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检测谷胱甘肽的荧光探针
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作者 颜范勇 臧悦言 +3 位作者 章宇扬 李想 王瑞杰 卢贞彤 《化学进展》 SCIE CAS CSCD 北大核心 2022年第5期1136-1152,共17页
谷胱甘肽作为细胞中最丰富的非蛋白巯基化合物,对维持人体正常生理活动有着重要作用。因此,能够高效灵敏检测谷胱甘肽意义重大。荧光探针法具有操作方便、特异性优良和灵敏度高等优点,成为目前检测生物样品中谷胱甘肽的主要手段。荧光... 谷胱甘肽作为细胞中最丰富的非蛋白巯基化合物,对维持人体正常生理活动有着重要作用。因此,能够高效灵敏检测谷胱甘肽意义重大。荧光探针法具有操作方便、特异性优良和灵敏度高等优点,成为目前检测生物样品中谷胱甘肽的主要手段。荧光探针法的成功应用还得益于谷胱甘肽的特殊结构特征,如巯基的亲核性、还原性、对金属离子高亲合力以及氨基的协同反应能力。本文针对近五年来特异性检测谷胱甘肽的荧光探针进行总结,将其分为有机荧光探针和无机荧光探针两大类,并结合香豆素、BODIPY、罗丹明、花菁、苯并噻唑、萘酰亚胺、金属有机骨架、半导体量子点、碳点、金属纳米颗粒、二氧化锰纳米片、石墨烯量子点等有机/无机荧光探针的结构特征,综述了迈克尔加成反应、亲核取代、还原反应以及硫醇诱导的2,4-二硝基苯磺酰基的断裂反应与络合反应等传感机理。同时,对探针的设计策略、谷胱甘肽的响应模式及其在实际中的应用进行了阐述和分析,以期为新型谷胱甘肽荧光探针的构建提供新的思路。 展开更多
关键词 谷胱甘肽 荧光探针 检测 有机 无机
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Multicolor carbon dots with concentration-tunable fluorescence and solvent-affected aggregation states for white light-emitting diodes 被引量:8
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作者 fanyong yan Yingxia Jiang +3 位作者 Xiaodong Sun Junfu Wei Liang Chen Yuyang Zhang 《Nano Research》 SCIE EI CAS CSCD 2020年第1期52-60,共9页
Multicolor emissive carbon dots(M-CDs)have tremendous potential applications in manifold fields of bioimaging,biomedicine and light-emitting devices.Until now,it is still difficult to produce fluorescence tunable CDs ... Multicolor emissive carbon dots(M-CDs)have tremendous potential applications in manifold fields of bioimaging,biomedicine and light-emitting devices.Until now,it is still difficult to produce fluorescence tunable CDs with high quantum yield across the entire visible spectra.In this work,a type of M-CDs with concentration-tunable fluorescence and solvent-affected aggregation states was synthesized by solvothermal treatment of citric acid(CA)and 1-(2-pyridylazo)-2-naphthol(PAN)and the formation mechanism was monitored by different reaction time and raw material ratio.The fluorescence spectra of M-CDs in organic solvents can range from 350 to 750 nm by adjusting the concentration.M-CDs possess different aggregation states in water and organic solvents,accompanied by different fluorescence emission,which is attributed to the different surface states of various component CDs in M-CDs.Moreover,the obtained products can be uniformly dispersed into polymethylmethacrylate(PMMA)solutions as well as epoxy resins to fabricate transparent CDs/PMMA films and CDs/epoxy composites,which can effectively prevent the aggregation and produce multicolor and white light-emitting diodes(WLED).In addition,the prepared WLED with Commission Internationale de L’Eclairage(CIE)of(0.29,0.31)by using M-CDs/epoxy resin as packages,demonstrating the M-CDs exhibit potential applications for light-emitting devices. 展开更多
关键词 carbon dots formation mechanism concentration-tunable fluorescence solvent-affected aggregation states light-emitting devices
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Solvent-controlled synthesis strategy of multicolor emission carbon dots and its applications in sensing and light-emitting devices 被引量:3
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作者 Zhonghui Sun fanyong yan +2 位作者 Jing Xu Hao Zhang Li Chen 《Nano Research》 SCIE EI CSCD 2022年第1期414-422,共9页
Carbon dots(CDs),as a new kind of carbon-based luminescent nanomaterials,have drawn widespread attention in the fields of fluorescence sensing,optoelectronic devices,and biological imaging.This work uses citric acid(C... Carbon dots(CDs),as a new kind of carbon-based luminescent nanomaterials,have drawn widespread attention in the fields of fluorescence sensing,optoelectronic devices,and biological imaging.This work uses citric acid(CA)and Nile Blue A(NBA)as precursors.By simply changing the solvent in the reaction,their bandgaps were systematically controlled,thereby successfully obtaining bright blue,yellow and red fluorescence emission CDs(B-,Y-and RCDs).The higher quantum yield(QY)of B-,Y-and RCDs are 64%,57%and 51%,respectively.The selected precursors and different solvents are the key to the formation of three emission CDs.Detailed characterization and density functional theory(DFT)calculations further indicate that the difference in emission color of CDs is due to the size of the sp^(2) conjugate domain.In addition,we used multicolor CDs as fluorescent probes to investigate their performance in detection.Among them,BCDs and YCDs can detect Sudan Red I with high selectivity and sensitivity.In the concentration range of 0 to 80 pM,the detection limits are 56 and 41 nM,respectively.Multicolor emitting phosphors and fluorescent films are also obtained by mixing CDs with other matrices.Using Ultraviolet(UV)chip as the excitation source and combining with multicolor fluorescent film and a certain proportion of B-,Y-,and RCDs/epoxy resin composites,bright monochromatic light-emitting diodes(LEDs)and white LED(WLED)with high color rendering index(CRI)were prepared.The above results indicate that the multicolor CDs prepared by us have great application potential in the fields of food safety control and optical devices. 展开更多
关键词 carbon dots solvents tunable emission Sudan Red I PHOSPHOR light-emitting diodes
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