Application of the Ring-current Effect in Phthalocyanines
Author | : Clement Kin-man Choy |
Publisher | : |
Total Pages | : |
Release | : |
Genre | : |
ISBN | : |
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Author | : Clement Kin-man Choy |
Publisher | : |
Total Pages | : |
Release | : |
Genre | : |
ISBN | : |
Author | : Thomas Ralph Janson |
Publisher | : |
Total Pages | : 208 |
Release | : 1971 |
Genre | : |
ISBN | : |
Author | : Yusuf Yilmaz |
Publisher | : BoD – Books on Demand |
Total Pages | : 255 |
Release | : 2017-06-21 |
Genre | : Science |
ISBN | : 9535132555 |
Since their initial accidental synthesis and characterization in Scotland in the late 1920s, there has been a strong research focus on the use of phthalocyanines (Pcs) as dyes and pigments. In recent years, active research fields have included their use in electrophotography, photovoltaic and solar cells, molecular electronics, Langmuir-Blodgett films, photosensitizers, electrochromic display devices, gas sensors, liquid crystals, low-dimensional conductors, and optical disks. Phthalocyanines possess interesting biological, electronic, optical, catalytic, and structural properties. The main disadvantage is their insolubility in common solvents due to strong intermolecular - interactions. The solubility of phthalocyanines can be increased by various methods such as the formation of anionic and cationic species and both axial and peripheral substitution. Substitution at the nonperipheral and peripheral positions of the benzo moieties usually enhances their solubility in organic solvents. The most important advantage of phthalocyanines compared to porphyrins is that their Q bands lie at longer wavelengths and are considerably more intense. In this book, you will find synthesis and some applications of various phthalocyanine derivatives.
Author | : Frank Hans Moser |
Publisher | : |
Total Pages | : 194 |
Release | : 1983 |
Genre | : Phthalocyanines |
ISBN | : |
Author | : J.F. Harrod |
Publisher | : Springer Science & Business Media |
Total Pages | : 352 |
Release | : 2012-12-06 |
Genre | : Technology & Engineering |
ISBN | : 9401103372 |
In the ten years since the scientific rationale for the design, synthesis and application of inorganic and organometallic polymers (IOPs) was first conceptualised, we have witnessed the first tentative exploration of IOPs as precursors to new materials, with efforts focusing on the design and synthesis of novel ceramic precursors. Developing expertise led to precursor studies combined with the characterisation of the transformation processes that occur when IOPs are converted to ceramic materials. Now at maturity, the science presented in this volume reveals the polymer precursor approach to materials synthesis together with examples of processing ceramic shapes for a range of mechanical properties, the development of sophisticated, noninvasive analytical techniques, and IOP design rationales relying on well-defined processing-property relationships. The production of multifunctional IOPs is described, providing ion conductivity, gas sensing, bioactivity, magnetic properties, etc., combined with processability. The existence of well-defined IOPs and the exquisite control that can be exerted on sol-gel systems now provide access to such a variety of mixed organic-organometallic and/or inorganic hybrid systems that their exploitation is likely to develop into an entirely new field of materials chemistry. Future exciting avenues of research are also being opened up with the advent of buckyballs, Met-Cars, dopable preceramics, rigid-rod organometallics, and molecular tinkertoys.
Author | : |
Publisher | : |
Total Pages | : 840 |
Release | : 2009 |
Genre | : Dissertations, Academic |
ISBN | : |
Author | : Leznoff, C. C. (Clifford C.) |
Publisher | : New York : VCH, 1989-c1996. |
Total Pages | : 328 |
Release | : 1989 |
Genre | : Science |
ISBN | : |
Up-to-date and written by leading experts, this book is unique in a rapidly expanding field. It provides in-depth discussions and descriptions of the materials, electronic properties and applications of phthalocyanines. Aspects of phthalocyanines covered include * synthesis * polymer aspects * electronic spectroscopy * excited state chemistry and physics * chemical sensors * biological aspects (e.g. photodynamic therapy of cancer) The numerous tables, chemical structures, and references are particularly handy source materials for both the novice and experienced researcher and industrial practitioner interested in phthalocyanines.
Author | : Leznoff, C. C. (Clifford C.) |
Publisher | : New York : VCH, 1989-c1996. |
Total Pages | : 328 |
Release | : 1989 |
Genre | : Phthalocyanines |
ISBN | : 9781560815440 |
Author | : Thomas R. Janson |
Publisher | : |
Total Pages | : 26 |
Release | : 1969 |
Genre | : |
ISBN | : |
Some simple classical current-loop calculations have been carried out on the phthalocyanine ring. Data for the calculations have been supplied by some single-ring and multi-ring silicon and germanium phthalocyanines. Possible structural uses are foreseen for the results. (Author).
Author | : Cornelius Krull |
Publisher | : Springer Science & Business Media |
Total Pages | : 158 |
Release | : 2013-11-19 |
Genre | : Science |
ISBN | : 3319026607 |
The application of molecules in technological devices hinges on the proper understanding of their behavior on metallic electrodes or substrates. The intrinsic molecular electronic and magnetic properties are modified at a metallic interface, and greatly depend on the atomic configuration of the molecule-metal bond. This poses certain problems, such as the lack of reproducibility in the transport properties of molecular junctions, but also offers the possibility to induce new charge and spin configurations that are only present at the interface. The results presented in this thesis address this issue, providing a comprehensive overview of the influence of molecule-metal and molecule-molecule interactions on the electronic and magnetic properties of molecules adsorbed on metallic substrates. Using metal-phthalocyanines (MePc), a commonly used metal-organic complex as a model system, each chapter explores different aspects of the interaction with silver surfaces: the local adsorption geometry, self-assembly, the modifications of the electronic and magnetic characteristics due to hybridization and charge transfer, and finally the manipulation of molecular charge and spin states by electron doping using alkali atoms moved with the STM tip.