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Engineering multifunctional bioadhesive powders through dynamic metal-ligand coordination

Science China Chemistry 2022年第11期65卷 2260-2273页

作者： Junchang Guo Yue Hou Liansong Ye Junnan Chen Hong Wang Li Yang Jinbo Jiang Qiangqiang Sun Chaoming Xie Bing Hu Jiaxi Cui Xu Deng Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China West China Hospitcal Sichuan UniversityChengdu 610041China Institute for Advanced Study Chengdu UniversityChengdu 610106China

Bioadhesive gels with robust adhesion on wet and irregular tissue surfaces are desirable for clinical *** of bioadhesive powders is an effective strategy for obtaining gels that adhere to wet and irregular tissue surfaces by absorbing interfacial ***,current bioadhesive powders lack positive biological functions and are prone to postoperative ***,we present a powder strategy based on metal-ligand coordination to create a series of bioadhesive polyacrylic acid(PAA)*** the gel network,metal ions(M^(n+))are used to coordinate with the carboxy ligands of PAA to form dynamic noncovalent *** powders can absorb interfacial water and assemble into gels on wet and irregular tissue surfaces within a few seconds,forming an initial adhesion layer by electrostatic ***,the polymers can diffuse into the tissue matrix,and metal-ligand coordination is reconstructed to enhance the ***,with a cationic shield layer,the bioadhesive powders can effectively avoid postoperative ***,M^(n+) ions endow the gel with customized biological *** demonstrate that the hemostatic,antibacterial,peroxidase-like catalytic,and photodetachment abilities of the gels by incorporating different M^(n+) *** advantages make the bioadhesive powder a promising platform for diverse tissue repair applications.

关键词： bioadhesive powders adhesive gel water-triggered gelation metal-ligand coordination functional gel

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A linear supramolecular polymer based on host-guest recognition and metal-ligand coordination

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Chinese Chemical Letters 2018年第6期29卷 970-972页

作者： Chao Xu Lei Xu Xiang Ma Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology

linear main-chain supramolecular polymer was constructed in aqueous solution via g-CD host recognition with coumarin unit as well as metal-ligand coordination between terpyridine unit and Zn2＋.Therein, the multiple non-covalent interactions produce the ternary system as the primary ***, the self-assembly behavior and morphological properties of this supramolecular polymer system were characterized by DLS and TEM experiments

关键词： Supramolecular polymer Host-guest recognition metal-ligand coordination y-Cyclodextrin

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Near-Infrared-Emissive Self-assembled Polymers via the Implementation of Molecular Tweezer/Guest Complexation on a Supramolecular coordination Complex Platform

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Chinese Journal of Polymer Science 2018年第3期36卷 399-405页

作者： Zong-Chun Gao Cheng-Peng Wei Yi-Fei Han Ming Yuan Xu-Zhou Yan Feng Wang Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026 China Department of Chemical Engineering Stanford UniversityCalifornia 94305United States Faculty of Pharmaceutical Engineering Bengbu Medical CollegeAnhui Engineering Technology Research Center of Biochemical PharmaceuticalsBengbu 233030china

coordination-driven self-assembly strategy has demonstrated the efficiency and versatility to construct well-ordered supramolecular coordination complexes （SCCs） such as discrete metallacycles and metallacages. In recent years, it has aroused tremendous interest to build more complexed self-assembled structures via the implementation of additional non-covalent recognition motifs on the SCCs platform. In this work, we have successfully attained this objective, with the elaborate manipulation of non-interfering pyridine-Pt2＋ and molecular tweezer/guest complexation in a hierarchical self-assembly manner. The resulting SCCs-based linear supramolecular polymers exhibit intriguing NIR-emissive behaviors, primarily attributed to the presence of intermolecular Pt（II）-Pt（II） metal-metal interactions in the non-covalent tweezering structure. Hence, supramolecular engineering of multiple non-covalent interactions offers a feasible avenue toward functional materials with tailored properties.

关键词： Supramolecular chemistry metal-ligand coordination Molecular tweezer Pt(II)-Pt(II) interactions Near-Infrared-Emission

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A Self-Healing Elastomer with Extremely High Toughness Achieved by Acylsemicarbazide Hydrogen Bonding and Cu^(2+)-Neocuproine coordination Interactions

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Chinese Journal of Polymer Science 2024年第10期42卷 1425-1434,I0007页

作者： Xiao-Ming An Yi-Ping Wang Tang-Song Zhu Chong Xing Xu-Dong Jia Qiu-Hong Zhang Key Laboratory of High Performance Polymer Material and Technology of MOE Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210093China State Key Laboratory of coordination Chemistry Nanjing UniversityNanjing210093China

Elastomers with high mechanical toughness can guarantee their durability during service ***-healing ability,as well as recyclability,can also extend the life of materials and save the consuming cost of the *** efforts have been dedicated to promoting the mechanical toughness as well as the self-healing capability of elastomers at the same time,while it remains a challenge to balance the trade-off between the above properties in one *** we proposed a molecular design driven by dual interactions of acylsemicarbazide hydrogen bonding and Cu^(2+)-neocuproine coordination *** introducing the reversible multiple hydrogen bonds and strong coordination bonds,we successfully fabricated an extremely tough and self-healing *** elastomer can achieve an impressive top-notch toughness of 491 MJ/m^(3).Furthermore,it boasted rapid elastic restorability within 10 min and outstanding crack tolerance with high fracture energy(152.6kJ/m^(2)).Benefiting from the combination of dynamic interactions,the material was able to self-repair under 80℃conveniently and could be reprocessed to restore the exceptional mechanical properties.

关键词： metal-ligand coordination Hydrogen bond Ultra-tough elastomer Self-healing

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Two-dimensional (2D) Supramolecular coordination at Liquid/ Solid Interfaces Studied by Scanning Tunneling Microscopy

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Chinese Journal of Chemistry 2015年第1期33卷 53-58页

作者： Jing Xu Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology(NCNST)Beijing 100190China

In this review, supramolecular coordination processes on two-dimensional (2D) surfaces or interfaces observed by scanning tunneling microscopy (STM) are discussed. Four parts are mainly involved, which include (1) recognition of Fe^(3+) through functional molecular networks, (2) K^(+)-induced switching of valinomycin, (3) supramolecular coordination happened in a nano-reactor, (4) reversible 2D supramolecular spring driven by coordination. The direct insight of the coordination phenomena provided by STM supplements our knowledge of its mechanism. Since different building blocks can be connected into a whole part through coordination, the understanding of its mechanism will be beneficial to the future design of molecular devices.

关键词： metal-ligand coordination scanning tunneling microscopy(STM) self-assembly

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Protein self-assembly: technology and strategy

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Science China Chemistry 2016年第12期59卷 1531-1540页

作者： Linlu Zhao Shanpeng Qiao Junqiu Liu State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University

Proteins, as the premier building blocks in nature, exhibit extraordinary ability in life activities during which process proteins mostly self-assemble into large complexes to exert prominent functions. Inspired by this, recent chemical and biological stud- ies mainly focus on supramolecular self-assembly of proteins into high ordered architectures, especially the assembly suategy to unravel tile formation and function of protein nanostructures. In this review, we st, mmarize the progress made in the engi- neering of supramolecular protein architectures according to the strategies used to control the orient：ilion and the order of the assembly process. Furthermore, potential applications in biomedical areas of the supramolecular protein nanostructures will also be reviewed.

关键词： protein assembly supramolecular strategy self-assembly electrostatic interaction metal-ligand coordination

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Bisphosphonate-based nanocomposite hydrogels for biomedical applications

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Bioactive Materials 2020年第4期5卷 819-831页

作者： Weihao Yuan Zhuo Li Xian Xie Zhi-Yong Zhang Liming Bian Department of Biomedical Engineering The Chinese University of Hong KongShatinHong Kong999077PR China Shenzhen Research Institute The Chinese University of Hong KongShenzhen518172PR China Translational Research Centre of Regenerative Medicine and 3D Printing of Guangzhou Medical University Guangdong Province Engineering Research Center for Biomedical EngineeringState Key Laboratory of Respiratory DiseaseThe Third Affiliated Hospital of Guangzhou Medical UniversityNo.63 Duobao RoadLiwan DistrictGuangzhou CityGuangdong Province510150PR China China Orthopedic Regenerative Medicine Group(CORMed) HangzhouZhejiang310058PR China

Nanocomposite hydrogels consist of polymeric network embedded with functional nanoparticles or nanostructures,which not only contribute to the enhanced mechanical properties but also exhibit the bioactivities for regulating cell ***(BPs)are capable of coordinating with various metal ions and modulating bone *** to the inherent dynamic properties of metal–ligand coordination bonds,BPbased nanocomposite hydrogels possess tunable mechanical properties,highly dynamic structures,and the capability to mediate controlled release of encapsulated therapeutic agents,thereby making them highly versatile for various biomedical *** review presents the comprehensive overview of recent developments in BP-based nanocomposite hydrogels with an emphasis on the properties of embedded nanoparticles(NPs)and interactions between hydrogel network and ***,various challenges in the biomedical applications of these hydrogels are discussed to provide an outlook of potential clinical translation.

关键词： Bisphosphonates metal-ligand coordination Nanocomposite hydrogels

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