共查询到19条相似文献，搜索用时 31 毫秒
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本文介绍了有机颜料衍生物超分子自组装(Supramolecular self-assembly)概念及通过非共价键形成的超分子聚合物的特性.综述了吡咯并吡咯二酮(DPP)、喹吖啶酮(QA)、苝四甲酰亚胺(PBI)、金属酞菁(MePc)和苯并咪唑酮(BZI)类等有机颜料及衍生物形成有机颜料超分子自组装产物的研究进展及其应... 相似文献
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溶剂热条件下,用3,4',5-联苯三羧酸(biphenyl-3,4',5-tricarboxylic acid,H3bpt)和1,4-bis[2-(4-pyridyl) ethenyl]benzene (bpeb)合成了一种新颖的有机超分子聚合物[(H2bpt)2(H2bpeb)]n。单晶X-射线衍射研究表明,组分H2bpt与H2bpeb通过强氢键构筑了二维的超分子聚合层,进而通过层间强π-π相互作用形成三维超分子结构。结晶样品通过元素分析、热重(TG)、粉末X-ray衍射等进行了表征。370 nm紫外线激发下,化合物的最大荧光发射波长为516 nm;在365 nm紫外光照射下,晶体样品也显绿色,是潜在的绿色荧光材料。 相似文献
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超分子化学的组装与聚合是化学学科的一门新兴热点边缘学科,本文简要介绍了超分子化合物的组装、聚合及应用,详细综述了:(1)大环超分子化合物的聚集与组装;(2)大环超分子凝胶的形成;(3)磺化杯芳烃的合成及其分子组装。 相似文献
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Xuegang Chen Liang Ma Yanxiang Cheng Zhiyuan Xie Lixiang Wang 《Polymer International》2007,56(5):648-654
A family of supramolecular polymers was prepared via Cd2+‐directed self‐assembly polymerization of bis(2,2′:6′,2″‐terpyridine)‐based ligand monomers, using oligofluorenes and triphenylamine as bridges under mild conditions. The polymers were fully characterized using thermogravimetric analysis, inherent viscosity, electrochemical measurements, UV‐visible spectroscopy, photoluminescence (PL) and electroluminescence (EL). Polymers with oligofluorenes as spacers exhibited blue emission (434–442 nm) in dimethyl acetamide (DMAc) solution, while polymers with triphenylamine as spacer presented an emission peak at 494 nm in DMAc solution. Complexation polymerization of bis(2,2′:6′,2″‐terpyridine)‐based ligand monomers with cadmium(II) improved fluorescence quantum yields dramatically, and the film PL quantum yields of these polymers were about 0.38–0.54. Single‐layer light‐emitting diodes were fabricated with the configuration indium tin oxide (ITO)/polymer/Ca/Al; the EL showed green emission and the onset voltages of the devices were 8–11 V. Copyright © 2006 Society of Chemical Industry 相似文献
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Hao Liang Zhiqiang Zheng Zengchang Li Jie Xu Biao Chen Hui Zhao Qijin Zhang Hai Ming 《应用聚合物科学杂志》2004,93(2):681-685
A step‐index polymer optical fiber (SI POF) containing Rhodamine B in poly(methyl methacrylate) (PMMA) has been fabricated by a preform technique. Fluorescence of different fiber lengths were observed and discussed. A high gain (23 dB) for a SI POF with 60‐cm length, 400‐μm diameter was obtained. The Rhodamine B content of the doped SI POF is 5 ppm‐wt. The signal wavelength providing the highest gain for a 60 cm SI POF is around 630 nm, and the optimum fiber length is about 60 cm at 10 kW launched pump power. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 681–685, 2004 相似文献
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含吸电子或供电子取代基的卤代芴包括溴代芴和碘代芴 ,利用钯催化 ,可在温和的条件下与一胺、二胺及手性胺进行C Ncoupling反应 ,生成相应的芴胺衍生物。该类化合物多为具有很强荧光的荧光染料。 相似文献
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Cucurbit[n]urils (CBn) are glycoluril-based macrocyclic hosts that bind many biologically, medicinally and environmentally relevant analytes with record high affinities in aqueous media. They are therefore prime candidates for the design of chemosensors that are operational in biological fluids, waste and drinking water and have promising potential to be utilized for in vitro and in vivo sensing and imaging applications. Unlike protein-based antibodies, CBn can be prepared in multi kilogram scales, they are chemically robust and they show a desired fast analyte-binding kinetics. Unlike protein-based antibodies, CBn can be prepared in multi kilogram scales, are chemically robust and show a desired fast analyte-binding kinetics Selective analyte detection and differentiation is possible owing to the charge- and size-selective binding characteristics of the CBn members and due to the wide range of cyclic and acyclic CBn derivatives that differ in their analyte binding preference. Because CBn hosts are spectroscopically silent in the visible electromagnetic spectrum, optical signal transduction with CBn based chemosensing ensembles is typically performed by indicator displacement assays (IDA), which are easy to implement and applicable to both aliphatic and aromatic analytes. The extension to array-based sensing with CBn chemosensors is straightforward. Associative binding assays (ABA), which are uniquely available with CB8-based self-assembled receptors offer superior analyte differentiation possibility due to emerging spectral fingerprints in the absorbance, circular dichroism (CD) and emission spectra for the receptor•analyte complexes. Direct signal generation is promising for inherently spectroscopically active analytes, for instance through absorbance, CD, emission and surface enhanced Raman spectroscopy (SERS). Sensitive NMR (19F, 129Xe) techniques, electron spin resonance (ESR), redox, and mass spectrometry are also valuable signal transduction options for specific analytes. CBn based chemosensors were successfully utilized for the monitoring of biophysical processes and enzymatic reactions with label free analytes or substrates in real time. These applications capitalize on the fast equilibration kinetics of CBn-analyte complexes and the bio-compatibility of CBn hosts. The tabulated large body of data extracted from reported CBn-based binding studies is hoped to provide the reader with a valuable starting point for designing practically applicable CBn-based sensors. 相似文献