Author: 吳育煒Publisher:
ISBN:
Category : Borides
Languages : en
Pages : 0
Book Description
Electronic Transitions of Transition Metal Monoborides
Author: 吳育煒Electronic Transitions of Transition Metal Monoborides
Author: Yuk-Wai NgPublisher: Open Dissertation Press
ISBN: 9781361330739
Category :
Languages : en
Pages :
Book Description
This dissertation, "Electronic Transitions of Transition Metal Monoborides" by Yuk-wai, Ng, 吳育煒, 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. DOI: 10.5353/th_b5153703 Subjects: Transition metal compounds Borides
Electronic Transitions of Transition Metal Monoboride and Monoxides
Author: 王娜Electronic Transitions of Transition Metal Monoboride and Monoxides
Author: Na WangPublisher: Open Dissertation Press
ISBN: 9781361370391
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
Electronic Spectra of Transitions Metal Complexes
Author: Vinod JenaPublisher: Lulu.com
ISBN: 1329059875
Category : Reference
Languages : en
Pages : 93
Book Description
This books will provides a conceptual parts of Electronic spectra of various transition metal complexes, which is useful for various competitive examinations.
Electronic and Vibronic Spectra of Transition Metal Complexes II
Author: Hartmut YersinPublisher: Springer Science & Business Media
ISBN: 9783540629221
Category : Science
Languages : en
Pages : 276
Book Description
The unique properties and applications of transition metal compounds have long fascinated both physicists and chemists. This volume presents theoretical and experimental studies for a deeper understanding of the electronic and vibronic properties of these compounds. In particular, an introduction into properties of spin sublevels of dd*, dÂ*, and ÂÂ* states is given, and a modern ligand field theory based on the Angular Overlap Model is presented. In experimental case studies it is shown how to characterize different types of electronic transitions using modern methods of laser spectroscopy. Consequences of spin-orbit coupling, zero-field splittings, spin-lattice relaxations, chromophore-matrix interactions, Herzberg-Teller/Franck-Condon activities, and localization/delocalization properties are treated.
Transition Metal Compounds
Author: Daniel I. KhomskiiPublisher: Cambridge University Press
ISBN: 1316060802
Category : Science
Languages : en
Pages : 501
Book Description
Describing all aspects of the physics of transition metal compounds, this book provides a comprehensive overview of this unique and diverse class of solids. Beginning with the basic concepts of the physics of strongly correlated electron systems, the structure of transition metal ions, and the behaviours of transition metal ions in crystals, it goes on to cover more advanced topics such as metal-insulator transitions, orbital ordering, and novel phenomena such as multiferroics, systems with oxygen holes, and high-Tc superconductivity. Each chapter concludes with a summary of key facts and concepts, presenting all the most important information in a consistent and concise manner. Set within a modern conceptual framework, and providing a complete treatment of the fundamental factors and mechanisms that determine the properties of transition metal compounds, this is an invaluable resource for graduate students, researchers and industrial practitioners in solid state physics and chemistry, materials science, and inorganic chemistry.
Electronic Structure and Properties of Transition Metal Compounds
Author: Isaac B. BersukerPublisher: John Wiley & Sons
ISBN: 0470920858
Category : Science
Languages : en
Pages : 658
Book Description
With more than 40% new and revised materials, this second edition offers researchers and students in the field a comprehensive understanding of fundamental molecular properties amidst cutting-edge applications. Including ~70 Example-Boxes and summary notes, questions, exercises, problem sets, and illustrations in each chapter, this publication is also suitable for use as a textbook for advanced undergraduate and graduate students. Novel material is introduced in description of multi-orbital chemical bonding, spectroscopic and magnetic properties, methods of electronic structure calculation, and quantum-classical modeling for organometallic and metallobiochemical systems. This is an excellent reference for chemists, researchers and teachers, and advanced undergraduate and graduate students in inorganic, coordination, and organometallic chemistry.
Transition Metal Oxides
Author: P.A. CoxPublisher: Oxford University Press
ISBN: 0199588945
Category : Science
Languages : en
Pages : 295
Book Description
Transition metal oxides form a series of compounds with a uniquely wide range of electronic properties. The main aim of this book is to describe the varied electronic behaviour shown by transition metal oxides, and to discuss the different types of theoretical models that have been proposed to interpret this behaviour.
Electronic and Vibronic Spectra of Transition Metal Complexes II
Author: Hartmut YersinPublisher: Springer
ISBN: 9783662147887
Category : Science
Languages : en
Pages : 262
Book Description
The unique properties and applications of transition metal compounds have long fascinated both physicists and chemists. This volume presents theoretical and experimental studies for a deeper understanding of the electronic and vibronic properties of these compounds. In particular, an introduction into properties of spin sublevels of dd*, dÂ*, and ÂÂ* states is given, and a modern ligand field theory based on the Angular Overlap Model is presented. In experimental case studies it is shown how to characterize different types of electronic transitions using modern methods of laser spectroscopy. Consequences of spin-orbit coupling, zero-field splittings, spin-lattice relaxations, chromophore-matrix interactions, Herzberg-Teller/Franck-Condon activities, and localization/delocalization properties are treated.