Vibrational Dynamics in Complex Systems Investigated with Non-linear Ultrafast Infrared Techniques PDF Download
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Author: Christopher Jon Stromberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 404
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Book Description
Author: Christopher Jon Stromberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 404
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Book Description
Author: Michael D. Fayer
Publisher: CRC Press
ISBN: 1466510137
Category : Science
Languages : en
Pages : 491
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Book Description
The advent of laser-based sources of ultrafast infrared pulses has extended the study of very fast molecular dynamics to the observation of processes manifested through their effects on the vibrations of molecules. In addition, non-linear infrared spectroscopic techniques make it possible to examine intra- and intermolecular interactions and how such interactions evolve on very fast time scales, but also in some instances on very slow time scales. Ultrafast Infrared Vibrational Spectroscopy is an advanced overview of the field of ultrafast infrared vibrational spectroscopy based on the scientific research of the leading figures in the field. The book discusses experimental and theoretical topics reflecting the latest accomplishments and understanding of ultrafast infrared vibrational spectroscopy. Each chapter provides background, details of methods, and explication of a topic of current research interest. Experimental and theoretical studies cover topics as diverse as the dynamics of water and the dynamics and structure of biological molecules. Methods covered include vibrational echo chemical exchange spectroscopy, IR-Raman spectroscopy, time resolved sum frequency generation, and 2D IR spectroscopy. Edited by a recognized leader in the field and with contributions from top researchers, including experimentalists and theoreticians, this book presents the latest research methods and results. It will serve as an excellent resource for those new to the field, experts in the field, and individuals who want to gain an understanding of particular methods and research topics.
Author: Oleg Selig
Publisher:
ISBN:
Category :
Languages : en
Pages : 190
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Book Description
In this work we use polarization-resolved pump-probe and two-dimensional infrared (2DIR) spectroscopy to study the conformational changes and the vibrational population dynamics in complex molecular systems. In the first part of this thesis we investigate elastin-like polypeptides, which are a new class of biocompatible molecules known for their promising application in drug delivery, tissue engineering and recombinant protein purification. When heated above their lower critical solution temperature, these peptides undergo a sharp, reversible transition to an insoluble phase. We study the molecular origin of this transition by using 2DIR spectroscopy to probe the amide I’ vibration, which is sensitive to the conformation and the solvation state of the peptide backbone. In the second part we demonstrate how the sensitivity of nonlinear vibrational spectroscopy can be increased by more than 4 orders of magnitude by exploiting the nearfield of infrared gold nanoantennas. In addition to performing a proof of principle experiment, we also develop an intuitive and didactic model which explains the observed linear and nonlinear infrared signals. In the last part we study methylammonium lead halide perovskites, which are a new class of solution-processable, cheap, high-efficiency solar-cell materials. Many of the remarkable optoelectronic properties of these materials are attributed to the fast reorientational dynamics of the methylammonium cation. We use a combination of 2DIR spectroscopy and molecular dynamics simulations to characterize the timescale and nature of these ultrafast motions.
Author: Guglielmo Lanzani
Publisher: CRC Press
ISBN: 1420017519
Category : Science
Languages : en
Pages : 286
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Book Description
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
Author: Paul Corkum
Publisher: Springer Science & Business Media
ISBN: 3540687815
Category : Science
Languages : en
Pages : 853
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Book Description
This book summarizes the results presented at the 15th International Conference on Ultrafast Phenomena and provides an up-to-date view of this important field. It presents the latest advances in ultrafast science, including both ultrafast optical technology and the study of ultrafast phenomena. It covers picosecond, femtosecond, and attosecond processes relevant to applications in physics, chemistry, biology, and engineering.
Author: Michael D. Fayer
Publisher: World Scientific
ISBN: 9814355623
Category : Science
Languages : en
Pages : 383
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Book Description
This unique volume presents a comprehensive but accessible introduction to the field of ultrafast two-dimension infrared (2D IR) vibrational echo spectroscopy based on the pioneering work of Professor Michael D Fayer, Department of Chemistry, Stanford University, USA. It contains in one place a qualitative introduction to the field of 2D IR spectroscopy and a comprehensive set of scientific papers that underlie the qualitative discussion. The introductory material contains several detailed illustrations, and is based on the Centenary Lecture at the Indian Institute of Science given by Professor Fayer July 16, 2008 as part of the celebration of the 100th anniversary of the founding of IIS in Bangalore, India. The second part of the volume contains reprints of Fayer's relevant papers. The compilation will be very useful because it presents the historical background, motivation, methodology, and experimental results at a level that is accessible to the non-expert. The reprints of the scientific papers, from review articles to detailed theoretical papers, provide rigorous supporting material so that the reader can delve as deeply as desired into the subject.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 800
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Book Description
Author: M.D. Fayer
Publisher: CRC Press
ISBN: 9780203904763
Category : Science
Languages : en
Pages : 736
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Book Description
A description of procedures for probing bond activation, H-bonded systems, molecular dynamical mechanisms, vibrational dephasing, simple liquids, and proteins and energy flow effects using ultrafast vibrational spectroscopy experiments. It discusses experimental and theoretical methods of ultrafast infrared and Raman measurements.
Author: American Chemical Society. Committee on Professional Training
Publisher:
ISBN:
Category : Biochemistry
Languages : en
Pages : 1932
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Book Description
Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Author: Anthony Reynolds
Publisher:
ISBN:
Category :
Languages : en
Pages : 123
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Book Description
Proton-coupled electron transfer model systems (PCET) are examined using polarization selective femtosecond infrared pump-probe spectroscopy to determine how the structural modes are coupled to the OH/OD stretching vibrational mode by monitoring low frequency oscillations in the OH/OD vibrational mode using pump-probe techniques. For all of the systems discussed in this dissertation, low frequency modes are anharmonically coupled to the OH/OD stretching vibration. The OH/OD stretching vibration discussed in this dissertation have complex and broad lineshapes in the infrared region (IR) that are difficult to decipher. A broadband IR (BBIR) source, when used as part of a third order nonlinear infrared pump-probe spectroscopy, gains access into the electronic ground state potential energy surface. This information reveals the molecular dynamics that give rise to the complex structure in an IR spectra. The BBIR used for these experiments is generated by focusing 800 nm/400 nm pulses into compressed air and is tunable from 2 - 5 microns with a FWHM greater than 1200 wavenumbers. The BBIR is a crucial mid-IR source in subsequent chapters for examining the broad lineshapes of the OH/OD stretching mode, which often exceeds 200 wavenumbers. The coupling of low frequency structural modulations to hydrogen bonding dynamics in PCET systems is explored by using the OH/OD stretching vibration in CCl4 or CHCl3. Third order nonlinear ultrafast infrared pump-probe spectroscopy is used to gather information on the high frequency OH/OD stretching vibrational modes in the ground state such as vibrational relaxation time and anharmonic vibrational coupling to low frequency structural modulations. At least one anharmonically coupled low frequency mode between 120 and 250 wavenumbers has been observed in all systems. To better understand and visualize how the low frequency mode may contribute to the PCET chemistry, we calculated the fundamental frequencies and third order coupling constants using Gaussian09. These calculations show a low frequency modulation along the reaction coordinate at a similar frequency. This information will allow us to unravel how hydrogen bonding dynamics are involved in the PCET process.
