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第八届高分子化学国际学术研讨会

作者： Zhiqiang Fan Feng He Zhisheng Fu Liang Zhu Dandan Zang Yintian Guo Dan Wang Qisheng Zhang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering

α-Diimine Ni（II）and Pd（II）catalysts have been found to produce highly branched polyethylene（HBPE）via ethylene polymerization by Brookhart et al,and the branched chain structure was explained by chain-walking mechanism. The unique structure of HBPE makes it a potential elastomer with important ***,because of the rather poor thermal stability of the early typeα-diimine

关键词： DIIMINE NICKEL CATALYSTS FOR IMPROVING THERMAL STABILITY IN ETHYLENE CHAIN-WALKING POLYMERIZATION MODIFY

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Manipulation of the through-space interactions in diphenylmethane

Smart Molecules

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Smart Molecules 2023年第2期1卷 45-53页

作者： Weihao Tu Zuping Xiong Ziteng Zhang Jianyu Zhang Lei Wang Yuan Xie Yipu Wang Haoke Zhang Jing Zhi Sun Ben Zhong Tang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhouChina ZJU-Hangzhou Global Scientific and Technological Innovation Center HangzhouChina Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyHong KongChina Center for AIE Research College of Materials Science and EngineeringShenzhen UniversityShenzhenChina School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenChina

Through-space interaction(TSI)has been proven to play an important role in the newly emerging clusteroluminescence(CL)***,it is still a big challenge to manipulate the TSI at the molecular level due to the unclear relationship between the non-conjugated structure and TSI ***,the TSI in diphenylmethane is manipulated by breaking its symmetric structures and changing the isolated ***,the CL wavelength and efficiency of diphenylmethane are successfully regulated at the aggregate state.

关键词： clusteroluminescence diphenylmethane photophysics through-space interactions

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The synthesis of a Multiple D–A Conjugated Macrocycle and Its Application in Organic Photovoltaic

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Angewandte Chemie 2023年第48期135卷

作者： Wei Liu Dr. Huotian Zhang Songting Liang Dr. Tong Wang Siqing He Yunbin Hu Dr. Rui Zhang Dr. Haoqing Ning Dr. Jie Ren Prof. Artem Bakulin Prof. Feng Gao Dr. Jun Yuan Prof. Yingping Zou College of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China Department of Physics Chemistry and Biology Linköping University SE-581 83 Linköping Sweden Department of Chemistry and Centre for Processable Electronics Imperial College London W12 0BZ London United Kingdom MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X Pol-ymers Department of Polymer Science and Engineering Zhejiang University 310027 Hangzhou P. R. China

As a novel class of materials, D–A conjugated macrocycles hold significant promise for chemical science. However, their potential in photovoltaic remains largely untapped due to the complexity of introducing multiple donor and acceptor moieties into the design and synthesis of cyclic π-conjugated molecules. Here, we report a multiple D–A ring-like conjugated molecule ( RCM ) via the coupling of dimer molecule DBTP-C3 as a template and thiophenes in high yields. RCM exhibits a narrow optical gap (1.33 eV) and excellent thermal stability, and shows a remarkable photoluminescence yield ( Φ PL ) of 11.1 % in solution, much higher than non-cyclic analogues. Organic solar cell (OSC) constructed with RCM as electron acceptor shows efficient charge separation at donor-acceptor band offsets and achieves a power conversion efficiency (PCE) of 14.2 %-approximately fourfold higher than macrocycle-based OSCs reported so far. This is partly due to low non-radiative voltage loss down to 0.20 eV and a high electroluminescence yield ( Φ EL ) of 4×10 −4 . Our findings emphasize the potential of D–A cyclic conjugated molecules in advancing organic photovoltaic technology.

关键词： Donor-Acceptor Molecules Macrocycles Organic Photovoltaics Solar Cells

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Induced migration of endothelial cells into 3D scaffolds by chemoattractants secreted by pro-inflammatory macrophages in situ

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Regenerative Biomaterials 2017年第3期4卷 139-148页

作者： Xuguang Li Yuankun Dai Tao Shen Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Cell migration in scaffolds plays a crucial role in tissue regeneration,which can better mimic cell behaviors in *** this study,a novel model has been proposed on controlling 3D cell migration in porous collagen-chitosan scaffolds with various pore structures under the stimulation of inflammatory cells to mimic the angiogenesis *** cells(ECs)cultured atop the scaffolds in the Transwell molds which were placed into a well of a 24-well culture plate were promoted to migrate into the scaffolds by chemoattractants such as vascular endothelial growth factor(VEGF)and tumor necrosis factor-alpha(TNF-α)secreted by the pro-inflammatory macrophages incubated in the well culture *** phenotype of macrophages was mediated by 50 ng/ml interferongamma(IFN-c)and different concentrations of lipopolysaccharide(LPS,150–300 ng/ml).The cell migration depth had a positive correlation with LPS concentration,and thereby the TNF-a *** ECs migrated easier to a deeper zone of the scaffolds prepared at10C(187 lm in pore diameter)than that at20C(108 lm in pore diameter)as *** method provides a useful strategy to study the 3D cell migration,and is helpful to reveal the vascularization process during wound healing in the long run.

关键词： cell migration chemoattractants endothelial cells macrophages scaffolds

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Near-Infrared Emission Beyond 900 nm from Stable Radicals in Nonconjugated Poly(diphenylmethane)

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Angewandte Chemie 2024年第24期136卷

作者： Ziteng Zhang Zuping Xiong Dr. Jianyu Zhang Bo Chu Xiong Liu Weihao Tu Dr. Lei Wang Prof. Jing Zhi Sun Prof. Chengjian Zhang Prof. Haoke Zhang Prof. Xinghong Zhang Prof. Ben Zhong Tang Department of Polymer Science and Engineering Zhejiang University Hangzhou 310058 China State Key Laboratory of Motor Vehicle Biofuel Technology International Research Center for X Polymers Zhejiang University Hangzhou 310058 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Zhejiang University Hangzhou 310058 China Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 311215 China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study The Hong Kong University of Science and Technology Hong Kong 999077 China Centre of Healthcare Materials Shaoxing Institute Zhejiang University Shaoxing 312000 China School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong Shenzhen Guangdong 518172 China

Organic radicals with narrow energy gaps are highly sought-after for the production of near-infrared (NIR) fluorophores. However, the current repertoire of developed organic radicals is notably limited, facing challenges related to stability and low fluorescence efficiency. This study addresses these limitations by achieving stable radicals in nonconjugated poly(diphenylmethane) (PDPM). Notably, PDPM exhibits a well-balanced structural flexibility and rigidity, resulting in a robust intra-/inter-chain through-space conjugation (TSC). The stable radicals within PDPM, coupled with strong TSC, yield a remarkable full-spectrum emission spanning from blue to NIR beyond 900 nm. This extensive tunability is achieved through careful adjustments of concentration and excitation wavelength. The findings highlight the efficacy of polymerization in stabilizing radicals and introduce a novel approach for developing nonconjugated NIR emitters based on triphenylmethane subunits.

关键词： Through-space conjugation Near-infrared emission Radicals Nonconjugated polymers

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Recent Advances in Oral and Transdermal Protein Delivery Systems

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Angewandte Chemie 2022年第10期135卷

作者： Dr. Yinxian Yang Dr. Ruyi Zhou Yanfang Wang Prof. Yuqi Zhang Prof. Jicheng Yu Prof. Zhen Gu Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems College of Pharmaceutical Sciences Zhejiang University Hangzhou 310058 China Department of Burns and Wound Center Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China Liangzhu Laboratory Zhejiang University Medical Center Hangzhou 311121 China Jinhua Institute of Zhejiang University Jinhua 321299 China Department of General Surgery Sir Run Run Hospital School of Medicine Zhejiang University Hangzhou 310016 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

Protein and peptide drugs are predominantly administered by injection to achieve high bioavailability, but this greatly compromises patient compliance. Oral and transdermal drug delivery with minimal invasiveness and high adherence represent attractive alternatives to injection administration. However, oral and transdermal administration of bioactive proteins must overcome biological barriers, namely the gastrointestinal and skin barriers, respectively. The rapid development of new materials and technologies promises to address these physiological obstacles. This review provides an overview of the latest advances in oral and transdermal protein delivery, including chemical strategies, synthetic nanoparticles, medical microdevices, and biomimetic systems for oral administration, as well as chemical enhancers, physical approaches, and microneedles in transdermal delivery. We also discuss challenges and future perspectives of the field with a focus on innovation and translation.

关键词： Biological Barriers Drug Delivery Proteins and Peptides Oral Administration Transdermal Delivery

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Solution-processed CuOx as an efficient hole-extraction layer for inverted planar heterojunction perovskite solar cells

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Chinese Chemical Letters 2017年第1期28卷 13-18页

作者： Zhi-Kai Yu Wei-Fei Fu Wen-Qing Liu Zhong-Qiang Zhang Yu-Jing Liu Jie-Lin Yan Tao Ye Wei-Tao Yang Han-Ying Li Hong-Zheng Chen State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

A solution-processed CuOx film has been successfully integrated as the hole-transporting layer（HTL） for inverted planar heterojunction perovskite solar cells（PVSCs）. The CuOx layer is fabricated by simply spin-coating a copper acetylacetonate（Cu（acac）2） chloroform solution onto ITO glass with high transparency in the visible range. The compact and pinhole-free perovskite film with large grain domains is grown on the CuOx film. The inverted PVSCs with the structure of ITO/CuOx/MAPbI3/PC（61）BM/ZnO/Al are fabricated and show a best PCE of 17.43% under standard AM 1.5G simulated solar irradiation with a VOCof 1.03 V, aJ（SC） of 22.42 mA cm^（-2）, and a fill factor of 0.76, which is significantly higher and more stable than that fabricated from the often used hole-transporting material PEDOT：PSS（11.98%） under the same experimental conditions. The enhanced performance is attributed to the efficient hole extraction through the CuOx layer as well as the high-quality CH3NH3PbI3 films grown on the CuOx. Our results indicate that low-cost and solution-processed CuOx film is a promising HTL for high performance PVSCs with better stability.

关键词： CuOx Solution-processing Hole-transporting layer Perovskite solar cells Stable

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Organic functional materials based buffer layers for efficient perovskite solar cells

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Chinese Chemical Letters 2017年第3期28卷 503-511页

作者： Fateh Ullah Hongzheng Chen Chang-Zhi Li MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon Materials Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

In this review, we highlight the recent development of organic π-functional materials as buffer layers in constructing efficient perovskite solar cells（PVSCs）. By following a brief introduction on the PVSC development, device architecture and material design features, we exemplified the exciting progresses made in field by exploiting organic π-functional materials based hole and electron transport layers（HTLs and ETLs） to enable high-performance PVSCs.

关键词： Perovskite solar cells Organic functional material Hole transport layer Electron transport layer Power conversion efficiency

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Self-assembled vesicles to deliver bioactive macromolecules for cancer immunotherapy

Self-assembled vesicles to deliver bioactive macromolecules ...

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The 3rd International Conference on Nanomedicine of China（ChinaNanomedicine 2018）

作者： Liyan Qiu Yan Peng MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University

Polymersomes have attracted growing attention as promising carriers in the application of cancer therapy since they appear like liposomes but with more tunable *** group previously constructed some kinds of polymersomes as carriers for small-molecule chemotherapeutic drugs with high loading content and *** study tried the application of self-assembled polyphosphazene vesicles for delivering biomacromolecules such as plasmids and proteins for cancer *** synthesised amphiphilic polyphosphazenes PEDP with PEG2000 as hydrophilic chains and N,N-diisopropylethylenediamine(DPA) as hydrophobic side *** polymersomes are capable of loading interleukin 12 plasmid(pmIL-12) by physical *** vivo anti-tumor test on the mouse xenograft colon carcinoma(CT-26) showed that pmIL-12 loaded polymersomes significantly suppressed tumor ***,antigen-ovalbumin(OVA) protein can also be loaded into PEDP polymersomes through mild dialysis process with a high loading capacity of 5%(the loading efficiency was more than 80%).The pharmacological experiment showed Th1-dominant anti-tumor immune response was induced and prophylactic vaccination of polymersomes inhibited the tumor formation in *** conclusion,these results demonstrated the potential of polyphosphazene-based vesicles as nanoscale delivery systems for biomacromolecules.

关键词： Self-assembled vesicles to deliver bioactive macromolecules for cancer immunotherapy

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Toward Highly Thermal Stable Perovskite Solar Cells by Rational Design of Interfacial Layer

SSRN

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SSRN 2019年

作者： Yang, Weitao Zhong, Danming Shi, Minmin Qu, Shaoxing Chen, Hongzheng State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China State Key Laboratory of Fluid Power & Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Department of Engineering Mechanics Center for X-Mechanics Zhejiang University Hangzhou310027 China

Heat plays an important role in the long term stability of perovskite solar cells (PVSCs) in practical application. Herein, thermal stability of PVSCs based on two most used types of interfacial layer materials, metal oxide (MO) and polymer (P), was investigated. Firstly, chemical decomposition behavior of MO-based and P-based perovskite films was characterized via X-ray diffraction and analyzed by chemical kinetics theory, revealing that chemically active MO would accelerate the decomposition of methylamine lead iodide (MAPbI3) perovskite into lead iodide (PbI2). Secondly, thermal-induced stress, resulting from the mismatched thermal expansion coefficients of different layers of PVSCs, and its effect on the mechanical stability of perovskite films were studied. By combining experiment and simulation simultaneously, we come into a consistent conclusion that "soft" (low modulus) and thick (with thickness over 20 nm) polymer interfacial layer materials offer better relaxation of thermal-induced stress. As a result, PVSCs employing a thick polymer interfacial layer offer a remarkably improved thermal stability compared with those employing MO-based or thin P-based interfacial layer. In a word, this work offers not only the degradation insight of the perovskite films based on different substrates, but also the path toward highly thermal stable PVSCs by rational design of interfacial layer materials. © 2019, The Authors. All rights reserved.

关键词： Perovskite solar cells

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