Download or read book Femtosecond Stimulated Raman Studies of Vibrational Coupling and Ultrafast Chemical Reaction Dynamics written by Renee R. Frontiera and published by . This book was released on 2009 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Real time Structural Observation of Ultrafast Chemical Reaction Dynamics with Femtosecond Stimulated Raman written by Philipp Kukura and published by . This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The femtosecond time-resolution of FSRS is established by measuring the vibrational spectra of short-lived (
Download or read book Femtosecond Stimulated Raman Spectroscopy of Ultrafast Biophysical Reaction Dynamics written by David William McCamant and published by . This book was released on 2004 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Femtochemistry and Femtobiology written by Monique M. Martin and published by Elsevier. This book was released on 2004-04-16 with total page 589 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reflects the heights of knowledge of ultrafast chemical processes attained in these early years of the 21st century : the latest research in femtosecond and picosecond molecular processes in Chemistry and Biology, carried out around the world, is described here in more than 110 articles. The results were presented and discussed at the VIth International Conference on Femtochemistry, in Paris, France, from July 6 to July 10, 2003. The articles published here were reviewed by referees selected from specialists in the Femtochemistry community, guaranteeing a collective responsability for the quality of the research reported in the next 564 pages. Femtochemistry is an ever-growing field, where new research areas are constantly opening up, and one which both stimulates and accompanies the development of ultrafast technologies. The increasing interest in femtobiology and chemistry at the frontier with biology is an obvious indicator of the present impact of life sciences in our society. New materials and reactions at surfaces are also some of the relatively new topics that promise rapid developments. New methodologies and technologies for probing and following in real time molecular dynamical phenomena have appeared within the last ten years or so. These methods, based on multidimensional IR spectroscopies, ultrafast X-ray and electron diffraction techniques, are well represented in this book. Of ever-improving performance, they are now applied to the characterization of structural dynamics of an increasing number of chemical and biological systems.This book reports the state of research in Femtochemistry and Femtobiology presented at Paris, at the Maison de la Chimie, in July 2003, representing the tenth anniversary of the conference. * Overview of the most recent research on ultrafast events* Application of new methodologies on chemical and biological systems* Contributions by key players in the field
Download or read book Molecular Dynamics and Spectroscopy by Stimulated Emission Pumping written by Hai-Lung Dai and published by World Scientific. This book was released on 1995 with total page 1154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first stimulated emission pumping (SEP) experiments more than a decade ago, this technique has proven powerful for studying vibrationally excited molecules. SEP is now widely used by increasing numbers of research groups to investigate fundamental problems in spectroscopy, intramolecular dynamics, intermolecular interactions, and even reactions. SEP provides rotationally pre-selected spectra of vibrationally highly excited molecules undergoing large amplitude motions. A unique feature of SEP is the ability to access systematically a wide variety of extreme excitations localized in various parts of a molecule, and to prepare populations in specific, high vibrational levels. SEP has made it possible to ask and answer specific questions about intramolecular vibrational redistribution and the role of vibrational excitation in chemical reactions.
Download or read book Coherent Vibrational Dynamics written by Guglielmo Lanzani and published by CRC Press. This book was released on 2007-11-29 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remarkable developments in the spectroscopy field regarding ultrashort pulse generation have led to the possibility of producing light pulses ranging from 50 to5 fs and frequency tunable from the near infrared to the ultraviolet range. Such pulses enable us to follow the coupling of vibrational motion to the electronic transitions in molecules and
Download or read book Stimulated Raman Scattering Microscopy written by Ji-Xin Cheng and published by Elsevier. This book was released on 2021-12-04 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Raman Scattering Microscopy: Techniques and Applications describes innovations in instrumentation, data science, chemical probe development, and various applications enabled by a state-of-the-art stimulated Raman scattering (SRS) microscope. Beginning by introducing the history of SRS, this book is composed of seven parts in depth including instrumentation strategies that have pushed the physical limits of SRS microscopy, vibrational probes (which increased the SRS imaging functionality), data science methods, and recent efforts in miniaturization. This rapidly growing field needs a comprehensive resource that brings together the current knowledge on the topic, and this book does just that. Researchers who need to know the requirements for all aspects of the instrumentation as well as the requirements of different imaging applications (such as different types of biological tissue) will benefit enormously from the examples of successful demonstrations of SRS imaging in the book. Led by Editor-in-Chief Ji-Xin Cheng, a pioneer in coherent Raman scattering microscopy, the editorial team has brought together various experts on each aspect of SRS imaging from around the world to provide an authoritative guide to this increasingly important imaging technique. This book is a comprehensive reference for researchers, faculty, postdoctoral researchers, and engineers. Includes every aspect from theoretic reviews of SRS spectroscopy to innovations in instrumentation and current applications of SRS microscopy Provides copious visual elements that illustrate key information, such as SRS images of various biological samples and instrument diagrams and schematics Edited by leading experts of SRS microscopy, with each chapter written by experts in their given topics
Download or read book New Methods in Two dimensional Femtosecond Stimulated Raman Spectroscopy written by Barbara Dunlap and published by . This book was released on 2015 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Understanding anharmonic vibrational coupling in molecules is important for understanding heat dissipation on the microscopic scale. In Raman spectroscopy, anharmonic coupling can be measured by fifth-order interaction, but this signal is overwhelmed by two third-order interactions, or cascades. This thesis describes two attempts at attenuating the cascade signal in two-dimensional femtosecond stimulated Raman spectroscopy (2D-FSRS). Theoretically, changing phase-matching conditions and sample concentration were predicted to attenuate the third-order cascade and to thereby allow observation of the fifth-order signal. Experimentally, both methods were found to decrease the cascade, however no fifth-order signal was apparent. The next method to measure anharmonic coupling was termed seventh-order Raman. In this implementation, seventh-order Raman uses a method called chirped-pulse stimulated Raman spectroscopy (CP-SRS) to create excited population in a low-frequency vibrational mode. When the low-frequency mode is excited, high frequency modes will shift frequencies according to their anharmonic coupling to the excited mode. CP-SRS is a new technique that is characterized and modeled in this thesis. This method uses two duplicates of a chirped, broadband laser pulse. When the pulses are delayed relative to each other, a narrow bandwidth instantaneous frequency difference is created that can excite Raman active vibrations in the sample via a stimulated Raman process. Currently, CP-SRS only excites approximately 0.05% of the molecules in the sample and the shift in the high frequency modes is too small to measure. With the growth in available stimulated Raman methods, it is important to compare the various benefits associated with each. This thesis provides a comparison of three different methods to obtain a stimulated Raman spectrum; FSRS, CP-SRS and broad-band impulsive vibrational spectroscopy (BB-IVS). These three methods are all two-pulse experiments, but have different combinations of femtosecond and picosecond pulses and use either the time or frequency domain for probing. The advantages and disadvantages of the three methods are discussed in the comparison"--Pages iii-iv.
Download or read book An Attempt at Direct Observation of Anharmonic Vibrational Coupling Constants with Two dimensional Femtosecond Stimulated Raman Spectroscopy written by Kristina C. Wilson and published by . This book was released on 2014 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Understanding heat dissipation on the microscopic level, Intermolecular Vibrational Energy Redistribution (IVR), is a fundamental and inscrutable problem in chemical physics. Since the late 1990's, multidimensional Raman spectroscopic techniques have been developed in hopes of directly measuring anharmonic vibrational coupling constants, the physical quantities that facilitate such heat flow. In this work, we describe the development and application of Two-Dimensional Femtosecond Stimulated Raman Spectroscopy (2D-FSRS) to this long-standing problem. In 2D-FSRS, coherent oscillations are induced in low frequency vibrational modes of a molecule with Impulsive Stimulated Raman Spectroscopy (ISRS); frequency modulation of potentially coupled high-frequency modes is observed over time with Femtosecond Stimulated Raman Spectroscopy (FSRS). 2D-FSRS spectra of acetonitrile were found to be dominated by cascade signals that obscure the small-magnitude frequency modulated signals. Classical Coupled Wave theory and Coherent Anti-Stokes Raman Spectroscopy confirmed this obfuscation. Five- and seven-dimensional Raman spectroscopies by others successfully attenuated these pernicious signals by manipulating phase matching conditions. This approach was also applied to 2D-FSRS, but the geometrical inexibility imparted by the simple, three-beam experiment rendered this solution inadequate"--Page v.
Download or read book The Chemical Bond written by Ahmed Zewail and published by Elsevier. This book was released on 1992-05-14 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: This inspired book by some of the most influential scientists of our time--including six Nobel laureates--chronicles our emerging understanding of the chemical bond through the last nine decades and into the future. From Pauling's early structural work using x-ray and electron diffraction to Zewail's femtosecond lasers that probe molecular dynamics in real time; from Crick's molecular biology to Rich's molecular recognition, this book explores a rich tradition of scientific heritage and accomplishment. The perspectives given by Pauling, Perutz, Rich, Crick, Porter, Polanyi, Herschbach, Zewail, and Bernstein celebrate major scientific achievements in chemistry and biology with the chemical bond playing a fundamental role. In a unique presentation that also provides some lively insights into the very nature of scientific thought and discovery, The Chemical Bond: Structure and Dynamics will be of general interest to scientists, science historians, and the scientifically inclined populous.
Download or read book Excited State Molecular Structural Evolution and Chemical Reactivity Studied by Femtosecond Stimulated Raman Spectroscopy written by Fangyuan Han and published by . This book was released on 2014 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, my research work on excited state dynamics of small organic molecules in solutions is presented. Using femtosecond stimulated Raman spectroscopy (FSRS) as the main experimental tool, the excited state hydrogen-bonding dynamics (ESHBD) of Coumarin 102, a common laser dye molecule, in ethanol solution is examined with
Download or read book Femtochemistry Ultrafast Chemical And Physical Processes In Molecular Systems written by Majed Chergui and published by World Scientific. This book was released on 1996-04-30 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the latest experimental and theoretical developments in the field of femtochemistry, with papers describing the physics and chemistry of ultrafast processes in small molecules, complex molecular systems, clusters, biological systems, solids, matrices, liquids and at surfaces and interfaces. The recent developments in frequency-domain studies of femtodynamics are also presented. In addition, the latest achievements in femtosecond control of chemical reactions are presented, together with the newest techniques in real-time probing of reactions such as ultrafast x-ray or electron diffraction. The papers are rich in references giving a clearcut state-of-the-art of the topics being discussed. The book should be a valuable tool to all persons in the field and to young scientists.Contributors include: A H Zewail, J Jortner, V S Letokhov, J Manz, R S Berry, C Wittig, K B Eisenthal, A W Castleman Jr., J T Hynes, W H Gadzuk, R Kosloff, S Mukamel, K R Wilson; G Fleming, D Wiersma, K Yoshihara, V Sundström, A Apkarian, N Scherer, A Myers, R Schinke, J R Huber, R B Gerber, G Gerber and P M Champion.
Download or read book Inverse Raman Scattering in Femtosecond Broadband Transient Absorption Experiments written by Antonio Aloi and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter reports on one of the nonlinear spectral features, the inverse Raman scattering (IRS), observed upon the interaction of ultrafast-pulsed lasers in a Raman-active medium. Hereby, a comprehensive theoretical description of the IRS is exposed. Furthermore, the investigation carried out on synthetic eumelanin dispersions is addressed to show how the transient absorption measurements can be influenced by the IRS, if probing at energies close to Stokes and anti-Stokes vibrational modes of the medium. A thorough analysis demonstrates that the IRS affects the sign of dynamics but not relaxation times. A specific kind of spectroscopy based on the IRS effect (ultrafast Raman loss spectroscopy) is eventually illustrated as valuable tool to characterize the structure of molecules and to investigate their dynamics during chemical reactions, even occurring at ultrafast timescales.
Download or read book Light Harvesting in Photosynthesis written by Roberta Croce and published by CRC Press. This book was released on 2018-01-12 with total page 793 pages. Available in PDF, EPUB and Kindle. Book excerpt: This landmark collective work introduces the physical, chemical, and biological principles underlying photosynthesis: light absorption, excitation energy transfer, and charge separation. It begins with an introduction to properties of various pigments, and the pigment proteins in plant, algae, and bacterial systems. It addresses the underlying physics of light harvesting and key spectroscopic methods, including data analysis. It discusses assembly of the natural system, its energy transfer properties, and regulatory mechanisms. It also addresses light-harvesting in artificial systems and the impact of photosynthesis on our environment. The chapter authors are amongst the field’s world recognized experts. Chapters are divided into five main parts, the first focused on pigments, their properties and biosynthesis, and the second section looking at photosynthetic proteins, including light harvesting in higher plants, algae, cyanobacteria, and green bacteria. The third part turns to energy transfer and electron transport, discussing modeling approaches, quantum aspects, photoinduced electron transfer, and redox potential modulation, followed by a section on experimental spectroscopy in light harvesting research. The concluding final section includes chapters on artificial photosynthesis, with topics such as use of cyanobacteria and algae for sustainable energy production. Robert Croce is Head of the Biophysics Group and full professor in biophysics of photosynthesis/energy at Vrije Universiteit, Amsterdam. Rienk van Grondelle is full professor at Vrije Universiteit, Amsterdam. Herbert van Amerongen is full professor of biophysics in the Department of Agrotechnology and Food Sciences at Wageningen University, where he is also director of the MicroSpectroscopy Research Facility. Ivo van Stokkum is associate professor in the Department of Physics and Astronomy, Faculty of Sciences, at Vrije Universiteit, Amsterdam.
Download or read book Study of Structural Dynamics with Raman and Ultrafast X ray Spectroscopy written by Rhiannon Porter and published by . This book was released on 2008 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Complex Molecular Dynamics in the Gas Phase Using Femtosecond Four wave Mixing Spectroscopy written by Abraham Vamattathil Scaria and published by . This book was released on 2008 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafast spectroscopy is one of the most active areas of research in chemical physics. Understanding the ultrafast behavior of molecules, and influencing it with the help of laser fields may lead to the ultimate goal of controlling the flow and outcome of chemical reactions. This thesis work focuses on the investigation and control of molecular dynamics using time-resolved four-wave mixing (FWM) techniques in gas phase samples. Femtosecond FWM spectroscopy has established itself as a powerful tool to uncover molecular dynamics on ultrafast time scales. The femtosecond time resolution combined with a background-free, highly collimated coherent signal makes the approach unique for studying the dynamics especially under conditions of low concentrations. In gas phase, the elementary reaction paths can be directly probed without the interference of solvent molecules. A comparative study of the molecular dynamics in the gas phase and condensed phase gives a detailed picture on the effect of environment. Utilization of Raman as well as optical resonances in FWM spectroscopy provided high selectivity with respect to the type of molecular dynamics observed in the transient signal. New schemes of FWM spectroscopy, which employs an initial pump pulse along with a fully time resolved FWM process, were devised to monitor also the dynamics of higher lying excited states. A feed back controlled optimization process in a FWM scheme is used to selectively excite or suppress vibrational modes in gas phase and liquid phase of the same molecule. The results of the experiments performed using different FWM techniques to monitor, understand, and also to control diverse aspects of molecular dynamics in different systems are presented and discussed.
Download or read book Raman Spectroscopy and Applications written by Khan Maaz and published by BoD – Books on Demand. This book was released on 2017-02-15 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raman spectroscopy has a number of applications in various fields including material science, physics, chemistry, biology, geology, and medicine. This book illustrates necessary insight and guidance in the field of Raman spectroscopy with detailed figures and explanations. This presents deep understanding of new techniques from basic introduction to the advance level for scientists and engineers. The chapters cover all major aspects of Raman spectroscopy and its application in material characterization with special emphasis on both the theoretical and experimental aspects. This book is aimed to provide solid foundation of Raman spectroscopy to the students, scientists, and engineers working in various fields as mentioned above.
