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: Max Diem Publisher: John Wiley & Sons ISBN: 3527829601 Category : Science Languages : en Pages : 290
Book Description
A concise textbook bridging quantum theory and spectroscopy! Designed as a practical text, Quantum Mechanical Foundations of Molecular Spectroscopy covers the quantum mechanical fundamentals of molecular spectroscopy from the view of a professional spectroscopist, rather than a theoretician. Written by a noted expert on the topic, the book puts the emphasis on the relationship between spectroscopy and quantum mechanics, and provides the background information and derivations of the subjects needed to understand spectroscopy including: stationary energy states, transitions between these states, selection rules, and symmetry. The phenomenal growth of all forms of spectroscopy over the past eight decades has contributed enormously to our understanding of molecular structure and properties. Today spectroscopy covers a broad field including the modern magnetic resonance techniques, non-linear, laser and fiber-based spectroscopy, surface and surface-enhanced spectroscopy, pico- and femtosecond time resolved spectroscopy, and many more. This up-to-date resource discusses several forms of spectroscopy that are used in many fields of science, such as fluorescence, surface spectroscopies, linear and non-linear Raman spectroscopy and spin spectroscopy. This important text: Contains the physics and mathematics needed to understand spectroscopy Explores spectroscopic methods the are widely used in chemistry, biophysics, biology, and materials science Offers a text written by an experienced lecturer and practitioner of spectroscopic methods Includes detailed explanations and worked examples Written for chemistry, biochemistry, material sciences, and physics students, Quantum Mechanical Foundations of Molecular Spectroscopy provides an accessible text for understanding molecular spectroscopy.
Author: Mikkel Bregnhøj
Author: S. H. Whitlow
Author: O.M. Belotserkovskii
Author: Santi Nonell
Author: Aryeh A. Frimer
Author: 
Author: NA. WANG
Author: Arthur P. Schaap
Author: 
Author: Max Diem