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Fulgide Derivative-Based Solid-State Reversible Fluorescent Switches for Advanced Optical Memory

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CCS Chemistry 2022年第1期4卷 132-140页

作者： Yang Jiao Runqing Yang Yuchao Luo Leijing Liu Bin Xu Wenjing Tian State key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012

Solid-state fluorescent switches with reversible luminescence characteristics have attracted considerable attention because of their broad applications in advanced photonics,such as anticounterfeiting inks,optical writing and erasing,and biological ***,we have fabricated a solid-state reversible fluorescent switch under alternating UV(365 nm)and visible light treatments based on a fulgide(FUL)-functionalized tetraphenylethylene(TPE)derivative(TPE-FUL)containing a photochromic group FUL and aggregation-induced emission(AIE)luminogen ***-FUL exhibited excellent reversible absorption and luminescence owing to the interconversion between open TPE-FUL(O-TPE-FUL)and closed TPE-FUL(C-TPE-FUL).Photophysical and theoretical investigations revealed that the luminescence of O-TPE-FUL is based on the local excited state of the TPE moiety,whereas the fluorescence quenching of C-TPE-FUL originates from the intramolecular charge transfer from the TPE to the FUL *** excellent reversible photoswitching properties of TPE-FUL in the solid state allows for its potential use in advanced optical memory applications,such as anticounterfeiting,optical writing and erasing,and information encryption.

关键词： solid-state fluorescent switch fulgide AIE anticounterfeiting information encryption

Organic Light-Emitting Diodes Based on an Iron(III) Complex with Doublet Emission

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CCS Chemistry 2022年第9期4卷 2953-2958页

作者： Zhiyuan Cui Junshuai Ding Yuhang Gao Feng Li State key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012

Because iron is the richest transition-metal element in the earth’s crust,if iron complexes could be used as the emitters in organic light-emitting diodes(OLEDs),the cost of OLEDs would be reduced *** iron(III)complexes with low-spin d5 electronic structure theoretically possess spin-allowed doublet metal-to-ligand charge transfer(^(2)MLCT)emission,but little attention has been paid to their application in OLEDs.

关键词： doublet emission luminescent iron complex organic light-emitting diodes open-shell molecule metal-to-ligand charge transfer internal quantum efficiency

Highly Stretchable,Elastic,Healable,and Ultra-Durable Polyvinyl Alcohol-Based Ionic Conductors Capable of Safe Disposal

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CCS Chemistry 2022年第9期4卷 3170-3180页

作者： Siheng Li Yixuan Li Yuting Wang Hongyu Pan Junqi Sun State key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012

Highly durable and stretchable ionic conductors are indispensable components of flexible ***,fabricating such ionic conductors that are also non-toxic and biodegradable remains a *** this study,highly stretchable,elastic,healable,and ultra-durable ionic conductors capable of non-hazardous disposal are conveniently fabricated by complexation of vanillin-grafted polyvinyl alcohol(VPVA)and ionic liquids(ILs)(denoted as VPVA-IL).

关键词： ionic conductors self-healing materials ionogels supramolecular materials

Exploring the Nanomechanical Properties of a Coordination-bond Based supramolecular Polymer

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Chinese Journal of Polymer Science 2022年第12期40卷 1613-1622,I0008页

作者： Rui-Xiang Yao Jun-Juan Shi Ke-Huan Li Xin Liu Hou-Yu Zhang Ming Wang Wen-Ke Zhang State key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012China Institute of Theoretical Chemistry College of ChemistryJilin UniversityChangchun 130012China

Due to their dynamic nature and strength tunability,metallo-supramolecular polymers have been introduced into various *** mechanical strength of the metallo-supramolecular polymers in the system directly influences the mechanical properties(e.g.,the toughness)of the ***,it is necessary to explore the mechanical behavior of the metallo-supramolecular ***,we present a single-molecule method to systematically explore the chain structure and mechanical properties of metallo-supramolecular polymer by using a loop protected ***,we found that the mechanical stability of the individual chain,which is determined by the strength of terpyridine-Fe^(2+) -terpyridine(tpy-Fe^(2+)-tpy)bonds,was about 0.6–1.0 nN,depending on the pulling *** value is around three times higher than those measured using old *** addition,the unique loop protected structure further reduces the interference of non-specific polymer-AFM tip(or polymer-substrate)interactions on the quantification of the actual strength and kinetic parameter of noncovalent interactions in supramolecular ***,the single chain flexibility of the metallo-supramolecular polymer was investigated and found to be comparable to the corresponding covalent *** findings provide a new way to explore the force response of supramolecular polymers composed of metal-ligand interactions and will be useful for the design of metallo-supramolecular polymer-based functional materials with tailored mechanical properties.

关键词： supramolecular polymer Single-molecule force spectroscopy Coordination chemistry Polymer mechanochemistry

A new semiconductor-based SERS substrate with enhanced charge collection and improved carrier separation: CuO/TiO_(2) p-n heterojunction

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Chinese Chemical Letters 2023年第7期34卷 434-438页

作者： Dongxue Yu Lin Xu Huizhu Zhang Jia Li Weie Wang Libin Yang Xin Jiang Bing Zhao College of materials Science and Engineering College of PharmacyJiamusi UniversityJjiamusi 154007China State key laboratory of supramolecular structure and materials jilin UniversityChangchun 130012China

In this paper, CuO/TiO_(2) p-n heterojunction was developed as a new surface enhanced Raman scattering(SERS) substrate to magnify Raman signal of 4-mercaptobenzoic acid(4-MBA) molecule. In the heterojunction-molecule system, CuO as an “electron capsule” can not only offer more electrons to inject into the surface state energy level of TiO_(2) and consequently bring additional charge transfer, but also improve photogenerated carrier separation efficiency itself due to strong interfacial coupling in the interface of heterojunction, which together boost SERS performance of the heterojunction substrate. As expected,owing to the enhanced charge collection capacity and the improvement of photogenerated carrier separation efficiency derived from internal electric field and strong interface coupling provided in the interface of heterojunction, this substrate exhibits excellent SERS detection sensitivity towards 4-MBA, with a detection limit as low as 1 × 10^(-10)mol/L and an enhancement factor of 8.87 × 10~6.

关键词： SERS CuO/TiO_(2)heterojunction Photo-induced charge transfer Semiconductor substrate Charge collection Carrier separation

Unimolecular Transmembrane Na^(+) Channels Constructed by Pore-Forming Helical Polymers with a 2.3A Aperture

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CCS Chemistry 2022年第6期4卷 1850-1857页

作者： Shuaiwei Qi Jun Tian Jing Zhang Lei Zhang Chenyang Zhang Ze Lin Jing Min Shizhong Mao Zeyuan Dong State key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012

To understand the relationships between channel size and ion selectivity,we have developed a new type of artificial ion channel based on pore-forming helical polymers consisting of phenanthrolineoxadiazole units with a pore aperture 2.3A close to the diameter of the Na^(+)ion(2.04A).Successful preparation of high molecular weight helical polymers(HP1)gives rise to a 4.6 nm long artificial unimolecular transmembrane *** transport property of artificial channel HP1 was elaborately investigated by means of vesicle-based kinetic assay and symmetry/asymmetry bilayer membrane(BLM)experiments as *** results unambiguously demonstrate that HP1 is a Na^(+)-selective channel with extremely high transport activity(EC_(50)=0.017 mol% relative to lipid).Moreover,the Na^(+)/K^(+)selectivity ratio of HP1 reaches 1.9,as determined by asymmetry BLM *** to the narrowest 2.3A size constraint so far,HP1 transport naked Na^(+)ion across the membrane,which represents a different Na^(+)transport mode from that of natural Na^(+)channels,which transports partially hydrated Na^(+)ions during transmembrane *** study provides crucial insights on the chemical basis of ion selectivity in the field of ion channels.

关键词： artificial sodium channel lumen size unimolecular channel helical polymer size constraint

Organic Functional Free Radicals

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Chemical Research in Chinese Universities 2023年第2期39卷 159-160页

作者： LI Feng State key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun130012P.R.China

Organic free radicals are characterized by their"open-shell"electronic structures,meaning that they contain one or more unpaired electrons in singly occupied molecular orbitals(SOMOs),which is in contrast to the closed-shell structure of traditional organic molecules containing paired electrons in all their occupied *** unpaired electrons endow organic free radicals with distinct fluorescent,magnetic,and electronic properties,which have garnered significant *** most free radicals are highly unstable,their stability can be greatly enhanced through reasonable structural *** fact,various series of stable free radicals have been developed that can be isolated and stored under ambient atmosphere for extended periods of *** resolution of the stability issue has opened up the possibilities for functionalizing organic free radicals.

关键词： occupied stability radicals

Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector

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Light(Science & Applications) 2022年第11期11卷 2716-2724页

作者： Mingrui Tan Mingbian Li Wanting Pan Xiaopeng Feng Yuhong He Junjun Liu Fengxia Dong Haotong Wei Bai Yang State key laboratory of supramolecular structure and materials College of ChemistryJilinUniversity130012 ChangchunChina Optical Functional Theranostics Joint laboratory of Medicine and Chemistry The First Hospital of Jilin University130012 ChangchunChina

Quasi-2D perovskites have been demonstrated to be competitive materials in the photodetection fields due to the enhanced moisture stability by large organic ***,as the increasing demands of modern technology,it is still challenging to combine the flexibility with the capability of weak light detection in a low-cost ***,amides,carboxylic acids,and anhydrides groups-rich carbonized polymer dots(CPDs)were employed to fll in the perovskite grain boundaries,which can passivate the point defects of perovskite by coordinating with the unbonded Pb atoms,and reduce the leakage *** light detection capability was demonstrated by directly resolving light with an intensity of 10.1 pW cm^(-2).More importantly,the stretchable polymer chains on CPDs strongly interact with perovskite ions through multiple supramolecular interactions,and extend the stretchable properties to the perovskite/CPDs composites,which can maintain the integral structure stability during the deformation of perovskite crystals and restricted any crack by releasing the flm *** fabricated devices show extraordinary flexible stability in the bending-dependent response *** viscoelasticity of CPDs improves the bending stability of the flexible quasi-2D perovskite photodetectors,and device performance shows no degradation after bending 10000 times,comparable or even outperforming the dominating flexible photodetectors.

关键词： perovskite stability bending

AIE interfacial supramolecular polymers

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Chinese Chemical Letters 2024年第1期35卷 316-320页

作者： Qingyun Li Ziqing Hu Xiaofan Ji key laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

High monomer concentration is a requisite for engendering the aggregation-induced emssion(AIE)phenomenon as well as the formation of supramolecular ***,this is supposed to ensure the generation of AIE supramolecular polymers,wherein the monomer soluability takes ***,parts of supramolecular monomers are considered as poessessing different soluability towards the same sovlent,through which the polymerzation process is thus hard to *** polymerzation gets over the soluabilty restriction,providing a facile method for propelling the reaction of ***,we had prepared M1 containing tetraphenylethene(TPE)functionalized with two terpyridine derivatives,then making M1 dissolving in CHCl3 to give ***^(2+)solutions were fabricated through dissolving CuCl_(2)into *** mixing those solutions,AIE interfacial supramolecular polymers(AIEISPs)displaying green fluorescence were generated at the interface of two phases on the basis of metal-coordination between terpyridine and Cu^(2+).These AIEISPs were certificated to possess the stimuli-responsiveness,for which the excessive addition of tetrabutylammonium hydroxide would cause the structure destruction owing to the stronger bonding ability with Cu^(2+)than that of *** fabricated AIEISPs had provided a new avenue to prepare AIE supramolecular polymers.

关键词： Aggregation-induced emission Interfaces Metal-coordination interactions supramolecular polymers Stimuli-responsiveness