Photoinduced Intramolecular Charge Transfer In Donor Acceptor Biaryls And Resulting Applicational Aspects Regarding Fluorescent Probes And Solar Energy Conversion

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Photoinduced Intramolecular Charge Transfer in Donor-Acceptor Biaryls and Resulting Applicational Aspects Regarding Fluorescent Probes and Solar Energy Conversion

Author : Michael Maus
Publisher : Universal-Publishers
ISBN 13 : 1581120303
Total Pages : 223 pages
Book Rating : 4.5/5 (811 download)

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Book Synopsis Photoinduced Intramolecular Charge Transfer in Donor-Acceptor Biaryls and Resulting Applicational Aspects Regarding Fluorescent Probes and Solar Energy Conversion by : Michael Maus

Download or read book Photoinduced Intramolecular Charge Transfer in Donor-Acceptor Biaryls and Resulting Applicational Aspects Regarding Fluorescent Probes and Solar Energy Conversion written by Michael Maus and published by Universal-Publishers. This book was released on 1998 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is focused on the effects of photoinduced intramolecular charge transfer (CT) in three differently twisted donor-acceptor (D-A) biphenyls. Taking into account a further pair of differently twisted D-A biaryls new universal insights into the photoinduced electronic and conformation dynamics of D-A biaryls are obtained. Furthermore, possible applications in fields of solar energy conversion and fluorescence sensing of microenvironments are demonstrated. Experimental means of stationary and time-resolved (ps to s) luminescence, transient absorption (sub-ps), polarization spectroscopy, high pressure and low temperature techniques are employed in conjunction with quantum chemical calculations. Twist angle and solvent dependent electron transfer (ET) interactions between the D and A aryl moieties are responsible for the low lying and solvatochromic intramolecular CT electron band which gains unusually high intensity through strong electronic coupling of the pure 1ET with the ground (S0) and 1La state. As regards the class of biaryl compounds, for the first time, an excited state electron transfer from the D to the A could be monitored by dual spectrally separated stimulated fluorescence bands with precursor-successor relationship on a sub-ps timescale for the D-A biphenyls. It is concluded that, in additon to the electronic interaction of 1ET with S0 and 1La, the electronic interaction with a close lying 1Lb state plays a fundamental role in the ET dynamics and the 1CT-S0 transition probability in D-A biaryls. The initial photoinduced conformational relaxation occurs towards planarity in all biaryls investigated. However, various results evidence that the highly twisted D-A biphenyl additionally performs a slow "excited state intramolecular back twist rotation" leading to a solvent polarity dependent conformational equilibrium between a more planar (CT) and a more twisted (CTR) conformer in S1(1CT). Using global analysis of the biexponential fluorescence decays as a function of temperature and pressure in medium polar solvents, the kinetics, thermodynamics, viscosity control and decomposed emission spectra associated with this adiabatic photoreaction are determined. The twist angle dependent ability of the D-A biphenyls to serve as fluorescent probes of micropolarity, changes of microviscosity or matrix order, protic solvents and pH is investigated. In particular, fluorescence sensing of pH seems to be promising.

Polymers in Organic Electronics

Author : Sulaiman Khalifeh
Publisher : Elsevier
ISBN 13 : 192788568X
Total Pages : 617 pages
Book Rating : 4.9/5 (278 download)

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Book Synopsis Polymers in Organic Electronics by : Sulaiman Khalifeh

Download or read book Polymers in Organic Electronics written by Sulaiman Khalifeh and published by Elsevier. This book was released on 2020-04-01 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers in Organic Electronics: Polymer Selection for Electronic, Mechatronic, and Optoelectronic Systems provides readers with vital data, guidelines, and techniques for optimally designing organic electronic systems using novel polymers. The book classifies polymer families, types, complexes, composites, nanocomposites, compounds, and small molecules while also providing an introduction to the fundamental principles of polymers and electronics. Features information on concepts and optimized types of electronics and a classification system of electronic polymers, including piezoelectric and pyroelectric, optoelectronic, mechatronic, organic electronic complexes, and more. The book is designed to help readers select the optimized material for structuring their organic electronic system.Chapters discuss the most common properties of electronic polymers, methods of optimization, and polymeric-structured printed circuit boards. The polymeric structures of optoelectronics and photonics are covered and the book concludes with a chapter emphasizing the importance of polymeric structures for packaging of electronic devices. Provides key identifying details on a range of polymers, micro-polymers, nano-polymers, resins, hydrocarbons, and oligomers Covers the most common electrical, electronic, and optical properties of electronic polymers Describes the underlying theories on the mechanics of polymer conductivity Discusses polymeric structured printed circuit boards, including their rapid prototyping and optimizing their polymeric structures Shows optimization methods for both polymeric structures of organic active electronic components and organic passive electronic components

Topics in Fluorescence Spectroscopy

Author : Joseph R. Lakowicz
Publisher : Springer Science & Business Media
ISBN 13 : 0306447843
Total Pages : 524 pages
Book Rating : 4.3/5 (64 download)

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Book Synopsis Topics in Fluorescence Spectroscopy by : Joseph R. Lakowicz

Download or read book Topics in Fluorescence Spectroscopy written by Joseph R. Lakowicz and published by Springer Science & Business Media. This book was released on 1994-11-30 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-resolved fluorescence spectroscopy is widely used as a research tool in bioch- istry and biophysics. These uses of fluorescence have resulted in extensive knowledge of the structure and dynamics of biological macromolecules. This information has been gained by studies of phenomena that affect the excited state, such as the local environment, quenching processes, and energy transfer. Topics in Fluorescence Spectroscopy, Volume 4: Probe Design and Chemical Sensing reflects a new trend, which is the use of time-resolved fluorescence in analytical and clinical chemistry. These emerging applications of time-resolved fluorescence are the result of continued advances in laser detector and computer technology. For instance, pho- multiplier tubes (PMT) were previously bulky devices. Miniature PMTs are now available, and the performance of simpler detectors is continually improving. There is also considerable effort to develop fluorophores that can be excited with the red/ne- infrared (NIR) output of laser diodes. Using such probes, one can readily imagine small time-resolved fluorometers, even hand-held devices, being used fordoctor’s office or home health care.

Semiconducting and Metallic Polymers

Author : Alan J. Heeger
Publisher : OUP Oxford
ISBN 13 : 0198528647
Total Pages : 288 pages
Book Rating : 4.1/5 (985 download)

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Book Synopsis Semiconducting and Metallic Polymers by : Alan J. Heeger

Download or read book Semiconducting and Metallic Polymers written by Alan J. Heeger and published by OUP Oxford. This book was released on 2010-07-29 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique properties of conducting and semiconducting (conjugated) polymers make them one of the most attractive areas of interdisciplinary materials science and technology. Written by a pioneer in the field, this book is the first aimed at teaching graduate students, postdoctoral scientists, and specialists in industry about this exciting field.

Molecular Fluorescence

Author : Bernard Valeur
Publisher : John Wiley & Sons
ISBN 13 : 3527328467
Total Pages : 595 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Molecular Fluorescence by : Bernard Valeur

Download or read book Molecular Fluorescence written by Bernard Valeur and published by John Wiley & Sons. This book was released on 2013-03-25 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of the well-established bestseller is completely updated and revised with approximately 30 % additional material, including two new chapters on applications, which has seen the most significant developments. The comprehensive overview written at an introductory level covers fundamental aspects, principles of instrumentation and practical applications, while providing many valuable tips. For photochemists and photophysicists, physical chemists, molecular physicists, biophysicists, biochemists and biologists, lecturers and students of chemistry, physics, and biology.

Glucose Sensing

Author : Chris D. Geddes
Publisher : Springer Science & Business Media
ISBN 13 : 0387330151
Total Pages : 460 pages
Book Rating : 4.3/5 (873 download)

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Book Synopsis Glucose Sensing by : Chris D. Geddes

Download or read book Glucose Sensing written by Chris D. Geddes and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential reference for any laboratory working in the analytical fluorescence glucose sensing field. The increasing importance of these techniques is typified in one emerging area by developing non-invasive and continuous approaches for physiological glucose monitoring. This volume incorporates analytical fluorescence-based glucose sensing reviews, specialized enough to be attractive to professional researchers, yet appealing to a wider audience of scientists in related disciplines of fluorescence.

Time-resolved Vibrational Spectroscopy

Author : George H. Atkinson
Publisher : Taylor & Francis
ISBN 13 : 9782881241918
Total Pages : 442 pages
Book Rating : 4.2/5 (419 download)

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Book Synopsis Time-resolved Vibrational Spectroscopy by : George H. Atkinson

Download or read book Time-resolved Vibrational Spectroscopy written by George H. Atkinson and published by Taylor & Francis. This book was released on 1987 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1987. Routledge is an imprint of Taylor & Francis, an informa company.

Iptycenes Chemistry

Author : Chuan-Feng Chen
Publisher : Springer Science & Business Media
ISBN 13 : 3642328881
Total Pages : 384 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis Iptycenes Chemistry by : Chuan-Feng Chen

Download or read book Iptycenes Chemistry written by Chuan-Feng Chen and published by Springer Science & Business Media. This book was released on 2012-12-02 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Iptycenes Chemistry: From Synthesis to Applications provides a comprehensive overview of the development of iptycene chemistry in the past seventy years. This book covers: (1) the basic nomenclature and general properties of iptycenes and their derivatives; (2) the synthesis and functionalization reactions of triptycenes, pentiptycenes, higher iptycenes, heterotriptycenes, and homotriptycenes; (3) the methods for the preparation of iptycene-based polymers with different types; and (4) the applications of iptycenes and their derivatives in molecular machines, materials science, host-guest chemistry, self-assembly, coordination chemistry, physical organic chemistry, medicinal chemistry, and so on. Consequently, such a book is not only helpful to researchers working in iptycene chemistry, but can also facilitate future research in wide areas.

Single Molecule Spectroscopy

Author : R. Rigler
Publisher : Springer Science & Business Media
ISBN 13 : 3642565441
Total Pages : 375 pages
Book Rating : 4.6/5 (425 download)

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Book Synopsis Single Molecule Spectroscopy by : R. Rigler

Download or read book Single Molecule Spectroscopy written by R. Rigler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topics range from single molecule experiments in quantum optics and solid-state physics to analogous investigations in physical chemistry and biophysics.

Click Triazoles

Author : Janez Košmrlj
Publisher : Springer
ISBN 13 : 3642294294
Total Pages : 236 pages
Book Rating : 4.6/5 (422 download)

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Book Synopsis Click Triazoles by : Janez Košmrlj

Download or read book Click Triazoles written by Janez Košmrlj and published by Springer. This book was released on 2012-05-30 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: B. R. Buckley and H. Heaney: Mechanistic Investigations of Copper(I)- Catalyzed Alkyne–Azide Cycloaddition Reactions.- J. D. Crowley and D. A. McMorran: “Click-Triazole” Coordination Chemistry: Exploiting 1,4-Disubstituted-1,2,3-Triazoles as Ligands.- S. Lee and A. H. Flood: Binding Anions in Rigid and Reconfigurable Triazole Receptors.- M. Watkinson: Click Triazoles as Chemosensors.- H.-F. Chow, C.-M. Lo and Y. Chen: Triazole-Based Polymer Gels.- T. Zheng, S. H. Rouhanifard, A. S. Jalloh, P. Wu: Click Triazoles for Bioconjugation.- S. Mignani, Y. Zhou, T. Lecourt and L. Micouin: Recent Developments in the Synthesis 1,4,5-Trisubstituted Triazoles.

Quantum Mechanical First Principles Calculations of the Electronic and Magnetic Structure of Fe-Bearing Rock-Forming Silicates

Author : Danylo Zherebetskyy
Publisher : Universal-Publishers
ISBN 13 : 1599423162
Total Pages : 138 pages
Book Rating : 4.5/5 (994 download)

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Book Synopsis Quantum Mechanical First Principles Calculations of the Electronic and Magnetic Structure of Fe-Bearing Rock-Forming Silicates by : Danylo Zherebetskyy

Download or read book Quantum Mechanical First Principles Calculations of the Electronic and Magnetic Structure of Fe-Bearing Rock-Forming Silicates written by Danylo Zherebetskyy and published by Universal-Publishers. This book was released on 2010 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this thesis is the study of the electronic and magnetic structure of three representative members of Fe-bearing rock-forming silicates, viz. orthoferrosilite (Fe2+2Si2O6), almandine (Fe2+3Al2(SiO4)3) and andradite (Ca3Fe3+2(SiO4)3). These minerals have attracted significant attention due to their abundance in the Earth's crust and mantle, and because crystallised silicates are main components of cosmic dust which is the most abundant raw material in the Universe. For this purpose quantum mechanical first principles electronic structure calculations are performed by the most efficient DFT method in the local spin-density approximation for calculating spectroscopic data: the spin-polarized self consistent charge Xa method. The specific feature and strength of these investigations consist in the theoretical characterization of these complex systems based on experimental results. This means that, on one hand, experimental spectroscopic and crystallographic data are being used to judge the reliability of the calculations, whereas, on the other hand, experimental data are interpreted and explained by the theoretical results. This work comprises seven chapters. After a brief introduction (Chapter 1) Chapter 2 describes the theoretical bases, ideas, approximations and advantages of the SCC- Xa method and basics of the art of cluster construction. Chapter 3 considers physical bases of crystal field theory, absorption, Mossbauer spectroscopy and magnetic interactions, as well as the calculation of spectroscopic data within the frame of the SCC-Xa method. In addition, tetragonally, trigonally and angularly distorted octahedral sites with various degrees of the distortions are calculated and analyzed. The electronic and magnetic structures of orthoferrosilite, almandine and andradite are described in the following chapters. In the case of orthoferrosilite the magnetic interactions between the iron spins within the ribbons and between neighboring ribbons are characterized. Two identical interpenetrating magnetic sublattices of circles of 10 edge-shared dodecahedra are revealed and characterized in almandine. The calculated spin structure explains and solves the controversy in the interpretation of the Mossbauer spectra of almandine below the Neel temperature. For andradite a model of the magnetic structure is proposed based on geometrical considerations and the calculated spin coupling constants for the various interaction pathways. According to this model, the magnetic structure of andradite consists of two frustrated equivalent magnetic sublattices. The spins of the Fe ions within each sublattice are coupled antiferromagnetically. The derived spin pattern explains two sextets in the Mossbauer spectra of andradite below the Neel temperature. Finally, the main results are summarized in Chapter 7.

Heterogeneous Photocatalysis

Author : Juan Carlos Colmenares
Publisher : Springer
ISBN 13 : 3662487195
Total Pages : 416 pages
Book Rating : 4.6/5 (624 download)

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Book Synopsis Heterogeneous Photocatalysis by : Juan Carlos Colmenares

Download or read book Heterogeneous Photocatalysis written by Juan Carlos Colmenares and published by Springer. This book was released on 2015-12-24 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book explains the principles and fundamentals of photocatalysis and highlights the current developments and future potential of the green-chemistry-oriented applications of various inorganic, organic, and hybrid photocatalysts. The book consists of eleven chapters, including the principles and fundamentals of heterogeneous photocatalysis; the mechanisms and dynamics of surface photocatalysis; research on TiO2-based composites with unique nanostructures; the latest developments and advances in exploiting photocatalyst alternatives to TiO2; and photocatalytic materials for applications other than the traditional degradation of pollutants, such as carbon dioxide reduction, water oxidation, a complete spectrum of selective organic transformations and water splitting by photocatalytic reduction. In addition, heterogeneized polyoxometalate materials for photocatalytic purposes and the proper design of photocatalytic reactors and modeling of light are also discussed. This book appeals to a wide readership of the academic and industrial researchers and it can also be used in the classroom for undergraduate and graduate students focusing on heterogeneous photocatalysis, sustainable chemistry, energy conversion and storage, nanotechnology, chemical engineering, environmental protection, optoelectronics, sensors, and surface and interface science. Juan Carlos Colmenares is a Professor at the Institute of Physical Chemistry, Polish Academy of Sciences, Poland. Yi-Jun Xu is a Professor at the State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, China.

Heterocycles via Cross Dehydrogenative Coupling

Author : Ananya Srivastava
Publisher : Springer Nature
ISBN 13 : 9811391440
Total Pages : 494 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis Heterocycles via Cross Dehydrogenative Coupling by : Ananya Srivastava

Download or read book Heterocycles via Cross Dehydrogenative Coupling written by Ananya Srivastava and published by Springer Nature. This book was released on 2019-08-23 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the developments in the synthesis and functionalization of different heterocycles based on the formation of carbon-carbon (C-C) and carbon-heteroatom (C-X) bonds using cross-dehydrogenative coupling (CDC). Consisting of 13 chapters, the book systematically describes the advances in the synthesis and functionalization of nitrogen, oxygen, and sulfur-containing heterocycles. It also discusses the various mechanistic pathways to help readers gain an in-depth understanding of the CDC reactions of heterocycles. Lastly, in order to promote green chemistry, it addresses a range of metal-free CDC reactions of heterocycles – an area that has attracted significant attention in both academic and industrial research.

New Frontiers in Photochromism

Author : Masahiro Irie
Publisher : Springer Science & Business Media
ISBN 13 : 4431542914
Total Pages : 298 pages
Book Rating : 4.4/5 (315 download)

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Book Synopsis New Frontiers in Photochromism by : Masahiro Irie

Download or read book New Frontiers in Photochromism written by Masahiro Irie and published by Springer Science & Business Media. This book was released on 2013-05-27 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Handbook of Porphyrin Science: with Applications to Chemistry, Physics, Materials Science, Engineering, Biology and Medicine (volume 5)

Author : Karl M. Kadish
Publisher : World Scientific
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4./5 ( download)

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Book Synopsis Handbook of Porphyrin Science: with Applications to Chemistry, Physics, Materials Science, Engineering, Biology and Medicine (volume 5) by : Karl M. Kadish

Download or read book Handbook of Porphyrin Science: with Applications to Chemistry, Physics, Materials Science, Engineering, Biology and Medicine (volume 5) written by Karl M. Kadish and published by World Scientific. This book was released on 2010 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first set of Handbook of Porphyrin Science.Porphyrins, phthalocyanines and their numerous analogues and derivatives are materials of tremendous importance in chemistry, materials science, physics, biology and medicine. They are the red color in blood (heme) and the green in leaves (chlorophyll); they are also excellent ligands that can coordinate with almost every metal in the Periodic Table. Grounded in natural systems, porphyrins are incredibly versatile and can be modified in many ways; each new modification yields derivatives demonstrated new chemistry, physics and biology, with a vast array of medicinal and technical applications.As porphyrins are currently employed as platforms for study of theoretical principles and applications in a wide variety of fields, the Handbook of Porphyrin Science represents a timely ongoing series dealing in detail with the synthesis, chemistry, physicochemical and medical properties and applications of polypyrrole macrocycles. Professors Karl Kadish, Kevin Smith and Roger Guilard are internationally recognized experts in the research field of porphyrins, each having his own separate area of expertise in the field. Between them, they have published over 1500 peer-reviewed papers and edited more than three dozen books on diverse topics of porphyrins and phthalocyanines. In assembling the new volumes of this unique Handbook, they have selected and attracted the very best scientists in each sub-discipline as contributing authors of the chaptersThis Handbook will prove to be a modern authoritative treatise on the subject as it is a collection of up-to-date works by world-renowned experts in the field. Complete with hundreds of figures, tables and structural formulas, and thousands of literature citations, all researchers and graduate students in this field will find the Handbook of Porphyrin Science an essential, major reference source for many years to come.

Chiroptical Molecular Switches

Author : Anne Marie Schoevaars
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Chiroptical Molecular Switches by : Anne Marie Schoevaars

Download or read book Chiroptical Molecular Switches written by Anne Marie Schoevaars and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Synthetic Photochemistry

Author : Angelo Albini
Publisher : John Wiley & Sons
ISBN 13 : 3527323910
Total Pages : 498 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Handbook of Synthetic Photochemistry by : Angelo Albini

Download or read book Handbook of Synthetic Photochemistry written by Angelo Albini and published by John Wiley & Sons. This book was released on 2010-02-01 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique in its focus on preparative impact rather than mechanistic details, this handbook provides an overview of photochemical reactions classed according to the structural feature that is built in the photochemical step, so as to facilitate use by synthetic chemists unfamiliar with this topic. An introductory section covers practical questions on how to run a photochemical reaction, while all classes of the most important photocatalytic reactions are also included. Perfect for organic synthetic chemists in academia and industry.