Yunze Li Wellong Cong Guigen Li 2022Research2022,,2:0
4Orientational Chirality,Its Asymmetric Control,and Computational Study显示文摘Orientational chirality was discovered and characterized by a C(sp)-C(sp3)axis-anchored chiral center and a remotely anchored blocker.X-ray structural analysis proved that orientatiomers are stabilized by through-space functional groups,making it possible for 1 R-or S-chiral center to exhibit 3 orientational isomers simply by rotating operations.A new model system was proposed,fundamentally different from the traditional Felkin-Ahn-type or Cram-type models.In these traditional models,chiral C(sp^(3))center and blocking C(sp^(3))carbons are connected adjacently,and there exist 6 energy barriers during rotating along the C(sp^(2))-C(sp^(3))axis.In comparison,the present orientational chirality model shows that a chiral C(sp)-C(sp^(3))carbon is remotely located from a blocking group.Thus,it is focused on the steric dialog between a chiral C(sp^(3))center and a remotely anchored functional group.There exist 3 energy barriers for either(R)-or(S)-C(sp)-C(sp^(3))stereogenicity in the new model.Chiral amide auxiliary was proven to be an excellent chiral auxiliary in controlling rotations of orientatiomers to give complete stereoselectivity.The asymmetric synthesis of individual orientatiomers was conducted via multistep synthesis by taking advantage of the Suzuki-Miyaura cross-coupling and Sonogashira coupling reactions.Density functional theory computational study presented optimized conformers and relative energies for individual orientatiomers.This discovery would be anticipated to result in a new stereochemistry topic and have a broad impact on chemical,biomedical,and material sciences in the future.Shengzhou Jin Yu Wang Yao Tang Jia-Yin Wang Ting Xu Junyi Pan Sai Zhang Qiankai Yuan Anis Ur Rahman James D.McDonald Guo-Qiang Wang Shuhua Li Guigen Li 2023Research2023,,1:0
5Timing noise study of four pulsars显示文摘Analyzing up to ten years of pulsar timing data observed by the 25-m Nanshan telescope at Urumqi,China,we studied power spectra of timing residuals for four pulsars based on orthogonal polynomials.Our work reveals that an index of 4 is consistent with a power law model and reveals random walk noise in the rotating frequency.Stability with 8 is investigated and found to be consistent with previous results.A new method called the morphology filter is applied to denoise the pulsar timing residuals and to perform further spectrum analysis.The spectra obtained with this method are improved in accuracy compared with those from timing residuals of pulsars directly.ZHANG CaiHong WANG Na YUAN JianPing LIU ZhiYong LIU JingNan NIE GuiGen 2012Science China(Physics,Mechanics & Astronomy)2012,55,2:0
6Aggregation-Induced Synthesis (AIS): Asymmetric Synthesis via Chiral Aggregates显示文摘A new chiral aggregate-based tool for asymmetric synthesis has been developed by taking advantage of chiral aggregates of GAP(Group-Assisted Purification)reagents,N-phosphonyl imines.This tool was proven to be successful in the asymmetric GAP synthesis of functionalized 2,3-dihydrobenzofurans by reacting salicyl N-phosphonyl imines with dialkyl bromomalonates in various cosolvent systems.The chiral induction can be controlled by differentiating between two asymmetric directions simply by changing the ratios of cosolvents which are commonly adopted in AIE(aggregation-induced emission)systems.The formation of chiral aggregates was witnessed by a new analytical tool-aggregation-induced polarization(AIP).The present synthetic method will be broadly extended for general organic synthesis,particularly,for asymmetric synthesis and asymmetric catalysis in the future.Hossein Rouh Yao Tang Ting Xu Qingkai Yuan Sai Zhang Jia-Yin Wang Shengzhou Jin Yu Wang Junyi Pan Hannah LWood James D.McDonald Guigen Li 2022Research2022,,4:0
7Catalytic Enantioselective Construction of 6-4 Ring-Junction All-Carbon Stereocenters and Mechanistic Insights显示文摘Comprehensive Summary Developing reactions for the synthesis of 6-6-4 and 6-4 carbocyclic scaffolds with a chiral quaternary center at the bridgehead position is highly desired,considering the existence of such skeletons in natural products with biological activities and the potential of using these molecules for downstream studies in chemical biology and medicinal chemistry.Report here is accessing these target skeletons with high chemo-,regio-and enantio-selectivities through Pd(ll)/chiral N,N'-disulfonyl bisimidazoline(Bim)ligand-catalyzed asymmetric reaction of yne-allenones and arylboronic acids.Jia-Yin Wang Chen-Long Li Ting Xu Meng-Fan Li Wen-Juan Hao Shu-Jiang Tu Jianyi Wang Guigen Li Zhi-Xiang Yu Bo Jiang 2022Chinese Journal of Chemistry2022,40,15:0
8Highly efficient twin-field quantum key distribution with neural networks显示文摘Quantum key distribution(QKD)allows two legitimate parties,Alice and Bob,to share a series of random bits that are secured by the laws of quantum mechanics.As a remarkable theoretical progress towards longer distances.Jingyang LIU Qingqing JIANG Huajian DING Xiao MA Mingshuo SUN Jiaxin XU Chun-Hui ZHANG Shipeng XIE Jian LI Guigen ZENG Xingyu ZHOU Qin WANG 2023Science China(Information Sciences)2023,66,8:0
9Triple-Columned and Multiple-Layered 3D Polymers:Design,Synthesis,Aggregation-Induced Emission(AIE),and Computational Study显示文摘Conjugated polymers and oligomers have great potentials in various fields,especially in materials and biological sciences because of their intriguing electronic and optoelectronic properties.In recent years,the through-space conjugation system has emerged as a new assembled pattern of multidimensional polymers.Here,a novel series of structurally condensed multicolumn/multilayer 3D polymers and oligomers have been designed and synthesized through one-pot Suzuki polycondensation(SPC).The intramolecularly stacked arrangement of polymers can be supported by either X-ray structural analysis or computational analysis.In all cases,polymers were obtained with modest to good yields,as determined by GPC and 1 H-NMR.MALDI-TOF analysis has proven the speculation of the step-growth process of this polymerization.The computational study of ab initio and DFT calculations based on trimer and pentamer models gives details of the structures and the electronic transition.Experimental results of optical and AIE research confirmed by calculation indicates that the present work would facilitate the research and applications in materials.Guanzhao Wu Yangxue Liu Zhen Yang Liulei Ma Yao Tang Xianliang Zhao Hossein Rouh Qixuan Zheng Peng Zhou Jia-Yin Wang Farhan Siddique Sai Zhang Shengzhou Jin Daniel Unruh Adelia JAAquino Hans Lischka Kristin M.Hutchins Guigen Li 2021Research2021,,1:0
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