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Chinese Journal of Chemistry 2023年第13期41卷 1545-1551页

作者： Wanyuan Wei Mengjiao Wu yulan chen State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunJilin130012 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouGansu730000 China Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryTianjin UniversityTianjin300354 China

Flexible strain sensors are essential components of wearable electronic *** we report a new kind of flexible strain sensor by filling conductive nanowires in elastomers featuring a concentration *** fabrication method involves a fast photo-induced copolymerization of acrylates in the presence of gradient deposited polypyrrole(PPy)nanowires,which is facile and cost-effective in steadily doping PPy into elastomeric *** combination of delicately selected polyacrylates as the matrix filled with entangled,nano-sized PPy endows the sensor good stretchability,sensitive deformation-electrical signal conversion and high fatigue resistance,which can be used repeatedly without scarifying the sensitivity of electrical ***,the lower side of the composite films exhibits high light absorption(>98%)in a wide spectral range(250—2400 nm).Systematic characterizations of the sensors support that the excellent strain sensing and light-heat conversion performances are essentially dependent on the gradient filling of PPy ***,the applications of this flexible strain sensor for human motion monitoring and wearable thermotherapy are demonstrated,manifesting a promising option for wearable electronics and personalized healthcare.

关键词： Strain sensorl Flexible electronic Light trapping Elastomer Photothermal therapy

Visible Light-driven Self-healable Mechanochromic Polyurethanes

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Chemical Research in Chinese Universities 2023年第5期39卷 757-762页

作者： HAN Jinpeng YUAN Yuan chen yulan Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryTianjin UniversityTianjin 300354P.R.China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012P.R.China

Polyurethanes incorporating spiropyran(SP)and diselenide(DiSe)in the main chain,which are confined in different hard segments are *** light-driven diselenide metathesis and mechanically induced ring opening of SP offer self-healing and mechanochromic properties of the polymers,*** selection of the polymer backbone is found essential to promote the dual *** particular for polyurethane with SP coupled into 4,4'-methylenebis(cyclohexyl isocyanate)and DiSe linked with isophorone diisocyanate,excellent mechanical,mechanochromic and self-healing properties are ***,combining self-healing and self-reporting moieties in one chain allows the discrimination of different healing mechanisms,including bond formation and chain entanglement,in a visualized way.

关键词： Self-healing Self-reporting Polyurethane Mechano-chromic Diselenide

Bischler-Napieralski Cyclization:A Versatile Reaction towards Functional Aza-PAHs and Their Conjugated Polymers

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Chinese Journal of Chemistry 2021年第11期39卷 3101-3112,3113-3114,3115页

作者： Mengwei Li Yuan Yuan yulan chen Institute of Molecular Plus Department of ChemistryTianjin UniversityTianjin300354 China

Nitrogen atom doped polycyclic aromatic hydrocarbons,the so-called aza-PAHs,and their conjugated polymers are applicable as functional chromophores and organic *** developments of PAHs and heterocyclic chemistry have been made possible by considerable improvements in synthetic methodologies,among which one-step reactions leading directly to an aza-conjugated ring are highly ***-Napieralski cyclization,an old yet efficient reaction,can accomplish this *** the last ten years,this reaction has been successfully used to synthesize a great variety of aza-PAHs *** combination with polymer chemistry is able to provide the corresponding *** feature article summarizes the up-to-data advances,mainly achieved by our groups,on the design and synthesis of new and well-tailored aza-PAHs and macromolecular architectures using Bischler-Napieralski cyclization as the key ***,the versatile applications of these functional materials in the fields of chemosensors,optoelectronic devices,and biomolecular probes are also covered in detail.

关键词： Bischler-Napieralski cyclization Aza-PAHs Conjugated polymers Fluorescence Nitrogen heterocycles Synthetic methods

Flexible Broadband Light Absorbers with a Superhydrophobic Surface Fabricated by Ultraviolet-assisted Nanoimprint Lithography

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Chemical Research in Chinese Universities 2022年第3期38卷 829-833页

作者： WEI Wanyuan LI Mengwei chen yulan Department of Chemistry Tianjin UniversityTianjin100354P.R.China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun130012P.R.China

We present a simple approach to fabricate a kind of composite films with a superhydrophobic and broadband light absorbing surface by ultraviolet-assisted nanoimprinting over a gradiently deposited composite *** wettability and optical property of the resultant surfaces are tunable by the deposition time before polymerization(T_(s))and mold’s *** robust and elastomeric films exhibiting high sunlight absorptivity up to 98.13%and contact angle of their surfaces up to 150°are prepared under optimized conditions,as using a mold with a small pattern size(hexagonal periodic mold with cylinder diameter of ca.37μm)under T_(s)=10 min for imprinting the crosslinked poly[di(ethylene glycol)ethyl ether acrylate]and poly(isobornyl acrylate)in the presence of polypyrrole(PPy)*** dual functions are found related to the hierarchical architecture of the surface,arising from the synergetic effects of the periodical patterned polymer substrate and spontaneously assembled PPy microstructures on the *** current strategy based on the combination of ultraviolet-assisted nanoimprint lithography and hierarchical assembly of gradiently deposited black nano-fillers offers a new insight into the design of robust superhydrophobic and black surfaces,which is helpful to deepen our understanding of the relationship between liquid/light manipulation and micro/nanostructured surfaces.

关键词： Superhydrophobic surface Black absorber Composite film Ultraviolet-assisted nanoimprint lithography Hierarchical microstructure

Bioassay of Carcinoembryonic Antigens by Organic Field-effect Transistors Based on D-A Type Conjugated Polymer

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Chemical Research in Chinese Universities 2023年第6期39卷 877-883页

作者： LYU Xiaomeng DUAN Yuchen chen yulan chenG Shanshan Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryTianjin UniversityTianjin 300354P.R.China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012P.R.China

Biosensors based on organic field-effect transistors(OFETs)are one of the most promising electronic devices for emerging bioanalytical *** selection of organic semiconductors(OSCs)is essential to improve the sensitivity and reliability of this kind of *** the good field effect performance and tunable structures of D-A type conjugated polymers,here,we design two D-A type copolymers[P(BDT-co-DPP2T-ThC_(2))and P(BDT-co-DPP2T-Th)],which are applied as the OSC *** carcinoembryonic antigen antibody(anti-CEA)adsorbed onto the OSC layers as the recognition sites,OFETs based biosensors for CEA detection are *** experimental findings support that the attachment of ester side groups onto the polymer backbone[as for P(BDT-co-DPP2T-ThC_(2))]is favorable for improved solubility and filming properties of the *** introduction of ester side groups affects molecular stacking and enhances intermolecular *** resultant devices show high charge mobility and antibody adsorption ability,both of which are critical for sensitive and facile detection of CEA *** reliable determination of CEA down to the picomolar level is *** is expected that this kind of biosensors fabricated by D-A type conducting polymers will open new avenues toward the early diagnosis,real-time monitoring and treatment of future cancer diseases.

关键词： Organic field-effect transistor Conjugated polymer Carcinoembryonic antigen Biosensor Semiconductor

Thermal- and Light-driven Metathesis Reactions Between Different Diselenides

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Chemical Research in Chinese Universities 2022年第2期38卷 516-521页

作者： KANG Xiaoying YUAN Yuan XU Huaping chen yulan Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryTianjin UniversityTianjin 300354P.R.China Key Laboratory of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084P.R.China

Thermal- and light-driven diselenide metathesis reactions with different types of diselenides are investigated systematically. Their exchange reaction rates and equilibrium conversions are compared in the aspects of the different diselenide structures, activation conditions and solvents. As a result, the metathesis reactions between diselenide small molecules are demonstrated with high dynamic and sensitive features, which can be broadly tuned by varying the electron affinity and aromaticity of the diselenide substituents and external conditions(e.g., solvent, stimulus mode). The current work thus will not only advance our understanding on diselenide metathesis chemistry, but also promote concrete and impactful studies in selenium-containing materials.

关键词： Dynamic covalent bond Metathesis Diselenide

A hexaazatriphenylene fused large discotic polycyclic aromatic hydrocarbon with selective and sensitive metal-ion sensing properties

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Chinese Chemical Letters 2021年第12期32卷 3837-3840页

作者： Wenxiu Qu Wei Yuan Mengwei Li yulan chen Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistryInstitute of Molecular PlusTianjin UniversityTianjin 300072China

A HAT based large PAH discotic molecule PN_(8)is developed. The enlarged chromophoric core and doping heteroatoms enable colorimetric and fluorometric sensing of Cu^(2+)and Zn^(2+)with highly appreciable optical changes, good selectivity and low detection limit. Moreover, PN_(8)was demonstrated as an excellent adsorbent to remove Cu^(2+)and Zn^(2+)from wastewater.

关键词： Hexaazatriphenylene Ion adsorption Ion sensing Polycyclic aromatic hydrocarbons Self-assembly

Penetrance estimation of PRRT2 variants in paroxysmal kinesigenic dyskinesia and infantile convulsions

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Frontiers of Medicine 2021年第6期15卷 877-886页

作者： yulan chen Dianfu chen Shaoyun Zhao Gonglu Liu Hongfu Li Zhi-Ying Wu Department of Neurology and Research Center of Neurology in Second Affiliated Hospital and Key Laboratory of Medical Neurobiology of Zhejiang ProvinceZhejiang University School of MedicineHangzhou310009China Department of Neurology Huashan HospitalShanghai Medical CollegeFudan UniversityShanghai200040China

Proline-rich transmembrane protein 2(PRRT2)is the leading cause of paroxysmal kinesigenic dyskinesia(PKD),benign familial infantile epilepsy(BFIE),and infantile convulsions with choreoathetosis(ICCA).Reduced penetrance of PRRT2 has been observed in previous studies,whereas the exact penetrance has not been evaluated *** objective of this study was to estimate the penetrance of PRRT2 and determine its influencing *** screened 222 PKD index patients and their available relatives,identified 39 families with pathogenic or likely pathogenic(P/LP)PRRT2 variants via Sanger sequencing,and obtained 184 PKD/BFIE/ICCA families with P/LP PRRT2 variants from the *** was estimated as the proportion of affected variant ***2 penetrance estimate was 77.6%(95%confidence interval(CI)74.5%–80.7%)in relatives and 74.5%(95%CI 70.2%–78.8%)in obligate *** addition,we first observed that penetrance was higher in truncated than in non-truncated variants(75.8%versus 50.0%,P=0.01),higher in Asian than in Caucasian carriers(81.5%versus 68.5%,P=0.004),and exhibited no difference in gender or parental *** results are meaningful for genetic counseling,implying that approximately three-quarters of PRRT2 variant carriers will develop PRRT2-related disorders,with patients from Asia or carrying truncated variants at a higher risk.

关键词： penetrance PRRT2 paroxysmal kinesigenic dyskinesia infantile convulsions

Circularly Polarized Luminescence from Chiral p-Terphenylene-Based Supramolecular Aggregates

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Chinese Journal of Chemistry 2021年第8期39卷 2095-2100页

作者： Titi Xie Wei Yuan Xiaopei Li Mengwei Li yulan chen Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryInstitute of Molecular PlusTianjin UniversityTianjin 300354China

Circularly polarized luminescent(CPL)materials with intense emission and high luminescenee dissymmetry factor(gjum)are highly desirable for their promisi ng applicati ons in comm un icatio n tech no logies,nano tech n... 详细信息

关键词： Circularly polarized luminescence p-Terphenylene Self-assembly Gels Chirality

Covalently Cross-Linked and Mechanochemiluminescent Polyolefins Capable of Self-Healing and Self-Reporting

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CCS Chemistry 2021年第5期3卷 1316-1324页

作者： Yakui Deng Yuan Yuan yulan chen Tianjin Key Laboratory of MolecularOptoelectronic Science Department of ChemistryTianjin UniversityTianjin 300354

Compared with non-cross-linked and dynamically covalent polymers,covalently cross-linked networks are irreplaceableinmany areas;however,they aredifficult to repair once fractured,due to limited polymer chain diffusion after ***,the authors have reported a newkind of permanently cross-linked polyolefin,which when attached with amide side groups,yieldmechanically robust yet readily repairablematerials.A key is to use low cross-linking density,which enables satisfactory elasticity and chain mobility for thermodynamically favored *** key is to incorporate dense hydrogen bonds that can undergo reversible *** factors jointly promise polyolefin networks with good mechanical properties and self-healing performance(recovered spontaneously up to 96%of its original tensile strength).More importantly,by means of mechanochemiluminescence from 1,2-dioxetane,which serves as the cross-linker and built-in self-reporting stress probe,a microscopic evaluation of how the chain entanglement proceeds upon healing and how failure occurs in the network can be obtained.

关键词： self-healing self-reporting polyolefins covalently cross-linked mechanochemiluminescence