共查询到20条相似文献,搜索用时 74 毫秒
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双杯芳烃是杯芳烃家族中的重要一员。它由两个杯芳烃单元通过化学键联结而形成,一般常有上缘-下缘、下缘-下缘、下缘-上缘3种桥联方式,其结构更复杂,性质也更为丰富多彩。双杯芳烃具有两个相同或不相同的结合部位,可同时络合两个相同或不相同的底物,还可表现出特殊的协同作用、更强的络合能力、变构象以及粒子雾荡等新的性质。本文根据杯芳烃亚单元的种类,综述了双杯芳烃的研究进展,重点描述了不同桥联方式的双杯[4]芳烃的合成方法,而且对一些具有特殊性能的双杯芳烃进行了较为详细的介绍。最后对双杯芳烃的发展前景作了展望。 相似文献
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Optical Chemical Sensors Based on Sol-Gel Materials: Recent Advances and Critical Issues 总被引:1,自引:0,他引:1
B.D. Mac Craith C. Mc Donagh A.K. McEvoy T. Butler G. O'Keeffe V. Murphy 《Journal of Sol-Gel Science and Technology》1997,8(1-3):1053-1061
The use of the sol-gel process to produce materials for optical chemical sensors and biosensors is attracting considerable
interest. This interest derives mainly from the design flexibility of the sol-gel process and the ease of fabrication. In
most applications the sol-gel material is used to provide a microporous support matrix in which analyte-sensitive species
are entrapped and into which smaller analyte molecules may diffuse. Sensors based on entrapped organic and inorganic dyes,
enzymes and other biomolecules have been reported. A range of sensor configurations has been employed, including monoliths,
thin films, as well as more elaborate structures. In this paper a selection is presented of recent significant developments
in optical chemical sensors which employ solgel-derived materials. These developments include the tailoring of sol-gel materials
to optimise sensor response, advanced waveguide structures and novel probe-tip sensors. Those issues which remain critical
to the eventual deployment of sol-gel sensors are examined. In particular, the problems of leaching, microstructural stability,
diffusion-limited response time, and susceptibility to interferents are discussed and some solutions proposed. 相似文献
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作为传感器中最重要的研究方向之一,分子印迹传感器在近十年的发展中取得了巨大进展。分子印迹聚合物膜在转换器表面的固定化方法有涂膜法、原位引发聚合法和电化学聚合法等,其中电聚合法因具有制备简单快速、膜厚可控、膜与电极附着紧密、重现性好等优点而成为极具潜力的制备方法。该文评述了基于电化学聚合技术的分子印迹传感器的主要研究进展,对聚合膜制备过程中单体的选择和模板的去除进行了讨论,对电聚合制备的印迹传感器在传感领域的分析应用进行了总结,并在此基础上对其未来发展进行了展望。 相似文献
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Michaele J. Hardie 《Supramolecular chemistry》2013,25(1):7-10
Combinations of ferrocene with unsubstituted calix [n]arenes, n =4 and 5, in toluene afford crystalline inclusion complexes (calix[4]arene) 3 (ferrocene) [hexagonal, a =14.7797(4), c =18.4400(4) Å, P6M3/m , ρ = 1.389 g.cm ?1 , Z =2, R 1 =0.0963 (on 1401 observed data [ I >2 σ ( I )])] as a lattice-type inclusion complex, and (calix[5]arene)(toluene) 0.55 (ferrocene) 0.45 [monoclinic, a =9.6908(8), b =15.069(1), c =22.957(1) Å, β = 90.155(5)°, P21/m , ρ =1.318 g.cm ?1 , Z =4, R 1 =0.1005 (on 3130 observed data [ I >2 σ ( I )])], that shows endo -cavity complexation of ferrocene by the calixarene. 相似文献
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Margarita Guenther Gerald Gerlach Cathrin Corten Dirk Kuckling Martin Muller Zhangman Shi Joerg Sorber Karl-Friedrich Arndt 《Macromolecular Symposia》2007,254(1):314-321
Summary: A rapidly expanding field of on-line process monitoring and on-line control in biotechnology, food industry, pharmaceutical industry, process chemistry, environmental measuring technology, water treatment and sewage processing requires the development of new micro fabricated reliable chemical and biosensors that are specific for particular species and can attain the analytic information in a faster, simpler and cheaper manner. Using a functionalised polymer coating in sensors provides the possibility to detect, transmit and record the information regarding the concentration change or the presence of a specific analyte (a chemical or biological substance that needs to be measured) by producing a signal proportional to the concentration of the target analyte. However, the sensor response time and signal reproducibility are limited by the visco-elastical and hysteresis behaviour of the polymer material. We propose some methods improving the properties of the chemical sensors on the basis of thermo-shrinking N-isopropylacrylamide (NIPAAm) copolymer gels. 相似文献
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超分子在质量敏感压电化学传感器中的应用 总被引:8,自引:0,他引:8
以质量敏感为分析基础的压电化学传感器,其表面涂层往往决定其对分析物的选择性。超分子作为压电石英晶体涂层,应用主-客体分子识别的原理,显著提高压电化学传感器的选择性。该文详细论述了近十年有关超分子主体化合物在体波和表面波化学传感器的应用,并了涂膜技术及主-客体识别机理。 相似文献
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V. Kalchenko L. Atamas O. Klimchuk V. Rudzevich Yu. Rudzevich V. Boyko 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6-7):1537-1540
A series of calix[4,6]arenes functionalized with phosphinoxyde, diphosphindioxyde, and carbamoylphosphinoxide groups, which possess high binding ability to metal cations or protodonative organic molecules and are linked to the wide rim of macrocyclic skeleton by different spacers, has been synthesized. 相似文献
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In this review, we detail the evolution and recent progress of glove‐based wearable electrochemical sensors with focus on forensic, security, and defense applications. Glove‐based wearable sensors offer the ability to have rapid, on‐site chemical and biological threat assessment, ranging from explosive and gunshot residues to drugs of abuse and pesticides, critical for timely and informed incident management and investigation. Additionally, these field deployable systems offer the ability for law enforcement to complete on‐the‐spot qualitative chemical testing for immediate forensic evidence collection in connection to mechanical ‘swipe’ sampling. Recent advances have been made for translation of this class of wearable electrochemical sensors to increase the sensory perspective of robotics, demonstrating the progression to robotic skin with chemical analysis capability suitable for translation to remote chemical analysis in hazardous scenarios. Critical to such progress have been advances in flexible electrochemically‐compatible materials and design, with increasing functionality, leveraging from advances in wearable biosensors and electronic miniaturization. Indeed, the customization potential of these wearable systems is great, yet challenges remain for advancing these systems from prototypes to more ubiquitous devices readily deployed in the field. With significant attention these challenges can be overcome, creating new opportunities for further decentralization of electrochemical analyses using these flexible and intuitive glove‐based wearable sensing systems for significant impact on fields such as forensics, defense, biomedical, robotics and beyond. 相似文献