共查询到16条相似文献,搜索用时 62 毫秒
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综述了共轭聚合物作为传感材料在荧光化学传感器中的应用特征,着重就其良好的半导体性及灵敏性、高的摩尔吸光系数与荧光量子效率、传感信号放大功能以及良好的加工性能进行了介绍。此外,还对其发展方向和应用前景进行了展望。 相似文献
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荧光共轭聚合物传感器的应用 总被引:1,自引:1,他引:0
介绍了共轭聚合物的荧光信号放大机理,综述了近年来作为传感器的荧光共轭聚合物的应用研究进展,以及共轭聚合物作为基材的传感器的种类、共轭聚合物在传感器方面面临的问题及研究方向。 相似文献
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由于其特殊的光学和电子性质,共轭聚合物受到人们的广泛关注.共轭聚合物可以在各种传感器件中用作活性材料,例如:生物传感器;气体、湿度传感器;离子传感器;压力、温度传感器等.本文综述了共轭聚合物在传感器应用方面的一些新的进展. 相似文献
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水溶性荧光聚合物的合成和应用 总被引:1,自引:0,他引:1
综述了丙烯酰胺类水溶性荧光聚合物的合成方法,应用,理论研究及最新进展。这类聚合物可通过可参与聚合的荧光染料及其标记的单体与丙烯酰胺类水溶性单体共聚,或荧光染料与丙烯酰胺类水溶性聚合物及其衍生物反应制得。这类聚合物的荧光检测下限已达到0.1×10^_6-0.01×10^-6g/g。 相似文献
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开发了一种新型、快速的荧光传感器用于水样品中Hg~(2+)的检测。合成了一种戊二醛-壳聚糖非共轭荧光聚合物(GCPF),在370 nm波长激发下,于455 nm波长处产生荧光。研究发现,汞离子(Hg~(2+))的存在能使GCPF荧光被猝灭。传感器对Hg~(2+)的检测线性范围是0. 8~30μmol/L,检测限为85 nmol/L。该方法灵敏度高、线性范围宽、成本较低、操作方便、响应迅速(约1 min),对其他金属离子具有很好的选择性。将其应用于实际水样中Hg~(2+)检测时也得到了令人满意的结果。 相似文献
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设计合成含2-硫代海因的小分子对照物1和聚苯撑乙炔poly(1)。通过一系列阴离子的正四丁基铵盐的DMSO溶液来评价聚合物的阴离子识别性能。加入F-后,poly(1)的DMSO溶液荧光淬灭;然而,加入Cl-,Br-,HSO-4,NO-3和CH3CO-2后,poly(1)溶液荧光不变,说明poly(1)对氟离子有荧光识别能力。Poly(1)对F-的Stern-Volmer淬灭常数为7.09×104M-1,相应地,对照物1对F-的Stern-Volmer淬灭常数为5.10×102M-1,说明了poly(1)具有增强淬灭效应。 相似文献
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设计合成了一个氨基葡萄糖修饰的水溶性锌离子荧光增强型化学传感器,并借助核磁共振谱和质谱对其结构进行了表征,利用荧光光谱法研究了该传感器对不同金属离子的荧光响应。结果显示,在4-羟乙基哌嗪乙磺酸(HEPES)缓冲溶液中,该传感器能与Zn2+配位且在发射波长490 nm处荧光显著增强,除Cu2+、Ni2+、Co2+和Cr3+对此配合物荧光强度有不同程度猝灭外,其他金属离子的加入均没有引起其明显变化,说明传感器对Zn2+有较好的选择性;同时,Job曲线表明二者形成了结合比为2∶1的稳定配合物。 相似文献
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Conjugated fluorescent polymer sensor for proteolytic activity detection with designed specificity 下载免费PDF全文
A portable fluorescence assay for direct endopeptidase activity detection has been developed with the use of a cyclophane‐based conductive conjugated fluorescent polymer and peptide substrates. The substrates, carrying internal quenching amino acid, were designed to be cleaved in a sequence‐specific manner by a protease of interest. Intact substrates were incapable of quenching the fluorescence of the polymer due to steric constraints. Upon specific cleavage, the quencher became exposed and could interact with the ring structure of the fluorescent polymer, disrupting the conjugation and quenching the fluorescence along the polymer chain. The approach was developed using a model Glu‐C endopeptidase from Staphylococcus aureus strain V8, detected in the picomolar to micromolar concentration range. The developed assay was tested for the detection of endopeptidase activity of botulinum toxin. The feasibility study showed that botulinum neurotoxin (BoNT)‐A could be detected down to picomolar concentration, with limit of detection of 5 pg, or 33 amol in 5 µL of sample, and a total assay time under 2 h. The assay exhibited high specificity and no cross‐reactivity with BoNT‐B was detected. Following this proof‐of‐concept work, the assay can be further optimized and expanded to differentiate between various botulinum toxin serotypes in their active proteolytic form, or modified for detection of proteases with other specificities. © 2015 Society of Chemical Industry 相似文献
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综述了水性高分子材料在混凝土外加剂中的研究及应用情况,其中包括减水剂、引气剂、减缩剂、水下不分散剂及阻锈剂等。并着重介绍三聚氰胺系、脂肪族、氨基磺酸系和聚羧酸系等几类高效减水剂的合成及应用现状。 相似文献
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Gabriela Grze Karol Wolski Tomasz Uchacz Justyna Baa Boris Louis Ivan G. Scheblykin Szczepan Zapotoczny 《International journal of molecular sciences》2022,23(11)
The high stability and conductivity of 3,4-disubstituted polythiophenes such as poly(3,4-ethylenedioxythiophene) (PEDOT) make them attractive candidates for commercial applications. However, next-generation nanoelectronic devices require novel macromolecular strategies for the precise synthesis of advanced polymer structures as well as their arrangement. In this report, we present a synthetic route to make ladder-like polymer brushes with poly(3,4-propylenedioxythiophene) (PProDOT)-conjugated chains. The brushes were prepared via a self-templating surface-initiated technique (ST-SIP) that combines the surface-initiated atom transfer radical polymerization (SI-ATRP) of bifunctional ProDOT-based monomers and subsequent oxidative polymerization of the pendant ProDOT groups in the parent brushes. The brushes prepared in this way were characterized by grazing-angle FTIR, XPS spectroscopy, and AFM. Steady-state and time-resolved photoluminescence measurements were used to extract the information about the structure and effective conjugation length of PProDOT-based chains. Stability tests performed in ambient conditions and under exposure to standardized solar light revealed the remarkable stability of the obtained materials. 相似文献
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新型水溶性萘啶基荧光材料的制备及性能研究 总被引:1,自引:0,他引:1
本文制备得到一种新型萘啶基的水溶性光致发光聚合物:聚丙烯酸(PAA)-2-苄氨基-7-甲基-1,8-蔡啶,PAA5-PAMN2(PAMN是2-phenmethy-lamino-7-methyl-1,8-naphthyridine的缩写),经光谱分析和密度泛函理论计算,研究了化合物的结构和组成,这种聚合物在酸性和碱性条件下呈现最大的吸收波长分别为364和342nm.Zn(OAc)2,的加入致使PAA5-PAMN,水溶液的荧光猝灭,而当OAcˉ改变为NO3ˉ时,在荧光强度不断降低的同时,由于NO3ˉ离子的配位使最大发射波长从410nm蓝移到400nm.Na^+离子对其没有明显的荧光猝灭效应, 相似文献