High-Resolution Spectroscopy of Transient Molecules
Title | High-Resolution Spectroscopy of Transient Molecules PDF eBook |
Author | Eizi Hirota |
Publisher | Springer |
Pages | 236 |
Release | 1985-05-01 |
Genre | Science |
ISBN | 9783540153023 |
It is a great challenge in chemistry to clarify every detail of reaction processes. In older days chemists mixed starting materials in a flask and took the resul tants out of it after a while, leaving all the intermediate steps uncleared as a sort of black box. One had to be content with only changing temperature and pressure to accelerate or decelerate chemical reactions, and there was almost no hope of initiating new reactions. However, a number of new techniques and new methods have been introduced and have provided us with a clue to the examination of the black box of chemical reaction. Flash photolysis, which was invented in the 1950s, is such an example; this method has been combined with high-resolution electronic spectroscopy with photographic recording of the spectra to provide a large amount of precise and detailed data on transient molecules which occur as intermediates during the course of chemical reac tions. In 1960 a fundamentally new light source was devised, i. e. , the laser. When the present author and coworkers started high-resolution spectroscopic stud ies of transient molecules at a new research institute, the Institute for Molecu lar Science in Okazaki in 1975, the time was right to exploit this new light source and its microwave precursor in order to shed light on the black box.
High-Resolution Spectroscopy of Transient Molecules
Title | High-Resolution Spectroscopy of Transient Molecules PDF eBook |
Author | Eizi Hirota |
Publisher | Springer Science & Business Media |
Pages | 245 |
Release | 2012-12-06 |
Genre | Science |
ISBN | 3642824773 |
It is a great challenge in chemistry to clarify every detail of reaction processes. In older days chemists mixed starting materials in a flask and took the resul tants out of it after a while, leaving all the intermediate steps uncleared as a sort of black box. One had to be content with only changing temperature and pressure to accelerate or decelerate chemical reactions, and there was almost no hope of initiating new reactions. However, a number of new techniques and new methods have been introduced and have provided us with a clue to the examination of the black box of chemical reaction. Flash photolysis, which was invented in the 1950s, is such an example; this method has been combined with high-resolution electronic spectroscopy with photographic recording of the spectra to provide a large amount of precise and detailed data on transient molecules which occur as intermediates during the course of chemical reac tions. In 1960 a fundamentally new light source was devised, i. e. , the laser. When the present author and coworkers started high-resolution spectroscopic stud ies of transient molecules at a new research institute, the Institute for Molecu lar Science in Okazaki in 1975, the time was right to exploit this new light source and its microwave precursor in order to shed light on the black box.
High-Resolution Spectroscopy of Transient Molecules
Title | High-Resolution Spectroscopy of Transient Molecules PDF eBook |
Author | Eizi Hirota |
Publisher | |
Pages | 252 |
Release | 1985-05-01 |
Genre | |
ISBN | 9783642824784 |
High-resolution Spectroscopy of Some Transient Molecules
Title | High-resolution Spectroscopy of Some Transient Molecules PDF eBook |
Author | Duck-Lae Joo |
Publisher | |
Pages | 678 |
Release | 1994 |
Genre | |
ISBN |
Moderate and High Resolution Spectroscopy of Transient Molecular Ions
Title | Moderate and High Resolution Spectroscopy of Transient Molecular Ions PDF eBook |
Author | Sergey I. Panov |
Publisher | |
Pages | 292 |
Release | 1997 |
Genre | |
ISBN |
High Resolution Spectroscopy of Transient Metal-containing Diatomic Molecules
Title | High Resolution Spectroscopy of Transient Metal-containing Diatomic Molecules PDF eBook |
Author | Jamie Jerome Gengler |
Publisher | |
Pages | 329 |
Release | 2007 |
Genre | Diatomic molecules |
ISBN | 9781109960365 |
The near-infrared and visible band systems of the diatomic molecules CaH, FeO, ScS, MnH, RhO, and RhN have been studied utilizing high resolution spectroscopy. Most of these metal-containing species are free radicals and as such provide edifying spectra from which information regarding electronic structure can be gleaned. Directly accessible phenomena modeled by effective Hamiltonian methods are molecular rotation, spin-orbit, spin-spin, spin-rotation, lambda-doubling, magnetic hyperfine interactions, and electric quadrupole interactions. In the case of CaH a deperturbation analysis was performed and in the case of RhN isotopic substitution was analyzed. For CaH, FeO, RhO, and RhN, the application of an external static electric field i.e. Stark effect) allowed determination of permanent electric dipole moments of the ground and excited states probed. For CaH and MnH, the application of an external static magnetic field (i.e. Zeeman effect) allowed determination of effective g-factors. Parameters obtained from the data indirectly allow a description of the molecular orbitals involved, and were also compared to ab initio calculations. Due to the transient nature of these gas phase molecules, production was accomplished via laser ablation of a metal sample and introduction of an appropriate reagent gas. Subsequent supersonic expansion and molecular beam formation then allowed probing of the molecules by Laser Induced Fluorescence (LIF). High-resolution spectra were facilitated by a Continuous-Wave (CW) ring laser. Complementary to this, low or medium resolution spectra were obtained with a pulsed-dye laser (controlled via a homemade Visual Basic 6.0 computer program). Several previously unobserved band systems have been detected as part of a project involving survey scans of Rh metal plus various gas reagents including CH4, SF6, NH3, and D2.
High-resolution Infrared Spectroscopy of Transient Molecules - Development of Broadband Optical Parametric Oscillators
Title | High-resolution Infrared Spectroscopy of Transient Molecules - Development of Broadband Optical Parametric Oscillators PDF eBook |
Author | Jürgen Krieg |
Publisher | |
Pages | 129 |
Release | 2012 |
Genre | |
ISBN | 9783954040124 |