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Composition, structure and mechanical properties of several natural cellular materials

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Chinese Science Bulletin 2007年第21期52卷 2903-2908页

作者： YIN Zuodong PAN ZeLin WANG Cai dong yuping OU YuXiang Beijing National Laboratory for Molecular Sciences (BNLMS) New Materials Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Beijing Institute of Technology Beijing 100081 China

The stem piths of sunflower, kaoliang and corn are natural cellular materials. In this paper, the contents of the compositions of these piths are determined and their cell shapes and structures are examined through scanning electron microscope (SEM) and optical microscope. Further research is conducted in the effects of the compositions and structures of the piths on the mechanical properties after testing the partial mechanical properties. The results show that the total cellulose, hemicelluloses and lignin content of each sample approaches 75% of the dry mass of its primary cell walls. With the fall of R value, a parameter relative to the contents of the main compositions, the flexibilities of the cellular piths de- scend while their stresses and rigidities increase. The basic cell shape making up the sunflower pith is approximately a tetrakaidehedron. The stem piths of kaoliang and corn are made up of cells close to hexangular prisms and a few tubular ones which can observably reinforce their mechanical properties in the axial directions.

关键词：天然泡沫合成物机械特征天然泡沫材料

Conformational sensitivity of tetraphenyl-1,3-butadiene derivatives with aggregation-induced emission characteristics

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Science China Chemistry 2019年第10期62卷 1393-1397页

作者： Yahui Zhang Huanyu Xu Weiquan Xu Chen Zhang Jianbing Shi Bin Tong Zhengxu Cai yuping dong Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of Technology

Organic dyes with conformational sensitivity can be used to probe weak interactions at the molecular ***,three molecules based on tetraphenyl-1,3-butadienes(TPBs)were synthesized and studied with respect to their synthesis,structural characterization and potential *** TPBs showed aggregation-induced emission(AIE)characteristics and sensitive conformational properties,in which the emission wavelengths could be changed in different *** TPBs single crystals revealed that the phenyl groups at the 4-position of the 1,3-butadienes contributed to their conformational ***,the potential application for monitoring the interactions among polyelectrolyte complexes and metal ions was explored,and the results showed that TPBs could be used for sensitively probing some weak interactions by changing the emission wavelengths due to their conformation-sensitive *** may become a new star in AIE research fields.

关键词： tetraphenyl-1 3-butadienes(TPBs) aggregation-induced emission(AIE) polyelectrolyte complexes(PEC) conformational sensitivity

Anthracene Modified by Aldehyde Groups Exhibiting Aggregation-Induced Emission Properties

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Chinese Journal of Chemistry 2016年第11期34卷 1071-1075页

作者： Zhe Peng Zhi Wang Bin Tong Yingchun Ji Jianbing Shi Junge Zhi yuping dong Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China School of Chemistry Beijing Institute of Technology Beijing 100081 China

In order to get an easy way to achieve the transformation from aggregation-caused quenching luminophores （ACQphores） to aggregation-induced emission luminogens （AIEgens）, we took aldehyde groups as the modifying group to decorate anthracene. The fluorescence performances of 9-anthraldehyde （AnA） and 9,10-anthracenedicarboxaldehyde （AnDA） in solution and aggregated state were studied. We found out that the aldehyde group can transform anthracene with aggregation-caused quenching properties to AIEgen. The single-crystal structures analy- sis of AnA and AnDA showed that their structure characteristics are responsible for the AIE properties of AnA and AnDA. On one hand, the aldehyde group can cause steric effects to lower intermolecular n-π packing style in aggregated state. On the other hand, intermolecular H-bonding interactions can restrict the intramolecular rotation and suppress internal charge transfer. These results may supply a new simple method for the transformation from ACQphores to AIEgens on the point of the molecular design.

关键词： aggregation-induced emission aldehyde group organic luminescent materials mechanism hydrogen-bonding

Aggregation-Induced Emission of Hexaphenyl-1,3-butadiene

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Chinese Journal of Chemistry 2015年第7期33卷 701-704页

作者： Yahui Zhang Lingwei Kong Jianbing Shi Bin Tong Junge Zhi Xiao Feng yuping dong School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China School of Chemistry Beijing Institute of Technology Beijing 100081 China

A new type of AlE molecules based on hexaphenyl-1,3-butadienes was reported with respect to the synthesis and characterization. This material exhibited different maximum emission wavelength and enhanced emission inten... 详细信息

关键词： aggregation-induced emission hexaphenyl-1,3-butadienes aggregate state phase transition

Electrospun Nanofibrous Materials for Wound Healing

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Advanced Fiber Materials 2020年第4期2卷 212-227页

作者： yuping dong Yuqi Zheng Keyan Zhang Yueming Yao Lihuan Wang Xiaoran Li Jianyong Yu Bin Ding State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of TextilesDonghua UniversityShanghai 201620China College of Materials Science and Engineering Donghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 200051China

Wound dressing materials which are capable of meeting the demands of accelerating wound closure and promoting wound healing process have being highly *** nanofibrous materials show great application potentials for wound healing owing to relatively large surface area,better mimicry of native extracellular matrix,adjustable waterproofness and breathability,and programmable drug delivery *** this review article,we begin with a discussion of wound healing process and current commercial wound dressing ***,we emphasize on electrospun nanofibrous materials for wound dressing,covering the efforts for controlling fiber alignment and morphology,constructing 3D scaffolds,developing waterproof-breathable membrane,governing drug delivery performance,and regulating stem cell ***,we finish with challenges and future prospects of electrospun nanofibrous materials for wound dressings.

关键词： Electrospun Wound dressings Waterproofness Breathability Drug delivery Stem cell therapy

Thylakoid engineered M2 macrophage for sonodynamic effect promoted cell therapy of early atherosclerosis

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Nano Research 2024年第4期17卷 2919-2928页

作者： Guanghao Wu Changwen Mu Qianru Zhao Yao Lei Ran Cheng Weidong Nie Jiamin Qu yuping dong Ruili Yang Haiyan Xie State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesChemical Biology CenterPeking UniversityBeijing 100191China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China School of Life Science Beijing Institute of TechnologyBeijing 100081China School of Stomatology Peking UniversityBeijing 100081China

Atherosclerosis is the most common cause of cardiovascular diseases that contribute to the major morbidity worldwide,but still lacking of effective treatment ***,a hybrid cell is constructed for the sonodynamic effect promoted cell therapy of early atherosclerosis by fusing M2 macrophages with thylakoid(TK)*** systemic administration,the obtained TK-M2 actively accumulates in the early atherosclerotic plaques,wherein M2 macrophages relieve the cholesterol accumulation and the inflammation in the foam ***,the TK membranes decorated on the M2 macrophages exhibit both type I and type II sonodynamic effects under ultrasound(US)activation,inducing the direct apoptosis of foam *** cooperation of M2 and TK leads to significant outcome in eliminating atherosclerotic plaques without obvious side-effects,providing a new avenue for atherosclerosis treatment.

关键词： atherosclerosis thylakoid ultrasound M2 macrophage

The Symbolic Meanings of Roses in Shakespeare’s Sonnets

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Sino-US English Teaching 2020年第8期17卷 239-247页

作者： dong yuping University of Shanghai for Science and Technology ShanghaiChina

The paper explores the symbolic meanings of roses in Shakespeare’s sonnets. In Shakespeare’s 154 sonnets, therose imagery is placed in a dominant position among all the other flower imagery. In general, rose is one of themost conventional images in the sonnet. But in addition to the traditional symbol of beauty and love, rose in thesonnet shows more symbolic meanings: a symbol of vitality and reproduction, a symbol of friendship and devotion,and a symbol of fidelity and immortality. The symbolic rose, to a great extent, reflects the Renaissance humanistShakespeare’s values and ideals of humanism. By successfully employing the rose imagery, Shakespeare extols thevirtues of reproduction, displays his faith in the immortality of his verse, and conveys the message of appreciatingand cherishing the beauty, goodness, and truth.

关键词： rose sonnet beauty reproduction immortality

Organic Host-Guest Materials with Bright Red Room-Temperature Phosphorescence for Persistent Bioimaging

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Chinese Journal of Chemistry 2023年第13期41卷 1575-1582页

作者： Yueyue Si Yeyun Zhao Wenbo Dai Shisheng Cui Peng Sun Jianbing Shi Bin Tong Zhengxu Cai yuping dong Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081 China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing100081 China

Organic room-temperature phosphorescence(RTP)materials have attracted immense attention in bioimaging due to their long emission lifetime and large Stokes *** materials with long emission wavelength can improve the penetration depth for ***,the design of red persistent RTP materials is still *** this study,a fused-ring structure has been proposed to effectively decrease the triplet energy level,thus extending the emission wavelength of *** addition,the fused-ring structure exhibits a high molar extinction coefficient(ɛ)and high luminescence efficiency due to the rigid structure.A new class of crystalline hosts(iminodibenzyl,IDB)are developed to stabilize the triplet excitons that are generated from the fused-ring *** maximum RTP wavelength of doping materials can reach 635 nm with a lifetime of 9.35 ***-disperse nanoparticles are successfully prepared for in vivo time-resolved bioimaging,which eliminates the background fluorescence interference from biological *** reveal a delicate design strategy for the construction of long-wavelength emissive RTP materials for high-resolution bioimaging.

关键词： Room-temperature phosphorescence Fused-ring systems Long-wavelength emission High-resolution bioimaging Luminescence Nanoparticles

Donor strategy for promoting nonradiative decay to achieve an efficient photothermal therapy for treating cancer

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Science China Chemistry 2021年第9期64卷 1530-1539页

作者： Fei Ren Zeshun Li Kai Li Xiaoyan Zheng Jianbing Shi Chen Zhang Heng Guo Bin Tong Lei Xi Zhengxu Cai yuping dong Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing100081China Shenzhen Key Laboratory of Smart Healthcare Engineering Department of Biomedical EngineeringSouthern University of Science and Technology(SUSTech)Shenzhen518055China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster Science of Ministry of EducationSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing100081China

Photothermal therapy(PTT)is emerging as an effective treatment for superficial carcinoma.A key challenge to the effectiveness of PTT is to develop photosensitizers with high photothermal conversion *** to address this challenge,we develop a series of multi-arylpyrrole derivatives with different donors that contain different multi-rotor structures to explore highly efficient PTT *** these multi-arylpyrrole derivatives,MAP4-FE nanoparticles with a small size of their donor groups and better-donating ability exhibit a high photothermal conversion efficiency(up to 72%)when they are encapsulated by an amphiphilic *** a result,the MAP4-FE nanoparticles have shown satisfactory PTTeffects on in vivo tumor eradication under the guidance of photoacoustic *** findings of this study provide significant insights for the development of high-efficiency PTT photosensitizers for cancer treatment by making full use of the nonradiative decay of small size donors as rotors.

关键词： aggregation-induced emission multi-arylpyrroles photothermal therapy photoacoustic imaging