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| 1 | Electron-phonon coupling-assisted universal red luminescence of o-phenylenediamine-based carbon dots显示文摘Due to the complex core-shell structure and variety of surface functional groups,the photoluminescence(PL)mechanism of carbon dots(CDs)remain unclear.o-Phenylenediamine(oPD),as one of the most common precursors for preparing red emissive CDs,has been extensively studied.Interestingly,most of the red emission CDs based on oPD have similar PL emission characteristics.Herein,we prepared six different oPD-based CDs and found that they had almost the same PL emission and absorption spectra after purifiication.Structural and spectral characterization indicated that they had similar carbon core structures but diffferent surface polymer shells.Furthermore,single-molecule PL spectroscopy confirmed that the multi-modal emission of those CDs originated from the transitions of different vibrational energy levels of the same PL center in the carbon core.In addition,the phenomenon of'spectral splitting'of single-particle CDs was observed at low temperature,which confirmed these oPD-based CDs were unique materials with properties of both organic molecules and quantum dots.Finally,theoretical calculations revealed their potential polymerization mode and carbon core structure.Moreover,we proposed the PL mechanism of red-emitting CDs based on oPD precursors;that is,the carbon core regulates the PL emission,and the polymer shell regulates the PL intensity.Our work resolves the controversy on the PL mechanism of oPD-based red CDs.These findings provide a general guide for the mechanism exploration and structural analysis of other types of CDs. | Boyang Wang Zhihong Wei Laizhi Sui Jingkun Yu Baowei Zhang Xiaoyong Wang Shengnan Feng Haoqiang Song Xue Yong Yuxi Tian Bai Yang Siyu Lu | 2022 | Light(Science & Applications)2022，11，7： | 2 |
| 2 | Red-emitting,self-oxidizing carbon dots for the preparation of white LEDs with super-high color rendering index显示文摘Carbon dots(CDs),as a kind of carbon nanomaterials,have attracted widespread attention due to their unique structure and excellent optical properties,and they are low-cost,environmentally friendly and biocompatible.However,the development of near-infrared(NIR)emission CDs remains a challenge.In this study,we successfully prepared CDs with a maximum emission of714 nm using citric acid as the carbon source,thiourea and ammonium fluoride as the dopant source,and N,N-dimethylformamide as the solvent.The quantum yield(QY)is as high as 22.64%.Interestingly,the prepared CDs self-oxidize in the presence of oxygen,resulting in a blue shift of their emission.Therefore,they can be used to prepare white light-emitting diodes(WLEDs)without adding other fluorescent substances.Notably,the work presented herein constitutes the first report of WLEDs preparation from single CDs. | Xin Yang Laizhi Sui Boyang Wang Yongqiang Zhang Zhiyong Tang Bai Yang Siyu Lu | 2021 | Science China Chemistry2021，64，9： | 1 |
| 3 | Regions and Their Typical Paradigms for Soil and Water Conservation in China显示文摘China is experiencing conflicts between its large population and scarce arable land,and between a demand for high productivity and the severe soil erosion of arable land.Since 1949,China has committed to soil and water conservation(SWC),for which eight regions and 41 subregions have been developed to improve the environment and increase land productivity.To obtain information from the regional planning and strategies for SWC and to explore whether SWC practices simultaneously contribute to soil conservation,ecosystem functioning,and the livelihoods of local farmers,and to summarize the successful experiences of various SWC paradigms with distinct characteristics and mechanisms of soil erosion,this paper systematically presents seven SWC regions(excluding the Tibetan Plateau region)and 14 typical SWC paradigms,focusing on erosion mechanisms and the key challenges or issues in the seven regions as well as on the core problems,main objectives,key technologies,and the performance of the 14 typical paradigms.In summary,the 14 typical SWC paradigms successfully prevent and control local soil erosion,and have largely enhanced,or at least do not harm,the livelihoods of local farmers.However,there remain many challenges and issues on SWC and socioeconomic development that need to be addressed in the seven SWC regions.China,thus,still has a long way to go in successfully gaining the win-win objective of SWC and human aspects of development. | DANG Xiaohu SUI Boyang GAO Siwen LIU Guobin WANG Tao WANG Bing NING Duihu BI Wei | 2020 | Chinese Geographical Science2020，30，4： | 1 |
| 4 | The tumor-enriched small molecule gambogic amide suppresses glioma by targeting WDR1-dependent cytoskeleton remodeling显示文摘Glioma is the most prevalent brain tumor,presenting with limited treatment options,while patients with malignant glioma and glioblastoma(GBM)have poor prognoses.The physical obstacle to drug delivery imposed by the blood‒brain barrier(BBB)and glioma stem cells(GSCs),which are widely recognized as crucial elements contributing to the unsatisfactory clinical outcomes.In this study,we found a small molecule,gambogic amide(GA-amide),exhibited the ability to effectively penetrate the blood-brain barrier(BBB)and displayed a notable enrichment within the tumor region.Moreover,GA-amide exhibited significant efficacy in inhibiting tumor growth across various in vivo glioma models,encompassing transgenic and primary patient-derived xenograft(PDX)models.We further performed a genome-wide clustered regularly interspaced short palindromic repeats(CRISPR)knockout screen to determine the druggable target of GA-amide.By the combination of the cellular thermal shift assay(CETSA),the drug affinity responsive target stability(DARTS)approach,molecular docking simulation and surface plasmon resonance(SPR)analysis,WD repeat domain 1(WDR1)was identified as the direct binding target of GA-amide.Through direct interaction with WDR1,GA-amide promoted the formation of a complex involving WDR1,MYH9 and Cofilin,which accelerate the depolymerization of F-actin to inhibit the invasion of patient-derived glioma cells(PDCs)and induce PDC apoptosis via the mitochondrial apoptotic pathway.In conclusion,our study not only identified GA-amide as an effective and safe agent for treating glioma but also shed light on the underlying mechanisms of GA-amide from the perspective of cytoskeletal homeostasis. | Jiaorong Qu Bojun Qiu Yuxin Zhang Yan Hu Zhixing Wang Zhiang Guan Yiming Qin Tongtong Sui Fan Wu Boyang Li Wei Han Xiaozhong Peng | 2023 | Signal Transduction and Targeted Therapy2023，8，12： | 0 |
| 5 | Interactions between soil conservation and dryland farming of heterogeneously eroding areas in Loess Hills,China显示文摘The unidirectional impacts of soil conservation on dryland farming and local livelihood have been well studied.However,there are gaps in literature regarding the interactions among factors,such as labor force and financial capital,in response to soil conservation,as well as the influence of such interactions on the relationships between environmental projects and agricultural development.By combining the Chinese Soil Loss Equation(CSLE)model and statistical analyses,this study investigated the spatiotemporal characteristics of soil erosion while also identifying the controlling factors that affect crop and livestock farming.The aim was to reveal how these factors interacted to influence agriculture in two case study areas between 2000 and 2017.The results showed that soil erosion substantially declined as a consequence of soil conservation,while the output from crop farming increased,indicating that there was a synergy between soil conservation and dryland farming in both the districts,over time;and factors facilitating crop farming,such as labor force,agricultural machinery,and irrigation,appeared to exert an adverse effect on livestock farming in both areas,implying a tradeoff between livestock and crop farming in the context of programs such as the Grain for Green Program(GGP)in the Loess Hills.Such a tradeoff is a result of the competition for cropland and labor that exists due to grazing prohibition and rural-urban migration.Therefore,policy-related resolutions are required to address the land use conflicts and migration-related rural labor losing due to implementation of the GGP in the Loess Hills. | Boyang Sui Xiaohu Dang Liangxin Fan Bo Guo Wei Bi Guobin Liu | 2022 | International Soil and Water Conservation Research2022，10，4： | 0 |
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