Esipt Photochromism

Esipt Photochromism PDF Author: Mikhail Knyazhanskiy
Publisher: Xlibris Corporation
ISBN: 1543477496
Category : Science
Languages : en
Pages : 636

Get Book Here

Book Description
The photochromic anils (Imines of o-hydroxy aldehydes) have been found in the beginning of the last century, and therefore the views of this phenomenon were developing, along with theory of the structure and reaction mechanism and the methods of their investigations. The description of this development has been given shortly in the chapter one. The structure of anils, their properties, and their modifications in dependence of the substituents, solvents, and temperature are described, and solvatochromism and thermochromism are discussed in chapter two, along with hypothesis about mechanisms of these phenomena, which have been presented and based. The photochromic process in anil molecules has been discussed in detail in chapter 3. It is examined by stages, beginning from the very fast ESIPT (primary step) via the structural transformations in the excited states, generation in consecutive order of the fluorescence state with Anomalous (large) Stokes Shift (ASS flu), the twisted TICT-like precursory structure, and the twisted “post TICT” “colored” form in the ground state. The reverse reaction goes via the ground state or the excited state of the colored structure and the ground state proton transfer reaction (GSIPT). The post-TICT hypothesis is based on experimental data and quantum-chemical calculations. The photochromism of the bimolecular structures on the base of anil molecule is discussed in chapter 4 with assumption of interactions of the molecular fragments in the ground and the excited states. A lot of the photochromic systems with the Intramolecular H-bond and ESIPT and without anil molecules (about twenty types of the structures) have been discussed on the base of phenomenological classification of the photochromic properties (chapter 5). The brief consideration of the possible applications, including utilization of the perspective nanostructures as switchers, has been conducted in chapter 6. The material of the book can be used by the researchers, instructors, lecturers, and the students of various levels who work in the area of the reversible photochemical reactions, including photochromism.

Esipt Photochromism

Esipt Photochromism PDF Author: Mikhail Knyazhanskiy
Publisher: Xlibris Corporation
ISBN: 1543477496
Category : Science
Languages : en
Pages : 636

Get Book Here

Book Description
The photochromic anils (Imines of o-hydroxy aldehydes) have been found in the beginning of the last century, and therefore the views of this phenomenon were developing, along with theory of the structure and reaction mechanism and the methods of their investigations. The description of this development has been given shortly in the chapter one. The structure of anils, their properties, and their modifications in dependence of the substituents, solvents, and temperature are described, and solvatochromism and thermochromism are discussed in chapter two, along with hypothesis about mechanisms of these phenomena, which have been presented and based. The photochromic process in anil molecules has been discussed in detail in chapter 3. It is examined by stages, beginning from the very fast ESIPT (primary step) via the structural transformations in the excited states, generation in consecutive order of the fluorescence state with Anomalous (large) Stokes Shift (ASS flu), the twisted TICT-like precursory structure, and the twisted “post TICT” “colored” form in the ground state. The reverse reaction goes via the ground state or the excited state of the colored structure and the ground state proton transfer reaction (GSIPT). The post-TICT hypothesis is based on experimental data and quantum-chemical calculations. The photochromism of the bimolecular structures on the base of anil molecule is discussed in chapter 4 with assumption of interactions of the molecular fragments in the ground and the excited states. A lot of the photochromic systems with the Intramolecular H-bond and ESIPT and without anil molecules (about twenty types of the structures) have been discussed on the base of phenomenological classification of the photochromic properties (chapter 5). The brief consideration of the possible applications, including utilization of the perspective nanostructures as switchers, has been conducted in chapter 6. The material of the book can be used by the researchers, instructors, lecturers, and the students of various levels who work in the area of the reversible photochemical reactions, including photochromism.

Aggregation-Induced Emission (AIE)

Aggregation-Induced Emission (AIE) PDF Author: Jianwei Xu
Publisher: Elsevier
ISBN: 0128243368
Category : Science
Languages : en
Pages : 698

Get Book Here

Book Description
Aggregation-Induced Emission (AIE): A Practical Guide introduces readers to the topic, guiding them through fundamental concepts and the latest advances in applications. The book covers concepts, principles and working mechanisms of AIE in AIE-active luminogens, with different classes of AIE luminogens reviewed, including polymers, three-dimensional frameworks (MOFs and COFs) and supramolecular gels. Special focus is given to the structure-property relationship, structural design strategies, targeted properties and application performance. The book provides readers with a deep understanding, not only on the fundamental principles of AIE, but more importantly, on how AIE luminogens and AIE properties can be incorporated in material development. - Provides the fundamental principles, design and synthesis strategies of aggregation induced emission materials - Reviews the most relevant applications in materials design for stimuli-responsive materials, biomedical applications, chemo-sensing and optoelectronics - Emphasizes structural design and its connection to aggregation induced emission properties, also exploring the structure-property relationship

Photochromic Materials

Photochromic Materials PDF Author: He Tian
Publisher: John Wiley & Sons
ISBN: 3527683704
Category : Technology & Engineering
Languages : en
Pages : 440

Get Book Here

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.

Photochemistry

Photochemistry PDF Author: A. Gilbert
Publisher: Royal Society of Chemistry
ISBN: 9780854044351
Category : Reference
Languages : en
Pages : 476

Get Book Here

Book Description
The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy. This Specialist Periodical Report on Photochemistry aims to provide an annual review of photo-induced processes that have relevance to the above wide-ranging academic and commercial disciplines, and interests in chemistry, physics, biology and technology. In order to provide easy access to this vast and varied literature, each volume of Photochemistry comprises sections concerned with photophysical processes in condensed phases, organic aspects which are sub-divided by chromophore type, polymer photochemistry, and photochemical aspects of solar energy conversion. Volume 34 covers literature published from July 2001 to June 2002. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.

4D Printing, Volume 2

4D Printing, Volume 2 PDF Author: Frederic Demoly
Publisher: John Wiley & Sons
ISBN: 139417151X
Category : Technology & Engineering
Languages : en
Pages : 324

Get Book Here

Book Description
Who hasn’t dreamed of seeing matter transformed in a way that suits you? This is the goal of 4D printing, using materials that can change in terms of shape and property under the effect of energy stimulation. From the description of the actions and actuators, the authors show the weaknesses that limit the industrialization of 4D printing processes; these are the modes of energy stimulation. To prepare for the future, two chapters are introduced: “Material-Process Duality in Industrial 4D Printing” and “How to Approach 4D Printing in Design”. If the capture and reuse of 4D printing knowledge is necessary for this objective, the conclusion leaves the existing myth around the 4D printing theme and proposes a “draft” roadmap that should be the subject of reflection and scientific debate on a concept that is still immature, but full of promise.

CRC Handbook of Organic Photochemistry and Photobiology, Volumes 1 & 2

CRC Handbook of Organic Photochemistry and Photobiology, Volumes 1 & 2 PDF Author: William M. Horspool
Publisher: CRC Press
ISBN: 020349590X
Category : Science
Languages : en
Pages : 2898

Get Book Here

Book Description
The second edition of this best-selling handbook is bigger, more comprehensive, and now completely current. In addition to thorough updates to the discussions featured in the first edition, this edition includes 66 new chapters that reflect recent developments, new applications, and emerging areas of interest. Within the handbook's 145 critically r

Quinone Methides

Quinone Methides PDF Author: S. E. Rokita
Publisher: John Wiley & Sons
ISBN: 9780470452875
Category : Science
Languages : en
Pages : 456

Get Book Here

Book Description
Multidisciplinary perspectives and approaches to quinone methides research The Wiley Series on Reactive Intermediates in Chemistry and Biology investigates reactive intermediates from the broadest possible range of disciplines. The contributions in each volume offer readers fresh insights into the latest findings, emerging applications, and ongoing research in the field from a diverse perspective. This inaugural volume in the series, Quinone Methides, represents the first book devoted to this fascinating and useful intermediate. The authors of this work reflect the many disciplines and approaches to quinone methides research. The volume therefore covers a broad range of topics, including theoretical treatments, generation and detection of intermediates, characterization and applications in chemistry and biochemistry, and biological reactivity. Among the chapters are: Photochemical generation and characterization of quinone methides Quinone methide stabilization by metal complexation Self-immolative dendrimers based on quinone methides Characterization of quinone methides by spectral global fitting and 13C labeling Formation and reactions of xenobiotic quinone methides in biology Quinone methides in lignification With this collection of topics, readers already familiar with quinone methides have the opportunity to advance their own research by discovering new inspiration and opportunities in allied areas. Moreover, the range of topics and perspectives covered make this volume accessible to readers with a broad range of interests, including organic and physical chemistry, biochemistry, biotechnology, and pharmaceutics.

Advances in Organic Crystal Chemistry

Advances in Organic Crystal Chemistry PDF Author: Masami Sakamoto
Publisher: Springer Nature
ISBN: 9811550859
Category : Science
Languages : en
Pages : 532

Get Book Here

Book Description
This book summarizes and records the recent notable advances in diverse topics in organic crystal chemistry, which has made substantial progress along with the rapid development of a variety of analysis and measurement techniques for solid organic materials. This review book is one of the volumes that are published periodically on this theme. The previous volume, published in 2015, systematically summarized the remarkable progress in assorted topics of organic crystal chemistry using organic solids and organic–inorganic hybrid materials during the previous 5 years, and it has been widely read. The present volume also shows the progress of organic solid chemistry in the last 5 years, with contributions mainly by invited members of the Division of Organic Crystal Chemistry of the Chemical Society of Japan (CSJ), together with prominent invited authors from countries other than Japan.

Annual Review

Annual Review PDF Author: Bunshi Kagaku Kenkyūjo
Publisher:
ISBN:
Category : Chemical bonds
Languages : en
Pages : 312

Get Book Here

Book Description


Ultrafast Phenomena XIX

Ultrafast Phenomena XIX PDF Author: Kaoru Yamanouchi
Publisher: Springer
ISBN: 3319132423
Category : Science
Languages : en
Pages : 892

Get Book Here

Book Description
This book presents the latest advances in ultrafast science, including both ultrafast optical technology and the study of ultrafast phenomena. It covers picosecond, femtosecond, and attosecond processes relevant to applications in physics, chemistry, biology, and engineering. Ultrafast technology has a profound impact in a wide range of applications, amongst them biomedical imaging, chemical dynamics, frequency standards, material processing, and ultrahigh-speed communications. This book summarizes the results presented at the 19th International Conference on Ultrafast Phenomena and provides an up-to-date view of this important and rapidly advancing field.