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CCS Chemistry 2023年第9期5卷 2140-2151页

作者： Xin Zhang Jingxuan You Jinming Zhang Chunchun Yin Yirong Wang Ruiqiao Li Jun Zhang CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190 University of Chinese Academy of Sciences Beijing 100049

Constructingeco-friendlystimuli-responsivephosphorescence materials remains challenging and ***,we use natural cellulose as the rawmaterial to prepare pH-responsive room-temperature phosphorescent(RTP)materials with excellent biodegradability by introducing anionic *** introduction of a phenylcarboxylate substituent not only promotes intersystem crossing but also brings about electrostatic-attractive and strong hydrogenbonding interactions,which enhance the intermolecular chain ***,the obtained anionic cellulose derivatives containing phenylcarboxylate groups exhibit ultra-long *** intriguingly,these cellulose-based phosphorescent materials have a distinctive pH-responsive *** acidic conditions,the carboxylate is converted into the carboxylic acid,resulting in phosphorescence *** process is ***,the obtained cellulosebased phosphorescent materials have excellent processability and can be easily processed into various material forms,such as film,coating,and pattern,by using eco-friendly aqueous solution processing *** proof-of-concept biomass-based phosphorescent materials with unique pH-responsive behavior and excellent processability have a huge potential in information encryption,advanced anti-counterfeiting,and food monitoring.

关键词： phosphorescence responsive materials cellulose ionic materials information encryption

Bioengineering extracellular vesicles as novel nanocarriers towards brain disorders

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Nano Research 2023年第2期16卷 2635-2659页

作者： Jie Wu Lei Ma Danni Sun Xinru Zhang Jiwei Cui Yingjiang Du Yumiao Guo Xue Wang Liuqing Di Ruoning Wang College of Pharmacy Nanjing University of Chinese MedicineNanjing 210023China Jiangsu Provincial TCM Engineering Technology Research Center of High Efficient Drug Delivery System Nanjing 210023China

Despite noteworthy technological progress and promising preclinical trials,brain disorders are still the leading causes of death *** vesicles(EVs),nano-/micro-sized membrane vesicles carrying bioactive molecules,are involved in cellular *** on their unique properties,including superior biocompatibility,non-immunogenicity,and blood-brain barrier(BBB)penetration,EVs can shield their cargos from immune clearance and transport them to specific site,which have attracted increasing interests as novel nanocarriers for brain ***,considering the limitations of native EVs,such as poor encapsulation efficiency,inadequate targeting capability,uncontrolled drug release,and limited production,researchers bioengineer EVs to fully exploit the clinical ***,this review initially describes the basic properties,biogenesis,and uptake process of EVs from different ***,we highlight the application of EVs derived from different sources for personalized therapy and novel strategies to construct bioengineered EVs for enhanced diagnosis and treatment of brain ***,it also presents a systematic comparison between EVs and other brain-targeted ***,existing challenges and future perspectives of EVs have been discussed,hoping to bolster the research from benchtop to bedside.

关键词： brain disorders extracellular vesicles drug delivery platforms bioengineering strategies responsive materials

Stimuli-responsive Polycycles Based on Hetero-Buckybowl Trithiasumanene

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Chinese Journal of Chemistry 2021年第12期39卷 3413-3420页

作者： Wenbo Wang Lijun Feng Xinqiang Hua Chengshan Yuan Xiangfeng Shao State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityTianshui Southern Road 222LanzhouGansu 730000China

Stimuli-responsive molecules are highly desirable in different scenario such as smart materials,bio-imaging,and environment ***,a series of hetero polycycles which show optical response toward chemical stimuli are synthesized from trithiasumanene(TTS).The TTS is transformed into ortho-quinone form,which then undergoes three-component Debus-Radziszewski reaction with aldehydes and ammonia to give oxazole-fused TTS(2-6).The thiophene rings on 3-5 are selectively oxidized to thiophene-S,S-dioxides,affording 3-3O_(2)-5-3O_(2).It is found that the electronic structures of these compounds are governed by the sub-stituents on oxazole moiety and oxidation state of thiophene ***,these hetero polycycles exhibit optical response toward different chemical ***,compounds 6 and 3-3O_(2) can serve as fluorescence detectors for harmful chemicals sulfide ions(S2-/HS-)and aniline,*** work indicates that TTS is a promising precursor for the creation of responsive materials.

关键词： responsive materials Polycycles Heterocycles Sensors Trithiasumanene

[c2]Daisy Chain Rotaxanes as Molecular Muscles

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CCS Chemistry 2019年第1期1卷 83-96页

作者： Antoine Goujon Emilie Moulin Gad Fuks Nicolas Giuseppone SAMS Research Group Institut Charles SadronCNRSUniversity of Strasbourg BP 84047Strasbourg cedex 2France

Bistable[c2]daisy chain rotaxanes represent a par-ticularly intriguing class of interlocked molecules that can produce internal sliding movements with a net contraction or extension at the single-molecule level.

关键词： molecular machines supramolecular chemistry polymers responsive materials

Photothermalprogramming of magnetic soft materials for complex and reconfigurable 3D deformations

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Science China materials 2024年第12期67卷 4031-4039页

作者： Yiwen Bao Jiyu Li Tao Wang Liu Wang Hangxun Xu Collaborative Innovation Center of Chemistry for Energy materials(iChEM) Key Laboratory of Precision and Intelligent ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Mechanical Behavior and Design of materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

responsive soft materials capable of complex,reversible,and rapid geometric deformations under external stimuli hold significant potential for applications in minimally invasive medicine,wearable devices,and soft *** this study,we present a novel approach for designing reconfigurable three dimensional(3D)deformable magnetic soft materials through photothermal *** embedding hard magnetic particles within a polymer matrix composed of fibrous polypyrrole(PPy)and semi-crystalline polymer,we develop magnetic composites that can be remotely controlled to achieve precise,programmable deformations under an external magnetic *** key innovation lies in utilizing the photothermal effect of PPy,which temporarily alters the viscosity of the composite when irradiated with infrared light,allowing dynamic orientation of the magnetic *** cooling,the magnetic anisotropy is solidified,enabling rapid and reversible geometric *** method allows for intricate control over the magnetization distribution,leading to the development of multifunctional devices with various potential applications such as complex 3D deformations for soft robotics,multimodal electrical switches,rewritable quick response codes,and shape-adaptable *** study not only enhances the understanding of magnetic moment programming in soft materials but also opens new avenues for the design of adaptive and responsive materials for advanced technological applications.

关键词： photothermal reprogramming magnetic soft materials 3D deformation soft robotics responsive materials

responsive Polymeric Assemblies

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Responsive Polymeric Assemblies