Tailoring Supramolecular Assemblies on a Metal Surface by Specifically Functionalized Porphyrins
Author | : Nikolai Wintjes |
Publisher | : Cuvillier Verlag |
Total Pages | : 99 |
Release | : 2007 |
Genre | : |
ISBN | : 3867274762 |
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Author | : Nikolai Wintjes |
Publisher | : Cuvillier Verlag |
Total Pages | : 99 |
Release | : 2007 |
Genre | : |
ISBN | : 3867274762 |
Author | : Tomáš Samuely |
Publisher | : Cuvillier Verlag |
Total Pages | : 65 |
Release | : 2008 |
Genre | : |
ISBN | : 386727830X |
Author | : Florian Buchner |
Publisher | : Springer Science & Business Media |
Total Pages | : 182 |
Release | : 2010-11-09 |
Genre | : Science |
ISBN | : 3642148409 |
The functionalization of surfaces on the nanoscale is one of the most fascinating and at the same time challenging topics in science. It is the key to tailoring catalysts, sensors, or devices for solar energy conversion, whose functional principle is based on the interaction of an active solid surface with another (liquid or gaseous) phase. As an example, planar transition metal complexes adsorbed on solid supports are promising candidates for novel heterogeneous catalysts. An important feature of these catalysts, compared to supported metal clusters, is the fact that the active sites, i. e. , the coordinated metal centers with their vacant axial coordination sites, are well de?ned and uniform. Metalloporphyrinoids are particularly suitable in this respect because they combine a structure forming element—the rigid molecular frame, which often induces long range order—with an active site, the coordinated metal ion. Its planar coordination environment leaves two axial coordination sites available for additional ligands. If adsorbed on a surface, one of these axial sites is occupied by the underlying substrate. The resulting electronic interaction with the surface can be used to tailor the electronic structure and thereby the reactivity of the metal center. The remaining site is free for the attachment of molecules (sensor functionality) and/or operates as a reaction center (single-site catalysis). Prototype examples are omnipresent in nature, where in particular metallo-tetrapyrrols play a decisive role in important biological processes, with the most prominent examples being iron porphyrins in heme, magnesium porphyrins in chlorophyll, and cobalt corrin in vitamin B12.
Author | : Peter Rodgers |
Publisher | : World Scientific |
Total Pages | : 367 |
Release | : 2009-08-21 |
Genre | : Technology & Engineering |
ISBN | : 9814466867 |
This book contains 35 review articles on nanoscience and nanotechnology that were first published in Nature Nanotechnology, Nature Materials and a number of other Nature journals. The articles are all written by leading authorities in their field and cover a wide range of areas in nanoscience and technology, from basic research (such as single-molecule devices and new materials) through to applications (in, for example, nanomedicine and data storage).
Author | : Penglei Chen |
Publisher | : Frontiers Media SA |
Total Pages | : 159 |
Release | : 2020-01-13 |
Genre | : |
ISBN | : 2889633608 |
Π-conjugated systems of delocalized aromatic electrons along their backbones, including conjugated small molecules, oligomers, polymers, and carbonaceous materials, etc., have received considerable attention from a wide variety of scientific and technical communities. Compared to inorganic materials, the advantages of those based on π-tectons lie in their broad diversity, flexibility, and tunability with regard to structure/geometry/morphology, processability, composition, functionality, electronic/band structure, etc. In terms of sophisticated molecular engineering, these features endow them not only with excellent self-assembly properties but also with unique optical, electrical, mechanical, photophysical, photochemical, and biochemical attributes. This renders them promising scaffolds for advanced functional materials (AFMs) in numerous areas of general interest such as electronics, optics, optoelectronics, photovoltaics, magnetic and piezoelectric devices, sensors, catalysts, biomedicines, and others. With regard to the design/synthesis of novel π-tectons, the launch of diverse assembly/fabrication protocols, theoretical calculations, etc., the past several decades have witnessed tremendous advancements along this direction. Thus far, a vast array of high-performance π-tectons-based AFMs have been initiated. To some extent, the cooperative principle of π-πstacking and other noncovalent interactions has been revealed, and the structure-property relationships have been disclosed. Despite the existing progress, this field still faces challenges, for example: (i) the need for scalable assembly/manufacture under ambient conditions—with low-cost, facile, environmentally-friendly protocols (ii) clearer correlations bridging the underlying intricate relationships of each successive step in assembly/manufacture (iii) corresponding theoretical calculations for guiding the rational design of π-tectons that elucidate the cooperative principle of π-π stacking and other noncovalent interactions, as well as the principle of structure-performance correlation (iv) stability and durability, among the most important concerns regarding their commercialization The advancements accumulated during the past decades have established a solid foundation for the further development of π-conjugated systems-based AFMs. We believe that with unrelenting efforts from both scientific and technical communities of various backgrounds, their practical applications will eventually be fulfilled. This Research Topic aims to address the above-mentioned challenges
Author | : Die deutsche Nationalbibliothek |
Publisher | : |
Total Pages | : 830 |
Release | : 2008 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : Elsevier |
Total Pages | : 5276 |
Release | : 2018-03-29 |
Genre | : Science |
ISBN | : 0128098945 |
Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry, Seven Volume Set summarizes current, fundamental knowledge of interfacial chemistry, bringing readers the latest developments in the field. As the chemical and physical properties and processes at solid and liquid interfaces are the scientific basis of so many technologies which enhance our lives and create new opportunities, its important to highlight how these technologies enable the design and optimization of functional materials for heterogeneous and electro-catalysts in food production, pollution control, energy conversion and storage, medical applications requiring biocompatibility, drug delivery, and more. This book provides an interdisciplinary view that lies at the intersection of these fields. Presents fundamental knowledge of interfacial chemistry, surface science and electrochemistry and provides cutting-edge research from academics and practitioners across various fields and global regions
Author | : Michael Lepper |
Publisher | : Springer |
Total Pages | : 97 |
Release | : 2015-08-11 |
Genre | : Science |
ISBN | : 3658110473 |
Michael Lepper presents a detailed room temperature scanning tunneling microscopy study of Nickel-tetraphenyltetrabenzoporphyrin on Cu(111), a prototype system for the fabrication of functional molecular architectures. The peculiar adsorption behavior, in particular the observation of three different coexisting supramolecular arrangements and the identification of two different intramolecular conformations within one arrangement, yield valuable insights into the specific molecular interactions and the self-assembly process in general.
Author | : Mercedes Crego-Calama |
Publisher | : Springer |
Total Pages | : 312 |
Release | : 2006-05-08 |
Genre | : Science |
ISBN | : 9783540321514 |
With contributions by numerous experts
Author | : Dongho Kim |
Publisher | : CRC Press |
Total Pages | : 817 |
Release | : 2012-01-12 |
Genre | : Science |
ISBN | : 9814364282 |
This book provides a comprehensive review of the fundamentals and applications of multiporphyrin arrays ranging from basic spectroscopic features to a wide range of promising applications such as molecular wires, switches, sensors, artificial photosynthetic devices, and dye-sensitized solar cells based on a variety of multiporphyrin architectures u