Author: Karim H. HassanPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Absorption and Laser Induced Fluorescence Spectra of Some Aromatic Molecules
Author: Karim H. HassanHandbook of florescence spectra of Aromatic Molecules
Author: Isadore BerlmanPublisher: Elsevier
ISBN: 0323161677
Category : Science
Languages : en
Pages : 488
Book Description
Handbook of Fluorescence Spectra of Aromatic Molecules, Second Edition describes the fluorescence and absorption spectra of about 200 aromatic compounds, most of which fall into the following classes: p-oligophenylenes, indole derivatives, fluoranthene derivatives, napthalene derivatives, biphenyl derivatives, and biological stains. Experiments with lasers and their relevance to fluorescence studies are included. This handbook is comprised of seven chapters and begins with a historical overview of research into the fluorescence characteristics of compounds, the methods and equipment used to measure fluorescence, and elementary considerations concerning luminescence. The format for the presentation of data pertaining to each compound covered in this text is described, together with the equipment for exciting, detecting, and recording the spectrum of the emitted radiation. The discussion then turns to the free electron model and presents general information on concepts such as chromophores, planar and nonplanar molecules, effects of planarity on fluorescence, solvent and concentration effects, and polarization. The following chapters focus on compounds such as benzene and polycyclic hydrocarbons as well as some uses of fluorescent compounds. This monograph will be of interest to organic chemists and physicists.
Handbook of Fluorescence Spectra of Aromatic Molecules
Author: Isadore B. BerlmanPublisher:
ISBN:
Category : Science
Languages : en
Pages : 494
Book Description
Handbook of florescence spectra of Aromatic Molecules ...
Spectroscopy and Photophysics of Surface Adsorbed Molecules
Author: Nivaldo Jose TroLaser Induced Fluorescence Spectroscopy of Aromatic Systems
Author: Melinda WalkerSynchronous Detection of Laser-induced Fluorescence
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Many toxic or carcinogenic organic molecules have large absorption and fluorescence emission cross sections and can thus be detected by laser-induced fluorescence (LIF) in liquid samples at parts-per-billion levels or better. The technique of synchronous detection of laser-induced fluorescence (SDLIF) provides a way to distinguish between the fluorescence from a toxic molecule and the fluorescence from a background substance. This is done by synchronously scanning the laser excitation and fluorescence detection wavelengths at a fixed wavelength separation. What is measured in the overlap integral of the excitation and emission spectra that is considerably narrower than the entire fluorescence spectrum. The discussion of these techniques is centered on the point and remote detection of polynuclear aromatic hydrocarbons, aromatic amines, and organophosphates having applications in certain manufacturing processes as well as in coal liquefaction and gasification plants.
Principles of Fluorescence Spectroscopy
Author: Joseph R. LakowiczPublisher: Springer Science & Business Media
ISBN: 146157658X
Category : Science
Languages : en
Pages : 487
Book Description
Fluorescence methods are being used increasingly in biochemical, medical, and chemical research. This is because of the inherent sensitivity of this technique. and the favorable time scale of the phenomenon of fluorescence. 8 Fluorescence emission occurs about 10- sec (10 nsec) after light absorp tion. During this period of time a wide range of molecular processes can occur, and these can effect the spectral characteristics of the fluorescent compound. This combination of sensitivity and a favorable time scale allows fluorescence methods to be generally useful for studies of proteins and membranes and their interactions with other macromolecules. This book describes the fundamental aspects of fluorescence. and the biochemical applications of this methodology. Each chapter starts with the -theoreticalbasis of each phenomenon of fluorescence, followed by examples which illustrate the use of the phenomenon in the study of biochemical problems. The book contains numerous figures. It is felt that such graphical presentations contribute to pleasurable reading and increased understand ing. Separate chapters are devoted to fluorescence polarization, lifetimes, quenching, energy transfer, solvent effects, and excited state reactions. To enhance the usefulness of this work as a textbook, problems are included which illustrate the concepts described in each chapter. Furthermore, a separate chapter is devoted to the instrumentation used in fluorescence spectroscopy. This chapter will be especially valuable for those perform ing or contemplating fluorescence measurements. Such measurements are easily compromised by failure to consider a number of simple principles.
Laser Induced Fluorescence of Trapped Molecular Ions
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Laser induced fluoresence (LIF) spectra (laser excitation spectra) are conceptually among the most simple spectra to obtain. One need only confine a gaseous sample in a suitable container, direct a laser along one axis of the container, and monitor the sample's fluorescence at a right angle to the laser beam. As the laser wavelength is changed, the changes in fluorescence intensity map the absorption spectrum of the sample. (More precisely, only absorption to states which have a significant radiative decay component are monitored.) For ion spectroscopy, one could benefit in many ways by such an experiment. Most optical ion spectra have been observed by emission techniques, and, aside from the problems of spectral analysis, discharge emission methods often produce the spectra of many species, some of which may be unknown or uncertain. Implicit in the description of LIF given above is certainty as to the chemical identity of the carrier of the spectrum. This article describes a method by which the simplifying aspects of LIF can be extended to molecular ions (albeit with a considerable increase in experimental complexity over that necessary for stable neutral molecules).
Molecular Fluorescence
Author: Bernard ValeurPublisher: John Wiley & Sons
ISBN: 3527328467
Category : Science
Languages : en
Pages : 595
Book Description
This second edition of the well-established bestseller is completely updated and revised with approximately 30 % additional material, including two new chapters on applications, which has seen the most significant developments. The comprehensive overview written at an introductory level covers fundamental aspects, principles of instrumentation and practical applications, while providing many valuable tips. For photochemists and photophysicists, physical chemists, molecular physicists, biophysicists, biochemists and biologists, lecturers and students of chemistry, physics, and biology.
Analytical Laser Induced Fluorescence and Phosphorescence Spectrometry of Aromatic Hydrocarbon Derivatives Prepared in Vapor Deposited Parent Molecule Matrices
Author: Charles Finley PacePublisher:
ISBN:
Category : Fluorescence spectroscopy
Languages : en
Pages : 516
Book Description