The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Shuichi Hashimoto - One of the best experts on this subject based on the ideXlab platform.
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Zeolite Photochemistry: impact of zeolites on Photochemistry and feedback from Photochemistry to zeolite science
Journal of Photochemistry and Photobiology C-photochemistry Reviews, 2003Co-Authors: Shuichi HashimotoAbstract:The past decade has witnessed increasing activity in Photochemistry within zeolites. This article critically reviews the topics of such activities and provides some comments for future studies. Particular emphasis is placed on transient spectroscopic studies, which have shown to be a powerful technique for mechanistic investigations in solid systems. As a host material for organic species, zeolites are another promising candidate for modifying the photophysics and Photochemistry of a given species. Besides, photochemical reactions can be pursued in zeolites and provide product distributions considerably different from those in solutions. Accordingly, Photochemistry has enjoyed a great benefit from zeolite materials and zeolite science. In return, photochemical techniques can provide pieces of useful information on the fundamental issues of zeolite science such as adsorption and diffusion of molecules within the zeolite. Thus, we can expect further development in this area if this cooperative relationship continues. In this article, we mainly describe mechanistic aspect of photochemical reactions. Issues associated with experimental techniques are also reviewed.
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Zeolite Photochemistry: Impact of zeolites on Photochemistry and feedback from Photochemistry to zeolite science
Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 2003Co-Authors: Shuichi HashimotoAbstract:The past decade has witnessed increasing activity in Photochemistry within zeolites. This article critically reviews the topics of such activities and provides some comments for future studies. Particular emphasis is placed on transient spectroscopic studies, which have shown to be a powerful technique for mechanistic investigations in solid systems. As a host material for organic species, zeolites are another promising candidate for modifying the photophysics and Photochemistry of a given species. Besides, photochemical reactions can be pursued in zeolites and provide product distributions considerably different from those in solutions. Accordingly, Photochemistry has enjoyed a great benefit from zeolite materials and zeolite science. In return, photochemical techniques can provide pieces of useful information on the fundamental issues of zeolite science such as adsorption and diffusion of molecules within the zeolite. Thus, we can expect further development in this area if this cooperative relationship continues. In this article, we mainly describe mechanistic aspect of photochemical reactions. Issues associated with experimental techniques are also reviewed. © 2003 Japanese Photochemistry Association. Published by Elsevier B.V. All rights reserved.
Vaidhyanathan Ramamurthy - One of the best experts on this subject based on the ideXlab platform.
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Photochemistry within a water soluble organic capsule
Accounts of Chemical Research, 2015Co-Authors: Vaidhyanathan RamamurthyAbstract:ConspectusPhotochemistry along with life as we know it originated on earth billions of years ago. Supramolecular Photochemistry had its beginning when plants that sustain life began transforming water into oxygen by carrying out light initiated reactions within highly organized assemblies. Prompted by the efforts of J. Priestly (photosynthesis), F. Sestini, S. Cannizaro, and C. Liebermann (solid-state Photochemistry of santonin, quinones, and cinnamic acid), orderly scientific investigations of the link between light absorption by matter and molecules and the chemical and physical consequences began in the mid-1700s. By 1970 when Molecular Photochemistry had matured, it was clear that controlling photochemical reactions by conventional methods of varying reaction parameters like temperature and pressure would be futile due to the photoreactions’ very low activation energies and enthalpies.During the last 50 years, the excited state behavior of molecules has been successfully manipulated with the use of co...
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principles of molecular Photochemistry an introduction
2008Co-Authors: Nicholas J. Turro, Vaidhyanathan Ramamurthy, Juan C. ScaianoAbstract:Preface Molecular Photochemistry of Organic Compounds: An Overview Electronic, Vibrational, and Spin Configurations of Electronically Excited States Transitions Between States: Photophysical Processes Radiative Transitions Between Electronic States Photophysical Radiationless Transitions A Theory of Molecular Organic Photochemistry Energy Transfer and Electron Transfer Index
Timothy Noël - One of the best experts on this subject based on the ideXlab platform.
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Solar Photochemistry in Flow
Topics in Current Chemistry, 2018Co-Authors: Dario Cambié, Timothy NoëlAbstract:In recent years, Photochemistry has been a highly active research field. This renaissance is linked to the upsurge of photoredox catalysis, a versatile platform for synthetic methodologies using visible light photons as a traceless reagent. In contrast with UV, visible light constitutes almost half of the ground solar irradiance, making the use of solar light in chemistry a sustainable and viable possibility. However, the direct use of sunlight to power chemical reactions is still little explored. This can be explained by both the hurdles associated with solar radiation (e.g., its variability, irreproducibility, high IR content, etc.) and the need for a specialized photoreactor. Most of these issues can be tackled with technological solutions, and especially with the recourse to flow chemistry. Flow chemistry goes hand in hand with Photochemistry thanks to the uniform irradiation it provides to the reaction. Furthermore, a continuous-flow reactor can be easily integrated with different solar collectors (including compound parabolic concentrators and luminescent solar concentrators) and constitutes the most efficient approach to solar Photochemistry. After a description of the characteristics of the solar radiation relevant to chemistry, this chapter critically describes the different type of solar photoreactors and their applications in synthetic organic chemistry. Finally, an outlook on the future of solar Photochemistry in flow is included.
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applications of continuous flow Photochemistry in organic synthesis material science and water treatment
Chemical Reviews, 2016Co-Authors: Dario Cambié, Cecilia Bottecchia, Natan J W Straathof, Volker Hessel, Timothy NoëlAbstract:Continuous-flow Photochemistry in microreactors receives a lot of attention from researchers in academia and industry as this technology provides reduced reaction times, higher selectivities, straightforward scalability, and the possibility to safely use hazardous intermediates and gaseous reactants. In this review, an up-to-date overview is given of photochemical transformations in continuous-flow reactors, including applications in organic synthesis, material science, and water treatment. In addition, the advantages of continuous-flow Photochemistry are pointed out and a thorough comparison with batch processing is presented.
Kevin I Bookermilburn - One of the best experts on this subject based on the ideXlab platform.
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flow Photochemistry old light through new windows
Beilstein Journal of Organic Chemistry, 2012Co-Authors: Jonathan P Knowles, Luke D. Elliott, Kevin I BookermilburnAbstract:Synthetic Photochemistry carried out in classic batch reactors has, for over half a century, proved to be a powerful but under-utilised technique in general organic synthesis. Recent developments in flow Photochemistry have the potential to allow this technique to be applied in a more mainstream setting. This review highlights the use of flow reactors in organic Photochemistry, allowing a comparison of the various reactor types to be made.
Dario Cambié - One of the best experts on this subject based on the ideXlab platform.
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Solar Photochemistry in Flow
Topics in Current Chemistry, 2018Co-Authors: Dario Cambié, Timothy NoëlAbstract:In recent years, Photochemistry has been a highly active research field. This renaissance is linked to the upsurge of photoredox catalysis, a versatile platform for synthetic methodologies using visible light photons as a traceless reagent. In contrast with UV, visible light constitutes almost half of the ground solar irradiance, making the use of solar light in chemistry a sustainable and viable possibility. However, the direct use of sunlight to power chemical reactions is still little explored. This can be explained by both the hurdles associated with solar radiation (e.g., its variability, irreproducibility, high IR content, etc.) and the need for a specialized photoreactor. Most of these issues can be tackled with technological solutions, and especially with the recourse to flow chemistry. Flow chemistry goes hand in hand with Photochemistry thanks to the uniform irradiation it provides to the reaction. Furthermore, a continuous-flow reactor can be easily integrated with different solar collectors (including compound parabolic concentrators and luminescent solar concentrators) and constitutes the most efficient approach to solar Photochemistry. After a description of the characteristics of the solar radiation relevant to chemistry, this chapter critically describes the different type of solar photoreactors and their applications in synthetic organic chemistry. Finally, an outlook on the future of solar Photochemistry in flow is included.
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applications of continuous flow Photochemistry in organic synthesis material science and water treatment
Chemical Reviews, 2016Co-Authors: Dario Cambié, Cecilia Bottecchia, Natan J W Straathof, Volker Hessel, Timothy NoëlAbstract:Continuous-flow Photochemistry in microreactors receives a lot of attention from researchers in academia and industry as this technology provides reduced reaction times, higher selectivities, straightforward scalability, and the possibility to safely use hazardous intermediates and gaseous reactants. In this review, an up-to-date overview is given of photochemical transformations in continuous-flow reactors, including applications in organic synthesis, material science, and water treatment. In addition, the advantages of continuous-flow Photochemistry are pointed out and a thorough comparison with batch processing is presented.
