Photochromism: Molecules and Systems


Book Description

Photochromism is simply defined as the light induced reversible change of colour. The field has developed rapidly during the past decade as a result of attempts to improve the established materials and to discover new devices for applications.As photochromism bridges molecular, supramolecular and solid state chemistry, as well as organic, inorganic and physical chemistry, such a treatment requires a multidisciplinary approach and a broad presentation. The first edition (1990) provided an enormous amount of new concepts and data, such as the presentation of main families based on the pericyclic reaction mechanism, the review of new families, some bimolecular photocycloadditions and some promising systems. This new edition provides an efficient entry into this flourishing field, with the core content retained from the original work to provide a basic introduction into the different subjects.*Second edition of a work first published in 1990, now revised due to constant development of research. *Including updated lists of references (1989-2001), offering immediate access to recent developments.*Providing great basic interest and high application potential bringing scientists together from chemistry, physics and engineering.




Photochromic Materials


Book Description

Summarizing all the latest trends and recent topics in one handy volume, this book covers everything needed for a solid understanding of photochromic materials. Following a general introduction to organic photochromic materials, the authors move on to discuss not only the underlying theory but also the properties of such materials. After a selection of pplications, they look at the latest achievements in traditional solution-phase applications, including photochromic-based molecular logic operations and memory, optically modulated supramolecular system and sensors, as well as light-tunable chemical reactions. The book then describes the hotspot areas of photo-switchable surfaces and nanomaterials, photochromic-based luminescence/electronic devices and bulk materials together with light-regulated biological and bio-chemical systems. The authors conclude with a focus on current industrial applications and the future outlook for these materials. Written with both senior researchers and entrants to the field in mind.




Photomechanical Materials, Composites, and Systems


Book Description

An exhaustive review of the history, current state, and future opportunities for harnessing light to accomplish useful work in materials, this book describes the chemistry, physics, and mechanics of light-controlled systems. • Describes photomechanical materials and mechanisms, along with key applications • Exceptional collection of leading authors, internationally recognized for their work in this growing area • Covers the full scope of photomechanical materials: polymers, crystals, ceramics, and nanocomposites • Deals with an interdisciplinary coupling of mechanics, materials, chemistry, and physics • Emphasizes application opportunities in creating adaptive surface features, shape memory devices, and actuators; while assessing future prospects for utility in optics and photonics and soft robotics




Organic Photochromic and Thermochromic Compounds


Book Description

This major treatise on photochromism involving organic molecules and derived systems offers a detailed examination of the synthesis and specific photochromic properties of the best-known photochromic and thermochromic compounds. It includes practical information and commercial applications for known photochromic families.




New Frontiers in Photochromism


Book Description

Photochromism is the reversible phototransformation of a chemical species between two forms having different absorption spectra. During the phototransformation not only the absorption spectra but also various physicochemical properties change, such as the refractive index, dielectric constant, oxidation/reduction potential, and geometrical structure. The property changes can be applied to photonic equipment such as erasable memory media, photo-optical switch components, and display devices. This book compiles the accomplishments of the research project titled “New Frontiers in Photochromism” supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan. The project focused not only on the above-mentioned classical subjects in photochromism, such as color changes, optical memory, and optical switches, but also on fundamental physicochemical studies and unprecedented application fields that have not yet been explored in photochromism. The latter topics include light-driven mechanical motion, photocontrol of surface wettability, metal deposition on solid materials, photocontrol of chiral properties, ultrafast decoloration dyes, and femtosecond laser experiments, among others.




Photosynergetic Responses in Molecules and Molecular Aggregates


Book Description

This book compiles the accomplishments of the recent research project on photochemistry “Photosynergetics”, supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan, aiming to develop and elucidate new methods and molecules leading to advanced utilization of photo-energies. Topics include photochemical responses induced by multiple excitation, multiphoton absorption, strong modulation of electronic states, developments of new photofunctional molecules, mesoscopic actuations induced by photoexcitation, and novel photoresponses in molecules and molecular assemblies. The authors stress that these approaches based on the synergetic interaction among many photons and many molecules enable the expansion of the accessibility to specific electronic states. As well, they explain how the development of reaction sequences and molecules/molecular assemblies ensure “additivity” and “integration” without loss of the photon energy, leading to new photoresponsive assemblies in meso- and macroscopic scales.




Photochemistry


Book Description

Photochemistry: An Introduction covers topics such as industrial photochemistry, solid state photochemistry, spectroscopy and photochemistry of the solid state, industrial applications of photochemistry, and photochromism. The book discusses the application of bonding, structure, energetics, and reactivity of the ground states of molecules to describe the same properties for molecules in their electronically excited states; the electronic spectra of excited states; and how the excited states react to form chemical transients. The text also describes light sources, techniques for measuring light intensities and quantum yields, methods used to detect transient photochemical products, and some ancilliary techniques. A review of some features of typical photochemical processes conducted in the vapor state and a survey of the reactions of the urban atmosphere, are also considered. The book further tackles the mechanisms of organic photochemical reactions; the synthetic applications of organic photochemistry; and the photochemistry of the solid state. The text also looks into photochromism and the industrial applications of photochemistry. People involved in the field of photochemistry will find the book useful.




Functionality of Molecular Systems


Book Description

Molecular systems are assemblies of molecules designed to possess special qualities and desired functionality. Such systems are important because they provide materials with novel properties, and they will be particularly useful for minimizing electronic devices. In this two volume work, the first volume, subtitled 'From Molecules to Molecular Systems', covered the fundamentals of molecular design, while volume 2 deals with the potential applications of molecular systems. Information transduction and energy conversion are the basis of any practical device, and these considerations, along with the required interconnections and interfaces, are analyzed to produce the architectural design for a molecular system. The preparation of molecular systems is also considered, including that of self-organizing molecular assemblies, ultrathin films, and ultrafine particles.




Molecular Devices and Machines


Book Description

The miniaturization of bulky devices and machines is a process that confronts us on a daily basis. However, nanoscale machines with varied and novel characteristics may also result from the enlargement of extremely small building blocks, namely individual molecules. This bottom-up approach to nanotechnology is already being pursued in information technology, with many other branches about to follow. - Written by a team of experienced authors headed by Vincenzo Balzani, one of the pioneers in the development of molecular machines - Covers such diverse aspects as sensors, memory components, solar energy conversion, biomolecules as molecular machines, and much more - Presented in a lucid style and didactically structured, with both the expert and the newcomer in mind - Includes a glossary of terms and numerous references to the recent literature Be among the first to explore the fascinating possibilities of this future-oriented technology! A must-have for every chemist and materials scientist with an interest in nanotechnology.




Photochemical Processes in Organized Molecular Systems


Book Description

Photochemical processes form the basis of life. Energy transfer through photons also underlies a wide range of phenomena ranging from the motion of atoms and molecules to the assembly of systems of molecules, such as polymers, Langmuir-Blodgett films and even liquid crystals.Photochemical Processes in Organized Molecular Systems provides an overview of recent photochemical investigations of systems of molecules. The book is divided into four parts: the first two deal with current progress on the understanding of photoinduced chemical processes, the third and fourth chapter deal with the photochemistry of organized molecular systems including polymers, micelles and liquid crystals.This book should be studied by all who want to know more about this promising field of photochemical research, and about the fascinating processes that light can bring about.