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| 1 | Pore-Environment Engineering in Multifunctional Metal-Organic Frameworks显示文摘Contents 1.Introduction 5102.Direct Synthesis 5102.1.Functional modification of ligands 5102.2.Functional modification of secondary buildingunits(SBU)5112.3.Multivariate metal-organic frameworks(MTV-MOF)5123.Post-Synthesis Modification(PSM)5123.1.Post-synthetic metal exchange(PSME)5133.2.Post-synthetic ligand exchange(PSLE)5133.3.Post-synthetic elimination and insertion(PSE&I)5144.Building Block Replacement(BBR)5144.1.Solvent-assisted linker exchange(SALE)5144.2.Non-bridged ligand replacement 5154.3.Transmetalation at nodes or within linkers 5165.Pore Space Partition in MOF(PSP)5175.1.Cage-within-Cage MOFs 5175.2.One-dimensional channel segmentation 5186.Construction of Multi-mesoporous MOF 5186.1.Linker thermolysis 5186.2.Chemical shear 5197.Dynamic Septal Ligand Insertion 5198.Conclusions and Perspectives 5201.Introduction Metal-Organic Frameworks(MOFs)are organic-inorganic hy-brid crystalline materials with intramolecular pores formed byself-assembly of organic ligands and inorganic metal ions or clus-ters through coordination bonds.[1]Compared with traditionalinorganic porous materials,MOFs have flexible ligands and metalnodes,large specific surface area,adjustable pore size,and modi-fiable structure,which show great potential in gas storage,sepa-ration,catalysis and energy technology applications.[2]At thesame time,the clear and adjustable crystal structure provides anideal platform for the study of material structure-activity(struc-ture-performance)relationship,which makes MOFs have greatadvantages in structural research and practical applications. | Xiurong Zhang Xia Wang Weidong Fan Daofeng Sun | 2020 | Chinese Journal of Chemistry2020，38，5： | 11 |
| 2 | A novel function for the cellulose binding module of cellobiohydrolase I显示文摘A homogeneous cellulose-binding module(CBM)of cellobiohydrolase I(CBHI)from Trichoderma pseudokoningii S-38 was obtained by the limited proteolysis with papain and a series of chromatographs filtration.Analysis of FT-IR spectra demonstrated that the structural changes result from a weakening and splitting of the hydrogen bond network in cellulose by the action of CBMCBHI at 40℃for 24 h.The results of molecular dynamic simulations are consistent with the experimental conclusions, and provide a nanoscopic view of the mechanism that strong and medium H-bonds decreased dramatically when CBM was bound to the cellulose surface.The function of CBMCBHI is not only limited to locating intact CBHI in close proximity with cellulose fibrils,but also is involved in the structural disruption at the fibre surface.The present studies provided considerable evidence for the model of the intramolecular synergy between the catalytic domain and their CBMs. | WANG LuShan 1,2 ,ZHANG YuZhong 1 &GAO PeiJi 1 1State Key Laboratory of Microbial Technology,Shandong University,Jinan 250100,China 2Beijing Laboratory of Nanoscale Physics&Devices,Chinese Academy of Sciences,Beijing 100080,China | 2008 | Science China(Life Sciences)2008，51，7： | 10 |
| 3 | Reconstruction of broken Si–O–Si bonds in iron ore tailings (IOTs) in concrete显示文摘This paper reports a study on the reconstruction of broken Si O Si bonds in iron ore tailings (IOTs) in concrete. Limestone and IOTs were used to investigate the influence of different types of coarse aggregates on the compressive strengths of concrete samples. The dif- ferences in interfacial transition zones (ITZs) between aggregate and paste were analyzed by scanning electron microscopy (SEM) and ener- gy-dispersive spectroscopy (EDS). Meanwhile, X-ray diffraction (XRD) and infrared spectroscopy (IR) were used to study microscopic changes in limestone and IOTs powders in a simple alkaline environment that simulated cement. The results show that the compressive strengths of IOTs concrete or paste are higher than those of limestone concrete or paste under identical conditions. The Ca/Si atom ratios in the ITZs of IOTs con- crete samples are lower than those of limestone concrete;the diffraction peak of the calcium silicate phase at 2θ = 29.5°, as well as the bands of Si O bonds shifting to lower wavenumbers, indicates reconstruction of the broken Si-O-Si bonds on the surfaces of IOTs with Ca(OH)2. | Juan-hong Liu Yu-cheng Zhou Ai-xiang Wu Hong-jiang Wang | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，10： | 10 |
| 4 | Conductive,Stretchable,and Self-healing Ionic Gel Based on Dynamic Covalent Bonds and Electrostatic Interaction显示文摘Integrating multiple functions into one gel that can be widely applied to electronic devices as well as chemical and biomedical engineering remains a big challenge.Here,a multifunctional ionic liquid/dynamic covalent bonds (ionic/DCB) type gel was designed and synthesized via one-pot polymerization.With the assistance of electrostatic interaction provided by the imidazolium cations of IL and the reversible DCB of boronic ester,as-prepared ionic/DCB gel showed good stretchable properties and high ionic conductivity at ambient conditions.In addition,the electrostatic interaction between imidazolium cations and sulfonate anions and the reversible DCB led to enhanced chain mobility and thereby excellent self-healing properties.Particularly,sulfonate anions in ionic/DCB gel could alleviate the migration of electronegative polysulfide and promote the transportation of electropositive lithium ion in lithium-sulfur battery system.Therefore,this work provides a new insight to promote the current research on self-healing gels,hopefully expanding their applications in electronic devices. | Yi Sun Yong-Yuan Ren Qi Li Rong-Wei Shi Yin Hu Jiang-Na Guo Zhe Sun Feng Yan | 2019 | Chinese Journal of Polymer Science2019，37，11： | 9 |
| 5 | Synthesis of Chiral β-Lactams by Pd-Catalyzed Enantioselective Amidation of Methylene C(sp3)-H Bonds显示文摘A Pd(Ⅱ)-catalyzed enantioselective intramolecular amidation of both benzylic and unbiased methylene C(sp^3)-H bonds for the straightforward synthesis of chiral B-lactams from aliphatic carboxamides is reported.The combination of 2 prinylisopropyl(PIP)auxiiary with 3,3′-subtituted BINOL ligands is crucial for the enhancement of both reactivity and enantiocontrol of differentiating unbiased meth-ylene C(sp^3)-H bonds.The desired chemoselective C-N reductive elimination was achieved by employing 2-fluoro-1-iodo-4-nitrobenzene as oxidant. | Tao Zhou Meng-Xue Jiang Xu Yang Qiang Yue Ye-Qiang Han Yi Ding Bing-Feng Shi | 2020 | Chinese Journal of Chemistry2020，38，3： | 7 |
| 6 | 信用类债券的政府信用及违约承担机制研究显示文摘建立信用违约承担机制是转变政府一再为信用类债券违约兜底的前提,也是债券信用风险得以合理分散的根本途径。通过对中国信用债市场发展现状、发展原因和国家政策等方面的分析,揭示出信用债市场目前存在的突出问题:信用债以政府信用为主导、信用风险依然集聚在银行体系。针对以上问题提出解决方案,尝试建立以信用违约互换(CDS)为中心、专业评级机构、信息披露制度和信用债券合理定价为支撑的信用违约承担机制。 | 周梅 刘传哲 | 2013 | 经济问题2013，，12： | 6 |
| 7 | Phyto-phospholipid complexes(phytosomes): A novel strategy to improve the bioavailability of active constituents显示文摘Although active constituents extracted from plants show robust in vitro pharmacological effects, low in vivo absorption greatly limits the widespread application of these compounds. A strategy of using phyto-phospholipid complexes represents a promising approach to increase the oral bioavailability of active constituents, which is consist of ‘‘label-friendly'phospholipids and active constituents. Hydrogen bond interactions between active constituents and phospholipids enable phospholipid complexes as an integral part. This review provides an update on four important issues related to phyto-phospholipid complexes: active constituents, phospholipids, solvents, and stoichiometric ratios. We also discuss recent progress in research on the preparation, characterization, structural verification, and increased bioavailability of phyto-phospholipid complexes. | Mei Lu Qiujun Qiu Xiang Luo Xinrong Liu Jing Sun Cunyang Wang Xiangyun Lin Yihui Deng Yanzhi Song | 2019 | Asian Journal of Pharmaceutical Sciences2019，14，3： | 4 |
| 8 | Catalytic transfer hydrogenolysis as an efficient route in cleavage of lignin and model compounds显示文摘Cleavage of aromatic ether bonds through hydrogenolysis is one of the most promising routes for depolymerisation and transformation of lignin into value-added chemicals. Instead of using pressurized hydrogen gas as hydrogen source, some reductive organic molecules, such as methanol, ethanol, isopropanol as well as formates and formic acid, can serve as hydrogen donor is the process called catalytic transfer hydrogenolysis. This is an emerging and promising research field but there are very few reports. In this paper, a comprehensive review of the works is presented on catalytic transfer hydrogenolysis of lignin and lignin model compounds aiming to breakdown the aromatic ethers including a-O-4, b-O-4 and 4-O-5 linkages, with focus on reaction mechanisms. The works are organised regarding to different hydrogen donors used, to gain an in-depth understanding of the special role of various hydrogen donors in this process. Perspectives on current challenges and opportunities of future research to develop catalytic transfer hydrogenolysis as a competitive and unique strategy for lignin valorisation are also provided. | Jiaguang Zhang | 2018 | Green Energy & Environment2018，3，4： | 4 |
| 9 | Nematode-Encoded RALF Peptide Mimics Facilitate Parasitism of Plants through the FERONIA Receptor Kinase显示文摘The molecular mechanism by which plants defend against plant root-knot nematodes(RKNs)is largely unknown.The plant receptor kinase FERONIA and its peptide ligands,rapid alkalinization factors(RALFs),regulate plant immune responses and cell expansion,which are two important factors for successful RKN parasitism.In this study,we found that mutation of FERONIA in Arabidopsis thaliana resulted in plants showing low susceptibility to the RKN Meloidogyne incognita.To identify the underlying mechanisms associated with this phenomenon,we identified 18 novel RALF-likes from multiple species of RKNs and showed that two RALF-likes(i.e.,MiRALF1 and MiRALF3)from M.incognita were expressed in the esophageal gland with high expression during the parasitic stages of nematode development.These nematode RALF-likes also possess the typical activities of plant RALFs and can directly bind to the extracellular domain of FERONIA to modulate specific steps of nematode parasitism-related immune responses and cell expansion.Genetically,both MiRALF1/3 and FERONIA are required for RKN parasitism in Arabidopsis and rice.Collectively,our study suggests that nematode-encoded RALFs facilitate parasitism via plant-encoded FERONIA and provides a novel paradigm for studying host-pathogen interactions. | Xin Zhang Huan Peng Sirui Zhu Junjie Xing Xin Li Zhaozhong Zhu Jingyuan Zheng Long Wang Bingqian Wang Jia Chen Zhenhua Ming Ke Yao Jinzhuo Jian Sheng Luan Devin Coleman-Derr Hongdong Liao Yousong Peng Deliang Peng Feng Yu | 2020 | Molecular Plant2020，13，10： | 3 |
| 10 | Structure and property of metal melt Ⅰ:The number of residual bonds after solid-liquid phase changes显示文摘Based on the mechanism of metal solid-liquid phase change and the theory of liquid metal's micro-inhomogeneity,a physical model is established between latent heats of fusion and vaporization and the numbers of residual bonds and short-range ordered atoms at the melting point inside a metal melt.Meanwhile,the mathematical derivation and proof are also offered.This model produces the numbers of residual bonds and short-range ordered atoms after the solid-liquid phase change only by using basic parameters and thermophysical properties of the crystal structure.Therefore,it presents a more effective way to analyze the melt's structural information.By using this model,this study calculates the numbers of residual bonds and short-range ordered atoms in Al and Ni melts.The calculated results are consistent with the experimental results.Simultaneously,this study discusses the atomic number's influence on the numbers of residual bonds and short-range ordered atoms in the melts within the first(ⅠA) and second main group(ⅡA) elements. | MI GuangBao1,2,LI PeiJie1,2 & HE LiangJu1 1 National Center of Novel Materials for International Research,Tsinghua University,Beijing 100084,China 2 Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，9： | 3 |
| 11 | Encrypting Chemical Reactivity in Protein Sequences toward Information-Coded Reactions显示文摘Contents 1.Introduction 8652.Naturally Occurring Covalent Crosslinks in Proteins 8653.Genetically Encoded Protein Coupling Reactions 8664.Applications 8674.1.Topology engineering 8684.2.Protein bioconjugation 8694.3.Protein-based biomaterials 8714.4.Synthetic biology 8725.Inspiration from Nature:Information-Coded Chemical Reactions 8736.Conclusions and Perspectives 8741.Introduction Controlling chemical reactivity has been a central theme in chemistry.Conventional ways to manipulate reactivity include varying concentration and/or temperature,putting the bonds under tension,or changing the electronic states by neighboring substituents,etc.In the Information Age,one may wonder if information about chemical reactivity could be somehow encrypted in the chemical structure in a simple and straightforward way to allow for facile tailoring of reactivity toward intelligent design ofcompounds and reactions. | Fan Zhang Wen-Bin Zhang | 2020 | Chinese Journal of Chemistry2020，38，8： | 3 |
| 12 | A new method for quick predicting the strength of intermolecular hydrogen bonds显示文摘A new method is proposed to quick predict the strength of intermolecular hydrogen bonds.The method is employed to produce the hydrogen-bonding potential energy curves of twenty-nine hydro-gen-bonded dimers.The calculation results show that the hydrogen-bonding potential energy curves obtained from this method are in good agreement with those obtained from MP2/6-31+G calculations by including the BSSE correction,which demonstrate that the method proposed in this work can be used to calculate the hydrogen-bonding interactions in peptides. | SUN ChangLiang ZHANG Yan JIANG XiaoNan WANG ChangSheng YANG ZhongZhi | 2009 | Science China Chemistry2009，52，2： | 2 |
| 13 | Diffusive-stochastic-viscoelastic model on specific adhesion of viscoelastic solids via molecular bonds显示文摘A diffusive-stochastic-viscoelastic model is proposed for the specific adhesion of viscoelastic solids via stochastically formed molecular bonds. In this model, we assumed that molecular level behaviours, including the diffusion of mobile adhesion molecules and stochastic reaction between adhesion molecules and binding sites, obey the Markovian stochastic processes, while mesoscopic deformations of the viscoelastic media are governed by continuum mechanics. Through Monte Carlo simulations of this model, we systematically investigated how the competition between time scales of molecular diffusion, reaction, and deformation creep of the solids may influence the lifetime and dynamic strength of the adhesion. We revealed that there exists an optimal characteristic time of molecule diffusion corresponding to the longest lifetime and largest adhesion strength, which is in good agreement with experimental observed characteristic time scales of molecular diffusion in cell membranes. In addition, we identified that the media viscosity can significantly increase the lifetime and dynamic strength, since the deformation creep and stress relaxation can effectively reduce the concentration of interfacial stress and increases the rebinding probability of molecular bonds. | Kuncheng He Long Li Jizeng Wang | 2019 | Acta Mechanica Sinica2019，35，2： | 2 |
| 14 | Wheat gluten protein and its impacts on wheat processing quality显示文摘Before the advent of the wheat genomic era, a wide range of studies were conducted to understand the chemistry and functions of the wheat storage proteins,which are the major determinants of wheat flour the suitability of wheat flour for various end products, such as bread, noodles and cakes.Wheat grain protein is divided into gluten and non-gluten fractions and the wheat processing quality mainly depends on the gluten fractions.Gluten provides the unique extensibility and elasticity of dough that are essential for various wheat end products.Disulfide bonds are formed between cysteine residues,which is the chemical bases for the physical properties of dough.Based on the SDS-extractability, grain protein is divided into SDS-unextractable polymeric protein(UPP)and SDS-extractable polymeric protein.The percentage of UPP is positively related to the formation of disulfide bonds in the dough matrix.In the wheat genomic era, new glutenins with long repetitive central domains that contain a high number of consensus hexapeptide and nonapeptide motifs as well as high content of cysteine and glutamine residues should be targeted. | Wujun MA Zitong YU Maoyun SHE Yun ZHAO Shahidul ISLAM | 2019 | Frontiers of Agricultural Science and Engineering2019，6，3： | 2 |
| 15 | Unveiling the Effects of Interchain Hydrogen Bonds on Solution Gelation and Mechanical Properties of Diarylfluorene-Based Semiconductor Polymers显示文摘The intrinsically rigid and limited strain of most conjugated polymers has encouraged us to optimize the extensible properties of conjugated polymers.Herein,learning from the hydrogen bonds in glucose,which were facilitated to the toughness enhancement of cellulose,we introduced interchain hydrogen bonds to polydiarylfluorene by amide-containing side chains.Through tuning the copolymerization ratio,we systematically investigated their influence on the hierarchical condensed structures,rheology behavior,tensile performances,and optoelectronic properties of conjugated polymers.Compared to the reference copolymers with a low ratio of amide units,copolymers with 30%and 40%amide units present a feature of the shearthinning process that resembled the non-Newtonian fluid,which was enabled by the interchain dynamic hydrogen bonds.Besides,we developed a practical and universal method for measuring the intrinsic mechanical properties of conjugated polymers.We demonstrated the significant impact of hydrogen bonds in solution gelation,material crystallization,and thin film stretchability.Impressively,the breaking elongation for P4 was even up to~30%,which confirmed the partially enhanced film ductility and toughness due to the increased amide groups.Furthermore,polymer light-emitting devices(PLEDs)based on these copolymers presented comparable performances and stable electroluminescence(EL).Thin films of these copolymers also exhibited random laser emission with the threshold as low as 0.52μJ/cm^(2),suggesting the wide prospective application in the field of flexible optoelectronic devices. | Lubing Bai Yamin Han Chen Sun Xiang An Chuanxin Wei Wei Liu Man Xu Lili Sun Ning Sun Mengna Yu He Zhang Qi Wei Chunxiang Xu Yingguo Yang Tianshi Qin Linghai Xie Jinyi Lin Wei Huang | 2020 | Research2020，，1： | 2 |
| 16 | Ab initio study of lithochlorosilylenoid H_2SiLiCl显示文摘The structures of lithochlorosilylenoid H2SiLiCl have been studied by RHF/STO-3G gradientmethod. Four equilibrium states and three isomerization transition states are located. The calcula-tion shows that the structure with three-membered ring is the most stable one and the stability of theequilibrium structures is in the order of three-membered ring>p-complex>σ-complex >tetrahedron.The dipole moments, Mülliken populations, frontier molecular orbitals and peculiarities of variousstructures are also given and analyzed. | FENG, Sheng-Yu* JU, Guan-Zhi DENG, Cong-Hao, Theoretical Chemistry Group, Shandong University, Jinan 250100 | 1991 | Chinese Journal of Chemistry1991，9，5： | 2 |
| 17 | A temperature responsive adhesive hydrogel for fabrication of flexible electronic sensors显示文摘Flexible electronics are playing an increasingly important role in human health monitoring and healthcare diagnosis.Strong adhesion on human tissue would be ideal for reducing interface resistance and motion artifacts,but arising problems such as skin irritation,rubefaction,and pain upon device removal have hampered their utility.Here,inspired by the temperature reversibility of hydrogen bonding,a skin-friendly conductive hydrogel with multiple-hydrogen bonds was designed by using biocompatible poly(vinyl alcohol)(PVA),phytic acid(PA),and gelatin(Gel).The obtained PVA/PA/Gel(PPG)hydrogel with temperature-triggered tunable mechanic could reliably adhere to skin and detect electrophysiological signals under a hot compress while be readily removed under a cool compress.Furthermore,the additional advantages of transparency,breathability,and antimicrobial activity of the PPG hydrogel ensure its long-time wearable value on the skin.It is both environmentally friendly and cost saving for the waste PPG hydrogel during production can be recycled based on their reversible physical bonding.The PPG hydrogel sensor is expected to have good application prospects to record electrophysiological signals in human health monitoring. | Wan Liu Ruijie Xie Jingyu Zhu Jiansheng Wu Junfeng Hui Xiaoyan Zheng Fengwei Huo Daidi Fan | 2022 | npj Flexible Electronics2022，6，1： | 2 |
| 18 | Theoretical study on tetranuclear boron clusters: B4X4 (X = H, F, Cl, Br, I)显示文摘The molecular orbitals for B4H4, B4F4, B4Cl4, B4Br4 and B4I4 have been calculated by using all-electron or effective core potential ab initio method at the self-consistent field level using basis sets with diffuse and polarization functions. The boron-boron and boron-halide (-hydrogen) distances of these cage compounds are optimized with three kinds of basis sets constrained to a tetrahedral symmetry. According to the localization scheme of Boys, four three-centered two-electron (3c2e) B-B-B bonds localized on each of the faces of the B4 tetrahedron are derived for B4X4 clusters. The HOMO-LUMO energy gaps, atomization energies and Mulliken overlap populations of these compounds indicate that the stabilities of the clusters decrease in the sequence of B4F4 > B4Cl4, B4H4 > B4Br4 > B4I4. | LIN, Chen-Sheng LI, Jun LIU, Chun-WanFujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, China | 1994 | Chinese Journal of Chemistry1994，12，4： | 2 |
| 19 | Theoretical studies on the binding energy of β-sheet models显示文摘In this paper,B3LYP and MP2 methods are used to investigate the binding energy of seventeen antiparallel and parallel β-sheet models. The results indicate that the binding energy obtained from B3LYP calculations is weaker than that obtained from MP2 calculations but the relative binding energy yielded by B3LYP is almost the same as that by MP2. For the antiparallel β-sheets in which two N―H···O═C hydrogen bonds can form either a large hydrogen-bonded ring or a small hydrogen-bonded ring,the binding energy increases obviously when one large ring unit is added,whereas it only changes slightly when one small ring unit is added because of the secondary electrostatic repulsive interaction existing in the small ring unit which is estimated to be about 20 kJ/mol. For the parallel β-sheet models,the binding energy increases almost exactly linearly with the increase of the chain length. | SUN ChangLiang WANG ChangSheng | 2009 | Science China Chemistry2009，52，12： | 2 |
| 20 | Radical cascade reactions of unsaturated C–C bonds involving migration显示文摘During the past few years, with the rapid development of mild methods for the generation of radical species, great progress in radical cascade reactions of unsaturated C–C bonds has been made. Many radical cascade reactions involve functional groups migration, which leads structurally much more diverse, complex and valuable compounds not easily obtained through other methods. In this review, the recent achievements in unsaturated C–C bonds radical cascade reactions involving migration are summarized. | Ge Zhang Yang Liu Jinbo Zhao Yan Li Qian Zhang | 2019 | Science China Chemistry2019，62，11： | 2 |
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