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Polymeric materials reinforced by noncovalent aggregates of polymer chains 被引量:1
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作者 Xiaokong Liu Junqi Sun 《Aggregate》 2021年第5期45-61,共17页
Mechanical performances are among the most fundamental properties that dictate the applicability and durability of polymeric materials.Reinforcement of polymeric materials is eternally pursued to broaden the applicati... Mechanical performances are among the most fundamental properties that dictate the applicability and durability of polymeric materials.Reinforcement of polymeric materials is eternally pursued to broaden the applications of polymers with light-weight,low-cost and easy-processing advantages.Noncovalent aggregates of biomacromolecules have been found to play a significant role in the mechanical properties of many natural materials,such as the spider silk.Increasing numbers of reports have demonstrated that the in situ formed noncovalent aggregates of polymer chains in polymeric systems are highly effective for enhancing the mechanical properties of artificial polymeric materials,in terms of strength,stiffness,toughness,and/or elasticity.The in situ formed noncovalent aggregates act as additional crosslinking domains and well-dispersed“hard”nanofillers in the polymer networks,significantly strengthening,stiffening and/or toughening the polymeric materials.Moreover,the noncovalent crosslinking of polymer chains favors the development of healable and recyclable polymeric materials,thanks to the reversible and dynamic properties of noncovalent bonds.This review provides an overview of the recent advances on the enhancement of the mechanical properties of different polymeric materials by the in situ formed noncovalent aggregates of polymer chains.It is expected to arouse inspirations for the development of novel polymeric materials with extraordinary mechanical performances and functionalities. 展开更多
关键词 AGGREGATES noncovalent bonds polymeric materials self-healing materials supramolecular materials
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A Single-Fluorophore Multicolor Molecular Sensor That Visually Identifies Organic Anions Including Phosphates
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作者 Zezhou Zong Qi Zhang Da-Hui Qu 《CCS Chemistry》 CSCD 2024年第3期774-782,共9页
Developing fluorescent sensors for small-molecule phosphates offers opportunities in optically detecting biorelevant reactions and events.However,it remains elusive how to identify phosphates from other anions,such as... Developing fluorescent sensors for small-molecule phosphates offers opportunities in optically detecting biorelevant reactions and events.However,it remains elusive how to identify phosphates from other anions,such as carboxylates and sulfates,because current synthetic phosphate receptors lack selectivity.Here we report the construction of a multicolor fluorescent sensor that can identify phosphates from other analogous anions.The key design principle is to take advantage of the highly sensitive conformation-dependent emissive wavelength of diphenyl-9,14-dihydrodibenzo[a,c]phenazine fluorophores to sense the minor structural differences between phosphates and other anions,for example,sulfates and carboxylates.The effect of structural factors such as spacer length and urea versus thiourea has been investigated by comparing the optical properties and binding affinities with the phosphate receptors.This strategy provides a simple and robust fluorescent sensing solution to optically analyze small-molecule phosphates with antiinterference performance. 展开更多
关键词 fluorescent sensors PHOTOLUMINESCENCE host-guest chemistry supramolecular chemistry noncovalent bonds
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Cellulose-based hydrogels regulated by supramolecular chemistry 被引量:1
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作者 Danning Hu Min Zeng +2 位作者 Yafei Sun Jinying Yuan Yen Wei 《SusMat》 2021年第2期266-284,共19页
Supramolecular hydrogels based on cellulose attract increasing attention because of their novel structures and broad potential applications.In this review,hydrogels composed of cellulose are summarized according to ca... Supramolecular hydrogels based on cellulose attract increasing attention because of their novel structures and broad potential applications.In this review,hydrogels composed of cellulose are summarized according to category of supramolecular interactions in the networks including hydrogen bonds,electrostatic interactions,host-guest interactions,and others.Supramolecular cellulose-based hydrogels constructed by noncovalent bonding usually exhibit environmental friendliness,designing flexibility and diverse functions,and their properties are variable with incorporating different interactions in hydrogel networks.Moreover,with proper structures and networks,the supramolecular cellulose-based hydrogels are adaptable in diverse fields of research and practical applications,such as self-healing,shape memory,drug delivery,and some other renewable/sustainable materials.The future developments and challenges of the supramolecular hydrogels based on cellulose are discussed as well. 展开更多
关键词 CELLULOSE HYDROGELS noncovalent bonds SELF-HEALING shape memory supramolecular chemistry
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