Download or read book Resonance Raman Spectroscopic Studies of Some Diazines written by Amanalah Aminzadeh and published by . This book was released on 1976 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports an investigation of the intensity behaviour in the preresonance Raman spectra of some normal modes of vibration of a series of diazine molecules (together with naphthalene). The main object of the study was to investigate the relation of Raman intensity in the preresonance region to the position and symmetry of the electronic states of the scattering molecule. The intensity behaviour of the Raman bands as a function of excitation wavenumber has been interpreted on the basis of the Albrecht-Hutley theory. The observations give information about the electronic states involved in the Raman scattering. The table shown gives a list of the bands investigated for the various molecules and summarises the wavenumbers and symmetries of the electronic states responsible for the Raman intensity of the corresponding Raman bands.....

Download or read book Resonance Roman Spectroscopic Studies of Some Diazines written by A. Aminzadeh and published by . This book was released on 1976 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resonance Raman spectroscopic studies of certain macrocyclic molecules written by Clara Kam-Fun Ho and published by . This book was released on 1980 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resonance Raman Studies of Some Organic Compounds written by Sahel Mohammed Al-Nakkash and published by . This book was released on 1979 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: RAMAN SPECTROSCOPY, PYRIMIDINES, FURANES, THYMINE, ADENINE, ADENOSINE, HETEROCYCLIC COMPOUNDS.

Download or read book Biochemical Applications of Raman and Resonance Raman Spectroscopes written by P Carey and published by Elsevier. This book was released on 2012-12-02 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochemical Applications of Raman and Resonance Raman Spectroscopies focuses on the application of Raman and resonance Raman spectroscopies to biochemical problems. The book reviews biological systems and details the application of Raman spectroscopy to biological molecules such as proteins, nucleic acids, and lipids. It also looks at codevelopments of lasers, optics, and electronics that drive advances in experimental Raman spectroscopy, along with the important ramifications of these advances for biochemical applications. This volume is organized into eight chapters and begins with an overview of the theoretical and experimental aspects of Raman spectroscopy, including a very brief explanation of what Raman and resonance Raman spectroscopies are and a discussion of their advantages and disadvantages for biochemical studies. The explanation of the Raman and resonance Raman effects is taken up in more detail in the next chapter, which develops the concept of the vibrational motions of molecules by initially considering mechanical ""ball and spring"" models and goes on to use this concept to formulate a classical model for Raman scattering. The resonance Raman effect is then described by another model which emphasizes the discrete or quantized energy levels available to a molecule. The reader is also introduced to the experimental aspects of Raman spectroscopy and the application of Raman spectroscopy across the entire field of biochemistry. Each chapter contains an outline of the basic chemistry and biochemical nomenclature involved. This book will be of interest to chemists, biochemists, and spectroscopists, as well as graduate students and experienced research workers.

Download or read book A Raman Spectroscopic Investigation of Some Heteropolymolybdates written by Melody Starr Kasprzak and published by . This book was released on 1978 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resonance raman and infrared spectroscopic studies of probe molecules interacting with surface sites on oxides written by Louise D. MacGregor and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Structure of 8 Methoxypsoralen written by Natalya A. Shcherbinina and published by . This book was released on 2000 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resonance Raman and Time Resolved Spectroscopic Studies of Selected Chlorobenzophenone and Fluoroquinolones written by Wen Li and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Resonance Raman and Time-resolved Spectroscopic Studies of Selected Chlorobenzophenone and Fluoroquinolones" by Wen, Li, 李闻, 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: Nanosecond time-resolved resonance Raman (ns-TR3) spectroscopy was used in this thesis to study the photoreduction reactions and the photochemistry of chloro-substituted benzophenone (ClBP) triplets. The 3-chlorobenzophenone (3-ClBP), 4-chlorobenzophenone (4-ClBP) and 4,4′-dichlorobenzophenone (4,4′-diClBP) triplets exhibit similar properties to the parent BP triplet. In isopropyl alcohol (IPA), the hydrogen abstraction reactions were observed for the 3-ClBP, 4-ClBP and 4,4′-diDlBP triplets. The diphenylketyl (DPK) radicals produced from the hydrogen abstraction reactions were observed and the recombination of the DPK and dimethylketyl radicals at the para-position was observed to form a light absorption transient (LAT) species. In MeCN: H2O/1:1 aqueous solutions, these DPK radicals were also observed but with a slower formation rate and the LAT species was produced by reaction with OH radicals. Density functional theory (DFT) calculations were employed to help identify the intermediates seen in the TR3 spectra and to help provide information about the vibrational motions of the molecules examined. The 2-Cl-DPK radical was also observed in the TR3 spectra obtained in an IPA solvent. However, the yield of the 2-Cl-DPK radical and the hydrogen abstraction rate was observed to be significantly lower than that of the other ClBP examined here under the same experimental conditions. The results DFT calculations show that the 2-chloro substituent changes the geometry and the electron density of the molecular orbitals of the BP triplet so that the 2-chloro substituent reduces the hydrogen abstraction ability the triplet state, which is different the hypothesis put forward by some previous studies that an electron-withdrawing group should increase the photoreduction ability of BP derivatives. Norfloxacin (NF) and Enoxacin (EN) are representative derivatives of Fluoroquinolones (FQ). There are four forms of NF and EN and these different forms can coexist in aqueous solutions. The UV-vis absorption and resonance Raman (RR) spectra of NF and EN have been obtained in neat acetonitrile (MeCN), MeCN: HClO4-H2O/1:1 (pH?1), MeCN: H2O/1:1 (pH?7.5) and MeCN: NaOH-H2O/1:1 (pH?13) solutions. The species observed in the spectra are assigned by comparison of the experimental spectra to the DFT calculated spectra and the vibrational modes are also described from the results of the DFT calculations. The absorption spectra of NF and EN obtained in MeCN: H2O/1:1 solutions show that some other species coexist with the tautomeric forms in the neutral aqueous solution. The RR spectra of the tautomeric forms of NF and EN were obtained by subtraction of the RR spectra of the neutral and anionic forms from the RR spectra of NF and EN in neutral aqueous solutions. The results suggest that NF and EN exists in neutral, anionic and tautomeric forms in neutral aqueous solutions. The time dependant DFT calculation results suggest that the fluorine atom has little contribution to the lowest unoccupied molecular orbitals of the different forms of NF and EN. DOI: 10.5353/th_b4807974 Subjects: Benzoates Organic compounds - Spectra Photochemistry Rama

Download or read book Aleksandr Vasil evi Volkov 1903 1971 written by and published by . This book was released on 1971* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Infrared and Raman Spectra of Inorganic and Coordination Compounds Part A written by Kazuo Nakamoto and published by John Wiley & Sons. This book was released on 2008-12-22 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sixth Edition of this classic work comprises the most comprehensive and current guide to infrared and Raman spectra of inorganic, organometallic, bioinorganic, and coordination compounds. From fundamental theories of vibrational spectroscopy to applications in a variety of compound types, this has been extensively updated. New topics include the theoretical calculations of vibrational frequencies (DFT method), chemical synthesis by matrix co-condensation reactions, time-resolved Raman spectroscopy, and more. This volume is a core reference for chemists and medical professionals working with infrared or Raman spectroscopies and an excellent textbook for graduate courses.

Download or read book Raman Spectroscopy of Two Dimensional Materials written by Ping-Heng Tan and published by Springer. This book was released on 2018-12-30 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows the electronic, optical and lattice-vibration properties of the two-dimensional materials which are revealed by the Raman spectroscopy. It consists of eleven chapters covering various Raman spectroscopy techniques (ultralow-frequency, resonant Raman spectroscopy, Raman imaging), different kinds of two-dimensional materials (in-plane isotropy and anisotropy materials, van der Waals heterostructures) and their physical properties (double-resonant theory, surface and interface effect). The topics include the theory origin, experimental phenomenon and advanced techniques in this area. This book is interesting and useful to a wide readership in various fields of condensed matter physics, materials science and engineering.

Download or read book Resonance Raman Studies of Selected Di Tri And Tetra isocyano Rhenium i Diimine Complexes written by Shun-Cheung Cheng and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Resonance Raman Studies of Selected DI-, TRI- and Tetra(isocyano) Rhenium(i) Diimine Complexes" by Shun-cheung, Cheng, 鄭信祥, 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 titled RESONANCE RAMAN STUDIES OF SELECTED DI-, TRI- AND TETRA(ISOCYANO) RHENIUM(I) DIIMINE COMPLEXES submitted by Shun Cheung CHENG for the Degree of Doctor of Philosophy at The University of Hong Kong in May 2014 The ground state and excited state properties of 1,10-phenanthroline and various di(isocyano) t i i (R= Bu, 2,6- Pr C H ), tri(isocyano) (R=4-ClC H, 4-ClC H, 2,6- Pr C H ) and tetra(isocyano) 2 6 3 6 4 6 4 2 6 3 (R=2,6- Pr C H, 4-Br-2,6-MeC H, 4-IC H ) rhenium(I) diimine complexes have been studied 2 6 3 6 4 6 4 by resonance Raman spectroscopy. The absolute Raman cross-sections of major bands of the complexes in acetonitrile solution under various excitation wavelengths were reported and the resonance Raman excitation profiles of different modes of the complexes showed large variations with different excitation wavelengths. The vibrational frequencies of the complexes were assigned by the Density Functional Theory (DFT) calculations and the experimental and calculated frequencies were shown to be in good match. Differences of the ground state structures among the complexes were highlighted, particularly on the presence of various low- energy conformers of the 4-halophenyl isocyano complexes. Also, open-shell DFT calculations were employed to the optimization of the first triplet state of the complexes. The emission energies of the complexes were close to the triplet-singlet gaps calculated by DFT method, and there are substantial structural changes between the optimized ground and triplet states of the complexes. The absorption wavelengths and intensities of several complexes in acetonitrile were consistent to the time-dependent density functional theory (TDDFT) calculations. Besides, a combined DFT and TD-DFT method is utilized to predict the resonance Raman intensities of 1,10-phenanthroline and di(isocyano) complexes using short-time approximation, and it compares well with the experimental results of the three compounds under several excitation wavelengths. DOI: 10.5353/th_b5351016 Subjects: Complex compounds - Spectra Organorhenium compounds - Spectra Raman spectroscopy

Download or read book Infrared and Raman Spectra of Inorganic and Coordination Compounds Part B written by Kazuo Nakamoto and published by John Wiley & Sons. This book was released on 2009-01-16 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 6th edition of this classic comprises the most comprehensive guide to infrared and Raman spectra of inorganic, organometallic, bioinorganic, and coordination compounds. From fundamental theories of vibrational spectroscopy to applications in a variety of compound types, it is extensively updated. Part B details applications of Raman and IR spectroscopy to larger and complex systems. It covers interactions of cisplatin and other metallodrugs with DNA and cytochrome c oxidase and peroxidase. This is a great reference for chemists and medical professionals working with infrared or Raman spectroscopies and for graduate students.

Download or read book Resonance Raman spectroscopic studies of macrocyclic complexes carotenoid pigments and exciplexes written by Ming-Hsing Huang and published by . This book was released on 1985 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resonance Raman Studies of Transition Metal Complexes Containing Activated Oxygen Species written by Elizabeth Conrad Wilkinson and published by . This book was released on 1998 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Infrared and Raman Spectra of Inorganic Compounds and Organic Salts written by Richard A. Nyquist and published by Academic Press. This book was released on 1996-08-30 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Infrared and Raman Spectra of Inorganic Compounds and Organic Salts