共查询到20条相似文献,搜索用时 390 毫秒
1.
2.
3.
4.
化学领域的前沿──超分子化学 总被引:10,自引:0,他引:10
超分子化学是一个蓬勃发展的化学新领域,本文综述了超分子化学发展概况,重点介绍了分子识别、分子自组装、超分子材料、超分子器件及超分子催化方面的新成果,简明阐述了超分子体系形成的理论基础,同时引入了分子光子学、分子电子学、分子离子学、超分子科学等前沿学科。 相似文献
5.
含三苯胺的二苯乙烯化合物的合成及其电致发光性能 总被引:2,自引:2,他引:0
电致发光器件在光通讯、光信息处理、视频器件、测控仪器等光电子领域有着广泛而重要的应用价值.无机半导体二极管、半导体粉末、半导体薄膜等电致发光器件尽管已取得了令人注目的成就,但由于其复杂的器件制备工艺,高驱动电压、低发光效率,不能大面积平板显示,能耗较高以及难以解决短波长(如蓝光)等问题,使得无机电致发光材料的进一步发展受到一定的影响.相比之下,有机化合物可通过分子设计的方法合成数量巨大、种类繁多的有机化合物发光材料,使得有机材料构成的电致发光器件有着众多的优势,并成为目前电致发光领域的前沿研究课题之一.有关… 相似文献
6.
7.
将一些发色团分子组装成具有特定功能的分子器件,是近年来随超分子化学和分子信息科学兴起而十分活跃的领域[1],其中具有逻辑功能的光控开关器件是下一代分子计算机的核心,它们可在分子水平实现信息的存储和数据的处理、传输[2].国内外这方面的研究主要有顺反异... 相似文献
8.
利用超分子组装体系模拟植物光合作用实现光催化氧化水制氢是解决能源危机和环境问题的一大构想。介绍了超分子体系利用光能催化水氧化分解的基本原理,总结阐述了光催化剂的催化过程及应用,对光催化水氧化分子器件的发展现状进行了介绍,分析了其中的缺陷,就其发展方向提出了展望。 相似文献
9.
分子钳化学是当今化学学科研究的热点之一.介绍了分子钳化合物的结构、应用及新进展,重点综述了分子钳化合物的合成、分子钳对手性分子及阴离子的识别作用、分子钳对中性分子的识别作用,并对其应用前景进行了展望,期望能在医药学、生命科学、材料科学、环境科学、分子器件、生物传感器、仿生催化及分析分离科学中得到更广泛的应用. 相似文献
10.
11.
Thanks to the development of appropriate experimental techniques, molecular devices and their electrical transport properties have recently been the focus of a major research effort. This brief review describes how individual molecules can be contacted with metallic electrodes to form molecular junctions and addresses their basic formation mechanisms. An extension to molecular junctions networks is also discussed. Functionality could be demonstrated in such systems, and examples where conductance modulation using light or chemical stimuli was achieved will be presented. 相似文献
12.
13.
14.
Michael Schmittel 《Israel journal of chemistry》2019,59(3-4):197-208
This essay highlights the role of single and multiple reversible self‐sorting events for the development of responsive multi‐component structures as well as multi‐state transformations, devices and machinery. Recent examples illustrate how distinct molecular devices are spatiotemporarily interconnected by chemical signaling to act as integrated machinery and highlight the enormous potential of molecular cybernetics. 相似文献
15.
Looking at exhaust‐gas after‐treatment systems in its entirety leads to further improvement of emission control devices and to the accomplishment of future challenges such as lower legislative emission limits, new fuels, and more efficient engine concepts. This article provides an overview on the state‐of‐the art mobile exhaust‐gas after‐treatment devices. Current and future challenges are discussed in the light of present approaches such as hierarchical modeling reaching from DFT computations of molecular processes to CFD simulation of entire lines of exhaust‐gas cleaning devices, close‐to‐reality emission control test benches and aging procedures, on‐board diagnostics, and catalyst characterization at operating conditions and preferentially all length scales. In future, knowledge‐based robot‐controlled preparation and dynamic models coupled with information from real operation will significantly support research and development. 相似文献
16.
Tour JM 《Accounts of chemical research》2000,33(11):791-804
Molecular electronics involves the use of single or small packets of molecules as the fundamental units for computing. While initial targets are the substitution of solid-state wires and devices with molecules, long-range goals involve the development of novel addressable electronic properties from molecules. A comparison of traditional solid-state devices to molecular systems is described. Issues of cost and ease of manufacture are outlined, along with the syntheses and testing of molecular wires and devices. 相似文献
17.
This feature article presents a short review of the recent developments in the synthesis of conjugated polyelectrolytes (CPEs) along with their applications in organic optoelectronic devices with particular focus on the molecular structures of CPEs with ionic functionality, synthetic approaches, and their utilization as an interfacial layer. The orthogonal solubility of the CPEs allows the simple preparation of multilayer organic devices by solution casting on top of a nonpolar organic photoactive layer without disturbing the interfaces, showing their effectiveness in tuning the electronic structures at the interfaces for improving the charge carrier transport and resulting device properties. These achievements highlight the dynamic nature of CPEs and their applicability to a wide range of optoelectronic devices. 相似文献
18.
Toward the development of drug carriers that are capable of crossing biological membranes, controlled emulsion polymerization has been utilized to produce nanoparticulate carriers from the combination of poly(alkyl cyanoacrylate) and alkylglyceryl dextran to a molecular structure designed to combine the nonimmunogenic and stabilizing properties of dextran with the demonstrated permeation enhancing ability of alkylglycerols. To this aim, a systematic series of alkylglyceryl dextrans have been synthesized and functionalized with ethyl or butyl cyanoacrylates to form stable polymeric nanocarriers (100–500?nm). Results of investigations into their capability to act as controlled-release devices and their cytotoxicity against bEnd3 cells are reported. 相似文献
19.
This review focuses on the intrinsic charge transport in organic photovoltaic (PVC) devices and field-effect transistors (SAM-OFETs) fabricated by vapor phase molecular self-assembly (VP-SAM) method. The dynamics of charge transport are determined and used to clarify a transport mechanism. The 1,4,5,8-naphthalene-tetracarboxylic diphenylimide (NTCDI) SAM devices provide a useful tool to study the fundamentals of polaronic transport at organic surfaces and to discuss the performance of organic photovoltaic devices in nanoscale. Time-resolved photovoltaic studies allow us to separate the charge annihilation kinetics in the conductive NTCDI channel from the overall charge kinetic in a SAM-OFET device. It has been demonstrated that tuning of the type of conductivity in NTCDI SAM-OFET devices is possible by changing Si substrate doping. Our study of the polaron charge transfer in organic materials proposes that a cation-radical exchange (redox) mechanism is the major transport mechanism in the studied SAM-PVC devices. The role and contribution of the transport through delocalized states of redox active surface molecular aggregates of NTCDI are exposed and investigated. This example of technological development is used to highlight the significance of future technological development of nanotechnologies and to appreciate a structure-property paradigm in organic nanostructures. 相似文献
20.
Natalie Stingelin 《Polymer International》2012,61(6):866-873
The physical organisation, from the molecular to the macroscale, of functional organic matter such as polymer semiconductors can profoundly affect the properties and features of the resulting architectures and their consequent performance when used as active layers in organic optoelectronic devices, including organic thin‐film field‐effect transistors, organic light‐emitting diodes or organic photovoltaic cells. Here, we present a survey on the principles of structure development from the liquid phase of this interesting and broad class of materials with focus on how to manipulate their phase transformations and solid‐state order to tailor and manipulate the final ‘morphology’ towards technological and practical applications. Copyright © 2012 Society of Chemical Industry 相似文献