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Nucleic Acid-Backboned Chimeric Polymers with Designable Physics and Chemistry

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Chinese Journal of Chemistry 2023年第8期41卷 951-957页

作者： Jiangming Wang Yuanchen Dong huajie liu Dongsheng liu School of Chemical Science and Engineering Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education and Shanghai Research Institute for Intelligent Autonomous SystemsTongji UniversityShanghai200092 China CAS Key Laboratory of Colloid Interface and Chemical ThermodynamicsBeijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190 China Engineering Research Center of Advanced Rare Earth Materials(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing100084 China

Comprehensive Summary The chain effect of polymer is the kernel of the precise synthesis of complex polymer compounds and the development of polymer *** acids,a special type of polyester,can form supramolecular polymers via hydrogen bonds among corresponding *** focused on the precise control of polymer chains and proposed the concept of“nucleic acid-backboned chimeric polymers”(NCPs).There are three important elements of NCPs,namely nucleic acid backbone,side group and intra-/inter-chain weak *** this review,we expound how to realize the construction of intelligent DNA structures through the regulation of these three elements and the applications of NCPs in various fields.

关键词： Chimeric polymers Programmable polymers Kinetically interlocking Self-assembly DNA

Construction of pH-Triggered DNA Hydrogels Based on Hybridization Chain Reactions

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Chemical Research in Chinese Universities 2020年第2期36卷 243-246页

作者： LI Yujie CHEN Jie DONG Yuanchen liu huajie liu Dongsheng Key Laboratory of Organic Optoelectronics&Molecular Engineering Ministry of EducationDepartment of ChemistryTsinghua UniversityBeijing 100084P.R.China School of Chemical Science and Engineering Shanghai Research Institute for Intelligent Autonomous SystemsKey Laboratory of Advanced Civil Engineering MaterialsMinistry of EducationTongji UniversityShanghai 200092P.R.China Division of Physical Biology CAS Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800P.R.China CAS Key Laboratory of Colloid Interface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190P.R.China

As a novel type of bio-functional material,DNA hydrogels have attracted more and more attention due to their successful applications in 3D cell culturing and tissue engineering for the designable and programmable ***,we have developed a pH-triggered DNA hydrogel based on a clamped hybridization chain reaction(C-HCR).In this system,a DNA switch was designed,which can release the initiator strand in a controllable way via the formation of the C-G-C4 triplex under the pH *** the pre-gelation solution is stable in neutral environment,the C-HCR will trigger the sol-gel transition as the pH decreased to *** strategy has endowed the DNA hydrogel with good controllability for triggering,which also shows potential in intellectual responsiveness to certain stimuli.

关键词： DNA hydrogel pH-Triggered Hybridization chain reaction Sol-gel phase transition

DNA-based supramolecular hydrogels:From construction strategies to biomedical applications

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Chinese Chemical Letters 2023年第12期34卷 76-86页

作者： Ping Chen Chenhong Yu Jie Chen Lijin Xu huajie liu jiangsu Engineering Laboratory for Environmental Functional Materials Jiangsu Key Lab for Chemistry of Low-Dimensional MaterialsSchool of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian 223300China School of Chemical Science and Engineering Shanghai Research Institute for Intelligent Autonomous SystemsKey Laboratory of Advanced Civil Engineering Materials of Ministry of EducationTongji UniversityShanghai 200092China Department of Chemistry Renmin University of ChinaBeijing 100872China

DNA-based supramolecular hydrogels are important and promising biomaterials for various applications due to their inherent biocompatibility and tunable physicochemical *** three-dimensional supramolecular matrix of DNA formed by non-covalently dynamic cross-linking provides exceptional adaptability,self-healing,injectable and responsive properties for *** addition,DNA hydrogels are also ideal bio-scaffold materials owing to their tissue-like mechanics and intrinsic biological ***,DNA can assemble into supramolecular networks by pure complementary base pairing;it can also be combined with other building blocks to construct hybrid *** review focuses on the development and construction strategies of DNA *** and synthesis methods,diverse responsiveness and biomedical applications are ***,the challenges and prospects of DNA-based supramolecular hydrogels are discussed.

关键词： DNA hydrogels Supramolecular hydrogels Self-assembly DNA nanotechnology Biomedical applications

An Experimental Study on the Reinforcement of Weakly-Consolidated Shallow Formation in Deep Water Using an Epoxy Resin-Based Fluid

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Fluid Dynamics & Materials Processing 2023年第5期19卷 1215-1226页

作者： Leiju Tian Yuhuan Bu huajie liu Lingyun Zhao School of Petroleum Engineering China University of Petroleum(East China)Qingdao266555China Key Laboratory of Unconventional Natural Gas Evaluation and Development in Complex Tectonic Areas Ministry of Natural ResourcesGuiyang550000China Guizhou Engineering Research Institute of Oil&Gas Exploration and Development Guiyang550000China

The mechanical properties of Portland cement differ from the weakly consolidated shallow formation in deep *** results in undesired abrupt changes in the compressive strength and elastic modulus at the cement–formation *** this study,a water-borne epoxy resin was applied as a strengthening material to reinforce the weakly consolidated shallow formation and protect the cement sheath from potential *** mechanical properties of the unconsolidated clay were tested,including their changes with increases in the temperature and curing *** addition,the effects of the seawater,cement slurry alkaline filtrate,and saltwater drilling fluid were *** confirmed by the results,the strengthening fluid was excellent at reinforcing the unconsolidated clay,with a compressive strength of 2.49 MPa(after curing for 7 days),even at a dosage of 5%.A cement slurry filtrate with a high pH was suitable to produce the required strengthening of the formation,especially its early age *** should also be pointed out that the used fluid exhibited good compatibility with the saltwater drilling fluid and seawater behaved well as a diluent for the strengthening fluid.

关键词： Manuscript compressive strength deepwater oil and gas well well cementing epoxy resin weakly consolidated shallow formation

Carbon Dots as“On–Off–On”Fluorescence Sensors for Selective and Consecutive Detection of 4-Nitrophenol and Cerium(IV)in Water Samples

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Journal of Analysis and Testing 2024年第2期8卷 201-209页

作者： Jing Yang Hao liu Yan Huang Li Li huajie liu Yaping Ding Department of Chemistry College of SciencesShanghai UniversityShanghai200444China School of Chemical Science and Engineering Tongji UniversityShanghai200092China

An“on–off–on”fluorescence sensor was designed for rapidly and consecutively detecting 4-nitrophenol and cerium(IV)without the use of any labeling *** yellow carbon dots were synthesized by a simple one-step hydrothermal approach,and various techniques were applied to investigate the morphology,structure,and optical properties of the carbon *** the optimal experimental conditions,4-nitrophenol rapidly quenched the fluorescence of carbon dots as a result of the inner filter eff ect(IFE).The fluorescence intensity of carbon dots was linear with the concentration of 4-nitrophenol(1–150μmol/L)and the limit of detection was 0.32μmol/*** fluorescence was gradually recovered as the cerium(IV)concentration(0.5–100μmol/L)increased in CDs/4-NP,and the limit of detection was 0.16μmol/*** sensor showed good selectivity and demonstrated high accuracy for the analysis of 4-nitrophenol and cerium(IV)in actual water samples.

关键词： Carbon dots Fluorescence sensor 4-Nitrophenol Cerium(IV) Water samples

Photocatalytic degradation of carbofuran in TiO_2 aqueous solution: Kinetics using design of experiments and mechanism by HPLC/MS/MS

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Journal of Environmental Sciences 2013年第8期25卷 1680-1686页

作者： Hai Yang Shuolin Zhou huajie liu Weiwei Yan Liping Yang Bing Yi College of Chemistry and Chemical Engineering Hunan Institute of Engineering College of Chemistry and Chemical Engineering Hunan Normal University South China Institute of Environmental Sciences Ministry of Environmental Protection

The photocatalytic degradation kinetics of carbofuran was optimized by central composite design based on response surface methodology for the first time. Three variables, TiO2 concentration, initial pH value and the concentration of carbofuran, were selected to determine the dependence of degradation efficiencies on independent variables. Response surface methodology modeling results indicated that the degradation efficiency of carbofuran was highly affected by the initial pH value and the concentration of carbofuran. Then nine degradation intermediates were detected by HPLC/MS/MS. The Frontier Electron Densities of carbofuran were calculated to predict the active sites on carbofuran attacked by hydroxyl radicals and photoholes. Point charges were used to elucidate the chemisorption pattern on TiO2 catalysts during the photocatalytic process. By combining the experimental results and calculation data, the photocatalytic degradation pathways of carbofuran were proposed, including the addition of hydroxyl radicals and the cleavage of the carbamate side chain.

关键词： carbofuran photocatalytic degradation central composite design kinetics mechanism

Self-assembly of DNA Origami Using Rolling Circle Amplification Based DNA Nanoribbons

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Chinese Journal of Chemistry 2014年第2期32卷 137-141页

作者： Bing liu Xiangyuan Ouyang Jie Chao huajie liu Yun Zhao Chunhai Fan College of Life Science Sichuan UniversityChengduSichuan 610064China Laboratory of Physical Biology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

During the development of structural DNA nanotechnology,the emerging of scaffolded DNA origami is *** utilizes DNA double helix inherent specificity of Watson-Crick base pairing and structural features to create self-assembling structures at the nanometer scale exhibiting the addressable ***,the assembly of DNA origami is disorderly and ***,we present a novel strategy to assemble the DNA origami using rolling circle amplification based DNA nanoribbons as the ***,long single-stranded DNA from Rolling Circle Amplification is annealed with several staples to form kinds of DNA nanoribbons with ***,the rectangle origami is formed with overhanged staple strands at any edge that would hybridize with the DNA *** mixing them up,we illustrate the one-dimensional even two-dimensional assembly of DNA origami with good orientation.

关键词： self-assembly DNA origami rolling circle amplification nanoribbons

Programmed self-assembly of DNA origami nanoblocks into anisotropic higher-order nanopatterns

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Chinese Science Bulletin 2013年第21期58卷 2646-2650页

作者： FU YanMing CHAO Jie liu huajie FAN ChunHai Laboratory of Physical Biology Shanghai Institute of Applied Physics Chinese Academy of Sciences

Anisotropic nanopatterns have potentials in constructing novel plasmonic structures which have various applications in such as super-resolution microscopy, medicine, and sensors. However, it remains challenging to build big anisotropic nanopatterns that are suitable for big noble metal nanoparticles. Herein, we report a simple and reliable strategy for constructing DNA origami-based big anisotropic nanopatterns with controlled size and shape, nanoscale resolution, and fully addressability. Two kinds of basic DNA origami nanoblocks-cross-shaped and rectangular DNA origami units were used. We have demonstrated that by encoding nanoblocks' edges, anisotropic higher-order nanopatterns, such as dimer, trimer, tetramer and mini "windmill" like pentamer nanopatterns could be constructed. To show the potential use as template to direct the assembly of anisotropic nanoparticles arrays, a proof of concept work was conducted by anchoring streptavidin nanoparticles on the "windmill" template to form a chiral array. Significantly, these nanopatterns have the sizes of hundreds of nanometers, which are in principle also suitable for big noble metal nanoparticles arrays.

关键词：大各向异性体结构 DNA 折纸高阶金属纳米粒子自组装程序化

Assessment of the Performances of Carboxylic Acid Monomers as Fluid Loss Additives for Oil-Well Cement

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Fluid Dynamics & Materials Processing 2022年第4期18卷 999-1013页

作者： Hexing liu Yi Huang Jinlong Zheng Ye Tian Mengran Xu huajie liu Zhanjiang Branch of CNOOC(China)Co. Ltd.Zhanjiang524057China School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China

The application of polycarboxylic acid as a fluid loss additive for cement(i.e.,a substance specifically designed to lower the volume of filtrate that passes through the cement)can prolong the thickening time of cement *** the lack of data about the effects of carboxylic acid monomers as possible components for the additives traditionally used for oil-well cement,in this study different cases are experimentally investigated considering different types of these substances,concentrations,temperatures,and magnesium ion *** results demonstrate that itaconic acid has a strong retarding side effect,while maleic and acrylic acids have similar influences on the thickening time of the cement *** rheological properties of the cement slurry tend to deteriorate when the carboxylic acid monomer content in the fluid loss additive is increased to 40%.If the temperature exceeds 80°C,there is a significant decrease in the related impact on the thickening *** an increase in the intrusion of magnesium ions to>0.5%,both the rheological properties of the cement slurry and the thickening time are affected in a negative way.

关键词： Fluid-loss control additive cement slurry carboxylic acid monomer thickening performance