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Author: Mikkel Bregnhøj Publisher: Springer ISBN: 3030031837 Category : Science Languages : en Pages : 162
Book Description
This book presents the fundamentals and the state of the art of the photophysics of molecular oxygen. The author examines optical transitions between the lowest-lying electronic states in molecular oxygen and how these transitions respond to perturbation, either from an organic molecule or from the plasmon field of a metal nanoparticle. We live on a planet filled with light and oxygen. The interaction between these two components forms the basis of excited state chemistry spanning the fields of synthetic organic chemistry, materials chemistry, molecular biology, and photodynamic treatment of cancer. Still, the fundamental ways in which oxygen is affected by light is an active subject of research and is continually being developed and rationalized. In this book, readers will learn that singlet oxygen, the excited state of oxygen that exhibits unique chemical reactivity, can be selectively made via direct optical excitation of oxygen in a sensitizer-free system. Readers will also discover that this approach can perturb living cells differently depending on the singlet oxygen “dose”.
Author: Mikkel Bregnhøj Publisher: Springer ISBN: 3030031837 Category : Science Languages : en Pages : 162
Book Description
This book presents the fundamentals and the state of the art of the photophysics of molecular oxygen. The author examines optical transitions between the lowest-lying electronic states in molecular oxygen and how these transitions respond to perturbation, either from an organic molecule or from the plasmon field of a metal nanoparticle. We live on a planet filled with light and oxygen. The interaction between these two components forms the basis of excited state chemistry spanning the fields of synthetic organic chemistry, materials chemistry, molecular biology, and photodynamic treatment of cancer. Still, the fundamental ways in which oxygen is affected by light is an active subject of research and is continually being developed and rationalized. In this book, readers will learn that singlet oxygen, the excited state of oxygen that exhibits unique chemical reactivity, can be selectively made via direct optical excitation of oxygen in a sensitizer-free system. Readers will also discover that this approach can perturb living cells differently depending on the singlet oxygen “dose”.
Author: O.M. Belotserkovskii Publisher: Springer Science & Business Media ISBN: 146132467X Category : Science Languages : en Pages : 697
Book Description
100 keV) of neutral hydrogen 7 atoms . The design of the cesium jettarget intended to achieve the 7 following goals : - Supersonic nozzle - cooled skimmer system to increase the fraction 8 of the total nozzle flux Jn which is used as the jettarget flux Jt, 8 = Jt/Jn, from low values 8
Author: Santi Nonell Publisher: Royal Society of Chemistry ISBN: 1782620389 Category : Science Languages : en Pages : 488
Book Description
Meeting the desire for a comprehensive book that collects and curates the vast amount of knowledge gained in the field of singlet oxygen, this title covers the physical, chemical and biological properties of this reactive oxygen species and also its increasingly important applications across chemical, environmental and biomedical areas.The editors have a long and distinguished background in the field of singlet oxygen chemistry and biomedical applications, giving them a unique insight and ensuring the contributions attain the highest scientific level.The book provides an up to date reference resource for both the beginner and experienced researcher and crucially for those working across disciplines such as photochemistry, photobiology and photomedicine.
Author: NA. WANG Publisher: ISBN: 9781361370407 Category : Languages : en Pages :
Book Description
This dissertation, "Electronic Transitions of Transition Metal Monoboride and Monoxides" by Na, Wang, 王娜, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled ELECTRONIC TRANSITIONS OF TRANSITION METAL MONOBORIDE AND MONOXIDES Submitted by WANG NA For the degree of Doctor of Philosophy at The University of Hong Kong in December 2014 This thesis reports the study of electronic transitions of transition metal monoboride and monoxides using the technique of laser ablation/reaction free jet expansion with laser‒induced fluorescence (LIF) spectroscopy and optical‒optical double resonance (OODR) spectroscopy. The molecules of interest in this investigation include the ruthenium monoboride (RuB), ruthenium monoxide (RuO), scandium monoxide (ScO) and yttrium monoxide (YO) molecules. The RuB and RuO were produced by reacting the ruthenium metal atoms generated using laser ablation with 0.5% diborane (B H ) and 6% nitrous oxide (N O) seeded in argon respectively, 2 6 2 and the ScO and YO molecules were generated with their corresponding metal atoms with 10% oxygen (O ) seeded in argon. Electronic transition spectra of these molecules were recorded using tunable pulsed dye laser and optical parametric oscillator (OPO) laser systems. 2 For the RuB molecule, three vibrational bands of the [18.4]2.5 ‒ X Δ 5/2 electronic transition systems were recorded and rotationally analyzed using LIF spectroscopy in the visible region. The bond length r and ΔG of ground state of o 1/2 -1 RuB molecule were determined to be 1.7099 A and 911.02 cm, respectively. This research represents the first experimental study of the RuB molecule. Using LIF spectroscopy, four electronic transition systems of the RuO molecule were observed 5 5 and analyzed, which include the [18.1] Ω = 4 - X Δ, [16.0] Ω = 5 - X Δ, [18.1] Ω = 4 4 5 5 3 - X Δ, and [15.8] Ω = 4 - X Δ systems. The ground state was confirmed to be a 3 3 X Δ state and the bond length of upper states were also determined. For the ScO molecule, ten vibrational bands were observed in the region between 280 and 320 nm 2 + via the intermediate B Σ electronic state using OODR spectroscopy, seven of them 2 + 2 + belong to four transition systems namely: [33.41]0.5 - B Σ, [32.92]1.5 - B Σ, 4 + 2 + 2 + 2 + [32.85] Σ - B Σ and [34.00] Σ - B Σ systems. This is the first time a quartet electronic state of the ScO molecule has been identified and studied. Similar to the 2 + ScO molecule, twelve vibrational bands were observed via the intermediate B Σ electronic state. These transitions were analyzed and classified into four transition 2 + 2 + 2 + 2 + 4 - systems including Ω = 0.5 - B Σ, Ω = 1.5 - B Σ, [34.1] Σ - B Σ and [33.7] Σ - 2 + B Σ systems. Molecular constants for the observed electronic states of these molecules were determined by least squares fitting of the measured resolved rotational lines. Furthermore, molecular orbital energy level diagrams were constructed to explain the studied electronic states and the electronic structure of these molecules. DOI: 10.5353/th_b5387996 Subjects: Transition metal oxides Transition metal compounds Borides
Author: Thomas Oppenländer Publisher: John Wiley & Sons ISBN: 3527610898 Category : Science Languages : en Pages : 383
Book Description
While the treatment of water and exhaust gas using ultraviolet (UV) light offers both ecological and economic advantages, information on photo-initiated advanced oxidation technologies (AOTs) has been dispersed among various journals and proceedings until now. This authoritative and comprehensive handbook is the first to cover both the photochemical fundamentals and practical applications, including a description of advanced oxidation processes (AOPs) and process engineering of suitable photoreactors. The author presents various real-world examples, including economic aspects, while many references to current scientific literature facilitate access to current research topics relevant for water and air industries. Throughout, over 140 detailed figures visualize photochemical and photophysical phenomena, and help in interpreting important research results. From the foreword by James R. Bolton (President of Bolton Photosciences Inc., Executive Director of the International Ultraviolet Association (IUVA)): "Prof. Oppenländer is well qualified to write about the AOPs/AOTs, since he has contributed to this literature in a very significant manner. This book will be of considerable value to graduate students, science and engineering faculty, scientists, process engineers and sales engineers in industry, government regulators and health professionals."
Author: Mikkel Bregnhøj
Author: Mikkel Bregnhøj
Author: S. H. Whitlow
Author: O.M. Belotserkovskii
Author: Santi Nonell
Author: 
Author: Aryeh A. Frimer
Author: NA. WANG
Author: Thomas Oppenländer
Author: 
Author: Arthur P. Schaap