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Heavy-atom engineered hypoxia-responsive probes for precisive photoacoustic imaging and cancer therapy

Chinese Chemical Letters 2024年第4期35卷 316-320页

作者： Ling-Ling Wu xiangchuan meng Qingyang Zhang Xiaowan Han Feiya Yang Qinghua Wang Hai-Yu Hu Nianzeng Xing Department of Urology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China State Key Laboratory of Bioactive Substances and Function of Natural Medicine Institute of Materia MedicaPeking Union Medical College and Chinese Academy of Medical SciencesBeijing 100050China

Photoacoustic agents combining photodynamic therapy(PDT) and photothermal therapy(PTT) functions have emerged as potent theranostic agents for combating cancer. The molecular approaches for enhancing the near-infrared(NIR)-absorption and maximizing non-radiative energy transfer are essential for effective photoacoustic imaging(PAI) and therapy applications. In addition, such molecules with high specificity and affinity to cancer cells are urgently needed, which would further decrease the side effect during treatments. In this study, we applied a heavy-atom engineering strategy and introduced p-aminophenol,-thio, and-seleno moieties into NIR heptamethine cyanine(Cy7) skeleton(Cy7-X-NH_(2), X = O, S, Se) to significantly increase photothermal conversion efficiency for PTT and promote intersystem crossing for ***, we designed a series of nitroreductase(NTR)-activated photoacoustic probes(Cy7-X-NO_(2),X = O, S, Se), and target hypoxic tumors with NTR overexpression. Our prostate cancer targeting probe,Cy7-Se-NO_(2)-KUE, exhibited specific tumor photoacoustic signals and effective tumor killing through outstanding synergistic PTT/PDT in vivo. These findings highlighted a versatile strategy for cancer photoacoustic diagnosis and enhanced phototherapy.

关键词： Heavy-atom effect Phototherapy Photoacoustic imaging Hypoxia-responsive Prostate cancer

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砂土中筒型基础临界吸力计算方法研究

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太阳能学报 2024年第6期45卷 599-606页

作者：郭炳川孟祥传杨林林李红涛梁超刘润中国船级社海洋工程技术中心天津 300457 天津大学水利工程智能建设与运维全国重点实验室天津 300072

开展砂土中筒型基础吸力沉贯的系列模型试验,测试筒型基础下沉过程中吸力的发挥过程,并通过反分析得出筒内外土体渗透系数比的变化规律.结果表明:当筒内土体出现管涌现象时,筒内负压会瞬间降低;随着沉贯深度的增加,临界吸力值也逐渐增大... 详细信息

开展砂土中筒型基础吸力沉贯的系列模型试验,测试筒型基础下沉过程中吸力的发挥过程,并通过反分析得出筒内外土体渗透系数比的变化规律.结果表明:当筒内土体出现管涌现象时,筒内负压会瞬间降低;随着沉贯深度的增加,临界吸力值也逐渐增大;此外,筒内外土体的渗透系数比呈指数函数型增长;假设在沉贯过程中土体的渗透系数不变,则临界吸力的预测结果均小于实测值.根据试验结果改进砂土中筒型基础沉贯过程临界吸力的计算公式,并进行工程案例验证.

关键词：海上风电筒型基础吸力沉贯临界吸力渗流减阻

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The issues on the commercialization of perovskite solar cells

Materials Futures

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Materials Futures 2024年第2期3卷 1-35页

作者： Lixiu Zhang Yousheng Wang xiangchuan meng Jia Zhang Pengfei Wu Min Wang Fengren Cao Chunhao Chen Zhaokui Wang Fu Yang Xiaodong Li Yu Zou Xi Jin Yan Jiang Hengyue Li Yucheng Liu Tongle Bu Buyi Yan Yaowen Li Junfeng Fang Lixin Xiao Junliang Yang Fuzhi Huang Shengzhong Liu Jizhong Yao Liangsheng Liao Liang Li Fei Zhang Yiqiang Zhan Yiwang Chen Yaohua Mai Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632People’s Republic of China Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031People’s Republic of China School of Information Science and Technology Fudan UniversityShanghai 200433People’s Republic of China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072People’s Republic of China School of Physical Science and Technology Soochow UniversitySuzhou 215006People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Institute of optoelectronics Fudan UniversityShanghai 200433People’s Republic of China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123People’s Republic of China School of Physics and Electronic Science East China Normal UniversityShanghai 200241People’s Republic of China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Department of PhysicsPeking UniversityBeijing 100871People’s Republic of China College of Biophotonics South China Normal UniversityGuangzhou 510631People’s Republic of China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Physics and Electronics Central South UniversityChangsha 410083People’s Republic of China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Microquanta semiconductor Hangzhou 311121People’s Republic of China

Perovskite solar cells have aroused a worldwide research upsurge in recent years due to their soaring photovoltaic performance,ease of solution processing,and low *** power conversion efficiency record is constantly being broken and has recently reached 26.1%in the lab,which is comparable to the established photovoltaic technologies such as crystalline silicon,copper indium gallium selenide and cadmium telluride(CdTe)solar ***,perovskite solar cells are standing at the entrance of industrialization,where huge opportunities and risks ***,towards commercialization,challenges of up-scaling,stability and lead toxicity still remain,the proper handling of which could potentially lead to the widespread adoption of perovskite solar cells as a low-cost and efficient source of renewable *** review gives a holistic analysis of the path towards commercialization for perovskite solar cells.A comprehensive overview of the current state-of-the-art level for perovskite solar cells and modules will be introduced first,with respect to the module efficiency,stability and current status of *** will then discuss the challenges that get in the way of commercialization and the corresponding strategies to address them,involving the upscaling,the stability and the lead toxicity *** into the future direction of commercialization of perovskite photovoltaics was also provided,including the flexible perovskite cells and modules and perovskite indoor ***,the future perspectives towards commercialization are put forward.

关键词： commercializations perovskite solar cells state-of-the-art level challenges and perspectives indoor photovoltaics

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Large-area Flexible Organic Solar Cells: Printing Technologies and Modular Design

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Chinese Journal of Polymer Science 2022年第12期40卷 1522-1566,I0006页

作者： xiangchuan meng Zhi Xing Xiaotian Hu Yiwang Chen College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031China Institute of Advanced Scientific Research(iASR)/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal UniversityNanchang 330022China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

Flexibility is the most prominent advantage of organic solar cells(OSCs) compared with traditional photovoltaic devices, showing an irreplaceable commercial potential. Currently, the maximum power conversion efficiencies(PCEs) of single-junction OSCs have been over 19% and 16% upon rigid and flexible substrates, respectively, which meet the criteria for commercial application. Extensive research efforts are under way, such as device configuration design, interface/photosensitive layer synthesis, transparent electrode modification and printing technology innovation, however, the reasonable selection of printing technologies, the huge performance loss of large-area printing process and the structural design of flexible modules are still the bottlenecks, limiting the commercialization of OSCs. This review focuses on the technical challenges and rational modular configuration design for printing preparation of flexible high-efficiency large-area organic devices, from the aspects of the functional layer material selection, printing process research status and large-scale efficiency losses. These will promote the integrated applications of printable organic semiconductor materials for next-generation clean energy and appeal extensive attentions in wearable electronics, building-integrated photovoltaics and Internet of Things, etc.

关键词： Organic photovoltaic Printing technology Flexible device Modular design

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Atmospheric stable and fexible Sn-based perovskite solar cells via a bioinspired antioxidative crystal template

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Journal of Energy Chemistry 2022年第3期31卷 612-618,I0016页

作者： Rui Guo Li Rao Qianjin Liu Hongyu Wang Chenxiang Gong Baojin Fan Zhi Xing xiangchuan meng Xiaotian Hu School of Materials Science and Engineering Nanchang University999 Xuefu AvenueNanchang 330031JiangxiChina School of Future Technology Nanchang University999 Xuefu AvenueNanchang 330031JiangxiChina Institute of Polymers and Energy Chemistry Nanchang University999 Xuefu AvenueNanchang 330031JiangxiChina

Sn-based perovskite solar cells(PSCs)demonstrate a potential development in eco-friendly devices due to their ***,poor stability and crystalline quality are still the challenges for achieving high-performance and long-term operating *** this work,inspired by biological protein,nickelporphyrin(Ni-P)with electron cloud on conjugate ring is applied into Sn-based perovskite to prevent perovskite from being *** synergistic effect of water and oxygen is broken in grain boundaries and surface so that the stability of PSCs can be improved obviously,despite there is hardly any barrier for water to ***,the electron-rich molecules can passivate the defects of perovskite such as iodine ***,the ester group in Ni-P molecule can bind with SnI;to form complex and then restrain *** with the template effect of 2D molecular,the crystallization of perovskite films is ***,the Sn-based PSCs with Ni-P achieve a stabilized power conversion efficiency(PCE)of 7.79%with negligible hysteresis in fexible devices,***,the PSCs can maintain 80%of the pristine PCE after 300 h under air environment.

关键词： Lead-free Solar cell Flexible devices Molecular bionics Crystallization control

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一种通用静电组装策略用于印刷无机纳米颗粒及其在大面积钙钛矿太阳电池中的应用

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Science China Materials 2024年第5期67卷 1602-1611页

作者：李文杰褚昭阳李豪杰李丰邢直范宝锦孟祥川余德见梁超章少华胡笑添陈义旺 College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry(IPEC)/Film Energy Chemistry for Jiangxi Provincial Key Laboratory(FEC) Nanchang University999 Xuefu AvenueNanchang330031China Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University99 Ziyang AvenueNanchang330022China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao999078China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an710049China Peking University Yangtze Delta Institute of OptoelectronicsNantong226010China

无机纳米颗粒作为一种极具前景的材料,在钙钛矿太阳电池的传输层中得到了广泛应用.然而,无机纳米颗粒易于聚集的特性阻碍了其进一步的发展.在大面积制备过程中,无机纳米颗粒的聚集加剧了“咖啡环效应”,导致薄膜不均匀,使得底部界面性... 详细信息

无机纳米颗粒作为一种极具前景的材料,在钙钛矿太阳电池的传输层中得到了广泛应用.然而,无机纳米颗粒易于聚集的特性阻碍了其进一步的发展.在大面积制备过程中,无机纳米颗粒的聚集加剧了“咖啡环效应”,导致薄膜不均匀,使得底部界面性能较差,进而影响钙钛矿薄膜的结晶,最终导致整个器件性能下降.为解决这一问题,我们将一种带电聚合物一一聚乙烯亚胺引入至无机纳米颗粒溶液中.聚乙烯亚胺的带电性质对无机纳米颗粒的聚集起到了显著的抑制作用,此外,添加聚乙烯亚胺还增加了无机纳米颗粒溶液的粘度,有助于减少薄膜上的负面咖啡环效应.最终,我们在基于1-cm^(2)正式结构且使用SnO_(2)传输层的器件上实现了23.2%的光电转换效率.为进一步证明这一策略的普适性,我们还将此策略验证基于NiO_(x)传输层的1-cm^(2)反式器件,其转换效率超过20%.

关键词： perovskite solar cells inorganic nanoparticles large-area device electrostatic assembly technique

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Selection of Functional Spacer Cations for Efficient 2D/3D Perovskite Solar Cells

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CCS Chemistry 2023年第4期5卷 781-801页

作者： Dengxue Li Zhi Xing xiangchuan meng Xiaotian Hu Ting Hu Yiwang Chen College of Chemistry and Chemical Engineering Institute of Polymers and Energy Chemistry(IPEC)Nanchang UniversityNanchang 330031 National Engineering Research Center for Carbohydrate Synthesis Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationJiangxi Normal UniversityNanchang 330022 Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010 Department of Polymer Materials and Engineering School of Physics and Materials ScienceNanchang UniversityNanchang 330031

In recent years,perovskite solar cells(PSCs)have gone through unparalleled rapid expansion and become a candidate for solar *** various PSCs,though typical three-dimensional(3D)halide perovskite-based PSCs deliver the highest efficiency,they are subjected to severe instability,which constrains their *** comparison,two-dimensional(2D)PSCs have aroused widespread concern due to their superior *** that,2D/3D perovskite materials combining high efficiency and good stability have emerged as the times require,which are expected to bring about stable and efficient ***,this review focuses on selection of functional spacer cations for efficient and stable 2D/3D ***,the unique function of different spacer groups and the selection of appropriate spacer cations in 2D perovskites is summarized and ***,by selecting appropriate cations,the role of 2D perovskites is elaborated,including energy level regulation,ion migration suppression,defect passivation,residual stress release and improved *** addition,the preparation methods of 2D/3D perovskites are comprehensively ***,current challenges and future opportunities for the further development of 2D/3D perovskites for solar cells are discussed and prospected.

关键词： 2D/3D perovskites spacer cations high efficiency stability defect passivation

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DR3TBDTT Based Ternary Blends Containing Conjugated Polymers： Crystallization Determines Morphology and Performance

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Chinese Journal of Chemistry 2018年第5期36卷 437-442页

作者： Jingping Yin Weihua Zhou Qingyun Ai xiangchuan meng Siqi Liu Zoukangning Yu Jianrong Zeng Yiwang Chen College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang Jiangxi 330031 China School of Materials Science and Engineering Nanchang University 999 Xuefu Avenue Nanchang Jiangxi 330031 China Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

How the conjugated polymers affect the crystallization of DR3TBDTT, in addition to the corresponding morphology and performance, is not well understood. In this work, the weakly crystalline polymer PTB7-Th and highly crystalline polymers of PCDTBT and P3HT were incorporated into DR3TBDTT：PC71BM system to investigate the variation of crystallization, morphology and performance. It is demonstrated that PTB7-Th is the most effective additive to improve the PCE value of DR3TBDTT：PC71BM to 5.7%, showing the nucleating agent reducing the crystallization correlation length （CCL） value of DR3TBDTT from 18.7 nm to 17.0 rim, in addition to the optimized morphology. In contrast, the PCDTBT and P3HT could induce the crystallization of DR3TBDTT, leading to much higher CCL value as well as obvious phase separation. Despite of energy level alignment, the crystallization of DR3TBDTT influenced by polymers determines the corresponding morphology of active layers and photovoltaic performance.

关键词： crystallization morphology ternary blends organic solar cells

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First Record of Cyclocarya from the Early Oligocene Qaidam Basin,North Tibet:Implications for the Paleogeography and Paleoecology

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Journal of Earth Science 2024年第1期35卷 201-211页

作者： Yafei Hou Bowen Song xiangchuan Li Fang Han Xu Zhang Kexin Zhang Institute of Geological Survey China University of GeosciencesWuhan 430074China Faculty of Materials Science and Chemistry China University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China College of Earth Sciences and Resources&Key Laboratory of Western Mineral Resources and Geological Engineering of the Ministry of Education Chang'an UniversityXi'an 710054China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China School of Earth Sciences East China University of TechnologyNanchang 330013China

As the largest intermontane basin in the northeastern Tibetan Plateau(TP),the Qaidam Basin provides unique insight into paleoclimatic change and its relationship with global change and uplift on the *** this study,based on morphological comparison,fossil fruit of Cyclocarya from the Early Oligocene Shangganchaigou Formation in the Qaidam Basin is assigned as Cyclocarya *** discovery of Cyclocarya *** demonstrates the occurrence of Cyclocarya in the Oligocene sediment in Qaidam *** is the first record of Cyclocarya fossil of Early Oligocene Age in China and indicates that Cyclocarya has existed on the northeastern TP since at least the Early *** living analogues of the current fossil now lives in sub-tropical China,where the East Asian Monsoon is *** the new fossils and previously reported fossil remains of plants and fishes,it can be inferred that the Early Oligocene Qaidam Basin was primarily influenced by westerly circulation and had a relatively warm and humid climate,which was in sharp contrast to the present-day climate in Qaidam Basin.

关键词： biostratigraphy climate change winged-fruit fossil Qaidam Basin Early Oligocene paleoclimate paleogeography

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单筒多舱筒型基础临界吸力与需要吸力计算方法研究

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太阳能学报 2023年第4期44卷 29-37页

作者：马文冠刘润孟祥传练继建天津大学水利工程仿真与安全国家重点实验室天津300072 中国华能集团清洁能源技术研究院有限公司北京102209

针对单筒多舱筒型基础中舱压力小于边舱工况,研究其沉放过程渗流场特性;分析舱压比和中舱相对尺寸对临界吸力的影响,建立可考虑舱压比和中舱尺寸的临界吸力计算方法;分析舱压比对减小摩阻力与端阻力的影响规律,并基于有效应力原理建立... 详细信息

针对单筒多舱筒型基础中舱压力小于边舱工况,研究其沉放过程渗流场特性;分析舱压比和中舱相对尺寸对临界吸力的影响,建立可考虑舱压比和中舱尺寸的临界吸力计算方法;分析舱压比对减小摩阻力与端阻力的影响规律,并基于有效应力原理建立可考虑舱压比的沉放需要吸力的计算方法。

关键词：海上风电筒型基础临界吸力需要吸力舱压比中舱相对尺寸

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