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Block Sequence Effects on the Self-Assembly Behaviors of Polypeptide-Based Penta-Block Copolymer Hydrogels

ACS Applied materials and Interfaces 2024年第5期16卷 6674-6686页

作者： Wang, Ke-Hsin Liu, Chung-Hao Tan, Dun-Heng Nieh, Mu-Ping Su, Wei-Fang Department of Materials Science and Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Polymer program Institute of Materials Science University of Connecticut 25 King Hill Road Unit 3136 StorrsCT06269-3136 United States Department of Chemical and Biomolecular Engineering University of Connecticut StorrsCT06269 United States Department of Materials Engineering Ming-Chi University of Technology 84 Gungjuan Rd. New Taipei City243303 Taiwan

Peptide-based hydrogels have great potential for applications in tissue engineering, drug delivery, and so on. We systematically synthesize, characterize, and investigate the self-assembly behaviors of a series of polypeptide-based penta-block copolymers by varying block sequences and lengths. The copolymers contain hydrophobic blocks of poly(γ-benzyl-l-glutamate) (PBG, Bx) and two kinds of hydrophilic blocks, poly(l-lysine) (PLL, Ky) and poly(ethylene glycol) (PEG, EG34), where x and y are the number of repeating units of each block, where PBG and PLL blocks have unique functions for nerve regeneration and cell adhesion. It shows that a sufficient length of the middle hydrophilic segment capped with hydrophobic end PBG blocks is required. They first self-assemble into flower-like micelles and sequentially form transparent hydrogels (as low as 2.3 wt %) with increased polymer concentration. The hydrogels contain a microscale porous structure, a desired property for tissue engineering to facilitate the access of nutrient flow for cell growth and drug delivery systems with high efficiency of drug storage. We hypothesize that the structure of Bx-Ky-EG34-Ky-Bx agglomerates is beyond micron size (transparent), while that of Ky-Bx-EG34-Bx-Ky is on the submicron scale (opaque). We establish a working strategy to synthesize a polypeptide-based block copolymer with a wide window of sol-gel transition. The study offers insight into rational polypeptide hydrogel design with specific morphology, exploring the novel materials as potential candidates for neural tissue engineering. © 2024 The Authors. Published by American chemical Society

关键词： Block copolymers

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Specific Ion Effects on the Enzymatic Degradation of Polyester Films

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Chinese Journal of Polymer science 2023年第4期41卷 476-482,I0005页

作者： Jian Zhang Jie Zhu Zan Hua Guang-Ming Liu Department of Chemical Physics Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesUniversity of Science and Technology of ChinaHefei230026China Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province College of Material and Textile EngineeringJiaxing UniversityJiaxing314001China Biomass Molecular Engineering Center and Department of Materials Science and Engineering School of Forestry and Landscape ArchitectureAnhui Agricultural UniversityHefei230036China

Soil environment on earth contains a variety of ions,which are expected to play a vital role in the biodegradation of plastics discarded in the *** this work,poly(butyleneadipate-co-terephthalate)(PBAT)is employed as a model biodegradable plastic to study the specific ion effects on the enzymatic degradation of polyester *** results show that the specific ion effects on the enzymatic degradation rate of the PBAT films and on the catalytic rate constant for the enzymatic hydrolysis of the ester bonds are strongly dependent on temperature and ionic *** the enzymatic degradation rate and catalytic rate constant decrease following the trends Na^(+)>K^(+)>Ca^(2+)and Cl^(-)>SO_(4)^(2-)>NO_(3)^(-)for cations and anions,respectively,indicating that the ion-specific enzymatic degradation of the PBAT films is closely correlated with the specific ion effects on enzymatic hydrolysis of the ester *** study shows that the specific ion effects on the enzyme activity can be understood by taking into account the ion-specific cation-anion interaction,ionic dispersion force,salting-out effect and salting-in *** study of specific ion effects on the enzymatic hydrolysis of the ester bonds and the resultant enzymatic degradation of the PBAT films would offer us a new clue to develop new biodegradable,environmentally friendly synthetic plastics.

关键词： Specific ion effects Biodegradable films Ion-enzyme interactions Enzyme activity

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Two-dimensional perovskite Pb_(2)Nb_(3)O_(10) photodetectors

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Journal of materials science & Technology 2023年第33期164卷 95-101页

作者： Yong Zhang Jian Yao Zhen Zhang Rong Zhang Li Li Yu Teng Zongjie Shen Lixing Kang Limin Wu Xiaosheng Fang School of Electronic and Information Engineering Changshu Institute of TechnologyChangshu 215500China Division of Advanced Materials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Department of Materials Science State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200433China College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China

For the first time,we report high-performance two-dimensional(2D)perovskite Pb_(2)Nb_(3)O_(10) photodetectors(PNO PDs).The few-layer PNO nanosheets are obtained successfully through a simple calcination and liquid exfoliation *** individual PNO nanosheet devices with various structures(Au-PNO-Au,Au-PNO-Ti,Ti-PNO-Ti)are fabricated and *** Au-PNO-Ti device exhibits a high rectification factor(∼102)owing to a large Schottky barrier difference between the PNO nanosheet and two asymmetric ***,the Au-PNO-Ti device shows excellent self-powered performance,including high responsivity(2.8 A/W),high detectivity(1.1×10^(12) Jones),and fast speed(0.2/1.2 ms)at 350 nm light *** work not only suggests the performance of the PNO nanosheet PDs but also sheds light on the development of high-stability and high-performance devices based on 2D perovskite niobate in the future.

关键词： Pb2Nb3O10 Photodetectors Self-powered Two-dimensional Perovskite

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How High Does the Pressure Need to Be to Produce Internoble-Gas Ionic Compounds?

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CCS Chemistry 2025年第5期7卷 1359-1368页

作者： Zhongyu Wan Cheng-wei Ju Tianyi Yang Wenjun Xu Bo Li Ruiqin Zhang Xiao Cheng Zeng Department of Physics City University of Hong KongHong Kong SAR 999077 Pritzker School of Molecular Engineering The University of ChicagoChicagoIllinois 60637 Division of Chemistry and Chemical Engineering California Institute of TechnologyPasadenaCalifornia 91125 Department of Materials Science and Engineering City University of Hong KongHong Kong SAR 999077

Noble gases(NGs)are widely distributed in the universe with billions-year long lifetimes due to their closed-shell electronic structures with little chemical *** studies have found that most NGs can form covalent or ionic compounds with openshell neutral atoms(e.g.,O,Fe,and Ni)in conditions similar to planetary ***,there are still rare reports of chemical bonding among NG elements *** date,NG solids with only weak intermolecular interactions have been ***,we present the first theoretical evidence of the formation of inter-NG ionic compounds beyond terapascal(TPa)*** performed ab-initio computations combined with crystal-structure predictions and showed that Kr and Xe can act as oxidant and reductant,respectively,above 1.5 ***,the conventional octet rule for chemical compounds is inapplicable here due to the abnormal charge transfer upon ionic bond *** work not only addresses a fundamental chemistry question about how high the pressure needs to be for NG elements to form chemical compounds,but it also predicts the intriguing superconductivity of the inter-NG *** required extreme environment for the formation of inter-NG ionic compounds can be found in gas giants,like the planets Jupiter and Saturn,if ultrahigh pressure(>1.5 TPa)is available near the core region.

关键词： high pressure physics and chemistry chemical reactivity noble gases ionic bond gas giant superconductivity first-principles computation

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A low-cost and environmentally-friendly chitosan/spent coffee grounds composite with high photothermal properties for interfacial water evaporation

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Journal of Industrial and engineering Chemistry 2023年 126卷 283-291页

作者： Hsieh, Po-Cheng Chen, Yi-Chun Zheng, Nai-Ci Mangindaan, Dave Chien, Hsiu-Wen Department of Chemical and Materials Engineering National Kaohsiung University of Science and Technology Kaohsiung80778 Taiwan Department of Forestry National Chung-Hsing University Taichung40227 Taiwan Professional Engineering Program Department Faculty of Engineering Bina Nusantara University Jakarta11480 Indonesia National Kaohsiung University of Science and Technology Kaohsiung80778 Taiwan

The present study explores the remarkable photothermal properties and potential applications exhibited by melanoidin-enriched spent coffee grounds (SCGs). However, the inherent challenge lies in the substantial particle size of SCGs, leading to rapid sedimentation within the medium and resulting in uneven heat distribution during photothermal analysis. To overcome this obstacle, acid hydrolysis was employed to liquefy the SCGs, allowing their dispersion in water and significantly enhancing their light absorption capacity. The photothermal properties of liquefied SCGs (LSCGs) were analyzed under 808-nm near-infrared (NIR) irradiation and compared with those of SCGs. Remarkably, the photothermal conversion efficiency of the LSCGs was as high as 52%, twice that of SCGs. To further explore their potential, the LSCGs were incorporated into chitosan (CS) to create homogenous and porous CS/LSCGs composites. These low-cost and environmentally friendly CS/LSCGs composites, made entirely from waste materials, demonstrated photothermal properties under NIR irradiation. Notably, they exhibited excellent performance in multiple cycles of water evaporation experiments, achieving an impressive water evaporation efficiency of nearly 90%. © 2023 The Korean Society of Industrial and engineering Chemistry

关键词： Lignocellulose

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Ternary-phase layered cathodes toward ultra-stable and highrate sodium ion storage

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Rare Metals 2024年第4期43卷 1589-1598页

作者： Wen-Ji Yin Pei-Dan Su Qi Lu Xiao-Qiong Li Ji-Ming Peng Teng-Fei Zhou Ge-Meng Liang Yu-Liang Cao Hong-Qiang Wang Qing-Yu Li Si-Jiang Hu Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin541004China Institutes of Physical Science and Information Technology Anhui UniversityHefei230601China Department of Chemistry and Pharmaceutical Sciences Guilin Normal CollegeGuilin541199China College of Chemistry and Chemical Engineering Huanggang Normal UniversityHuanggang438000China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide5005Australia Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China

With the shortage of lithium resources,sodiumion batteries(SIBs)are considered one of the most promising candidates for lithium-ion batteries.P2-type and O3-type layered oxides are one of the few cathodes that can access high energy ***,they usually exhibit structural change,capacity decay,and slow Na ion ***,we present layered ternary-phase cathodes with P2,P3 and O3 phases by a lattice doping strategy,which is demonstrated by X-ray diffraction(XRD)*** the characteristics of P2,P3 and O3 phases,the layered composites show performance improvement during long-term battery *** particular,Na_(0.7)Li_(0.1)Co_(0.3-)Fe_(0.3)Mn_(0.3)O_(2)(NLCFM)delivers a reversible capacity of120.1 mAh·g^(-1)at 0.1C(1.0C=175 mA·g^(-1))with a superior capacity retention of 72.5%after 1000 cycles *** work offers insights into the development of advanced cathode materials for SIBs.

关键词： Sodium-ion battery Cathode material Layered oxides Lattice doping Mixed phase

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Smartly tuning supramolecular chirality in polymer gels via photoexcitation-induced cooperative self-assembly

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science China Chemistry 2025年第3期68卷 1126-1135页

作者： Bingbing Yue Yulong Shi Fan Yang Danfeng Ye Jian Jin Pilan Zhang Shen Song Yifei Xu Hui Lin Shihui Zhu Liangliang Zhu School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China College of Material Science and Chemical Engineering Ningbo University of TechnologyNingbo 315211China Shanghai Depeac Biotechnology Co. Ltd.Shanghai 201900China Burn and Plastic Surgery Department Children’s Medical Center Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200120China

Although supramolecular chirality tuning is prosperous in systems with small molecular building blocks,these systems lack structural strength and have limited practical ***,polymer systems do not exhibit these drawbacks but suffer from topological chain entanglement,which often leads to large dynamic obstacles and therefore limits the tunability of supramolecular ***,we report that by manipulating stoichiometry and employing light to alter the H-bond crosslinking between a photoexcitation-induced aggregatable molecule and high molecular weight poly(L-lactic acids),supramolecular chirality tuning of the polymer gel systems can be achieved in different ways through a cooperative ***,the Cotton effects of the examined systems can be negatively tuned by varying their stoichiometry,while positive tuning can be realized by *** deexcitation,negative Cotton effect tuning occurs again spontaneously in some *** supramolecular chirality tuning is accompanied by rheological property tuning,demonstrating that our strategy can overcome polymer chain entanglement *** proposed strategy inspires further works on the precise control of polymer chirality and,hence,development of asymmetric materials with changeable optical activity and modulus.

关键词： supramolecular chirality polymer gels phototuning self-assembly rheological property

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Structure-Property Relationship of Conjugated Polymers Utilizing Isomerized Fused Benzothiadiazole-Based Building Blocks

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Chinese Journal of Chemistry 2023年第19期41卷 2525-2530页

作者： Jingyu Liu Wenhao Li Kaihu Xian Zhongwei Liu Yanru Li Xiang Yao Long Ye Yan Zhao Zhuping Fei Institute of Molecular Plus Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin300072 China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192 China Laboratory of Molecular Materials and Devices Department of Materials ScienceFudan UniversityShanghai200438 China School of Materials Science and Engineering Tianjin UniversityTianjin300072 China

Only a few fused benzothiadizole(BTz)based conjugated polymers have been applied in organic field-effect transistors(OFETs),and their performances were low,mainly due to the lack of available building blocks and in-depth study of the relationship between structure and ***,we report two isomeric fused BTz-based building blocks(M1 and M2)and their copolymers PBTzVBTz-T and PBTzVBTz-TT,PTVT-T and *** study showed all polymers had nearly planar backbone geometries,and PBTzVBTz-TT exhibited the most linear ***-T and PTVT-TT exhibited red-shift absorption spectra and deeper LUMO level than those of PBTzVBTz-T and *** film microstructure study demonstrated PBTzVBTz-TT and PTVT-TT had edge-on molecular orientation,while the others had the mixed molecular orientation of edge-on and ***,PBTzVBTz-TT had the longest coherence length in thin *** these features of PBTzVBTz-TT resulted in its highest carrier mobility of 0.1 cm^(2)·V^(–1)·s^(–1) among these polymers.

关键词： Conjugated polymers Organic field-effect transistors Benzothiadiazole Isomerization Fused-ring systems

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Recent advances in bismuth-based photocatalysts:Environment and energy applications

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Green Energy & Environment 2023年第5期8卷 1232-1264页

作者： Sijia Song Zipeng Xing Huanan Zhao Zhenzi Li Wei Zhou Department of Environmental Science School of Chemistry and Materials ScienceKey Laboratory of Functional Inorganic Material ChemistryMinistry of Education of the People's Republic of ChinaHeilongjiang UniversityHarbin150080China Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan250353China

Photocatalysis is an effective way to solve the problems of environmental pollution and energy *** photocatalysts have been developed and various strategies have been proposed to improve the photocatalytic *** them,Bi-based photocatalysts have become one of the most popular research topics due to their suitable band gaps,unique layered structures,and physicochemical *** this review,Bi-based photocatalysts(BiOX,BiVO_(4),Bi_(2)S_(3),Bi_(2)MoO_(6),and other Bi-based photocatalysts)have been summarized in the field of photocatalysis,including their applications of the removal of organic pollutants,hydrogen production,oxygen production *** preparation strategies on how to improve the photocatalytic performance and the possible photocatalytic mechanism are also summarized,which could supply new insights for fabricating high-efficient Bi-based ***,we summarize the current challenges and make a reasonable outlook on the future development direction of Bi-based photocatalysts.

关键词： Photocatalysis Bismuth based photocatalyst Hydrogen evolution Solar fuel energy Environment remediation

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Porous framework materials for energy&environment relevant applications:A systematic review

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Green Energy & Environment 2024年第2期9卷 217-310页

作者： Yutao Liu Liyu Chen Lifeng Yang Tianhao Lan Hui Wang Chenghong Hu Xue Han Qixing Liu Jianfa Chen Zeming Feng Xili Cui Qianrong Fang Hailong Wang Libo Li Yingwei Li Huabin Xing Sihai Yang Dan Zhao Jinping Li College of Chemical Engineering and Technology Shanxi Key Laboratory of Gas Energy Efficient and Clean UtilizationTaiyuan University of TechnologyTaiyuan030024China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou510640China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China Department of Chemistry The University of ManchesterManchesterM139PLUK Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou311215China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun130012China Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of ChemistryUniversity of Science and Technology BeijingBeijing100083China

Carbon peaking and carbon neutralization trigger a technical revolution in energy&environment related *** of new technologies for green energy production and storage,industrial energy saving and efficiency reinforcement,carbon capture,and pollutant gas treatment is in highly imperious *** emerging porous framework materials such as metal–organic frameworks(MOFs),covalent organic frameworks(COFs)and hydrogen-bonded organic frameworks(HOFs),owing to the permanent porosity,tremendous specific surface area,designable structure and customizable functionality,have shown great potential in major energy-consuming industrial processes,including sustainable energy gas catalytic conversion,energy-efficient industrial gas separation and ***,this manuscript presents a systematic review of porous framework materials for global and comprehensive energy&environment related applications,from a macroscopic and application perspective.

关键词： Porous framework materials Catalysis Separation Gas storage Carbon neutrality

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