Watching Ultrafast Molecular Motions With 2d Ir Chemical Exchange Spectroscopy

Author : Michael D. Fayer
Publisher : World Scientific
ISBN 13 : 9814355623
Total Pages : 383 pages
Book Rating : 4.29/5 ( download)

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Download or read book Watching Ultrafast Molecular Motions with 2D IR Chemical Exchange Spectroscopy written by Michael D. Fayer and published by World Scientific. This book was released on 2011 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Kyungwon Kwak
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.89/5 ( download)

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Download or read book Ultrafast Chemical Exchange and Spectral Diffusion of Solute-solvent Complexes Probed by 2D IR Spectroscopy written by Kyungwon Kwak and published by . This book was released on 2008 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Michael D. Fayer
Publisher : CRC Press
ISBN 13 : 1466510137
Total Pages : 491 pages
Book Rating : 4.35/5 ( download)

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Download or read book Ultrafast Infrared Vibrational Spectroscopy written by Michael D. Fayer and published by CRC Press. This book was released on 2013-03-04 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Junrong Zheng
Publisher :
ISBN 13 :
Total Pages : 428 pages
Book Rating : 4.19/5 ( download)

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Download or read book Ultrafast Chemical Exchange Spectroscopy written by Junrong Zheng and published by . This book was released on 2007 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Daniel Edward Rosenfeld
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.08/5 ( download)

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Download or read book Ultrafast Time-resolved Infrared Spectroscopy of Molecular Monolayers and Solute-solvent Complexes written by Daniel Edward Rosenfeld and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafast time-resolved infrared spectroscopy has been a powerful tool in resolving and studying ultrafast motions in bulk chemical and biological systems. The utility of ultrafast time-resolved infrared spectroscopy is illustrated through two studies of solute-solvent complexes. The same experimental methods used to study bulk systems are then extended to study surface systems through the development of both surface molecular probes and new spectroscopic techniques. Ultrafast polarization and wavelength selective IR pump-probe spectroscopy is used to measure the inertial and long time orientational dynamics of pi-hydrogen bonding complexes. The complexes studied are composed of phen-d-ol (phenol-OD) and various pi-base solvents with different electron donating or withdrawing substituents. The inertial motion is found to be insensitive to the strength of the hydrogen bond, but highly sensitive to the local solvent structure as reported on by inhomogeneous line broadening. The local solvent structure therefore acts as the controlling influence in determining the extent of inertial orientational relaxation, and thus the angular potential. Variation in the pi-hydrogen bond strength is of secondary importance. Hydrogen bonded complexes between phenol and phenylacetylene are studied using ultrafast two-dimensional infrared (2D IR) chemical exchange spectroscopy. Phenylacetylene has two possible pi-hydrogen bonding acceptor sites (phenyl or acetylene) that compete for hydrogen bond donors in solution at room temperature. The chemical exchange process occurs in ~5 ps, and is assigned to direct hydrogen bond migration along the phenylacetylene molecule. The observation of direct hydrogen bond migration can have implications for macromolecular systems. 2D IR vibrational echo spectroscopy and heterodyne detected transient grating (HDTG) spectroscopy (an ultra-sensitive analog of pump-probe spectroscopy) are developed as means of study of the structural and vibrational dynamics of surfaces. The surfaces studied are silica surfaces functionalized with a transition metal carbonyl complex, tricarbonyl (1,10)-phenanthroline rhenium chloride. The functionalization process produces chromophore surface density of 1-2 × 10^14 per cm squared. The high surface density achieved indicates that energy transfer between molecules on the surface could impact the experimental observables probed in 2D IR and HDTG spectroscopy. The theory of excitation transfer induced spectral diffusion has been developed and is capable of calculating the effect of the energy transfer on any spectroscopic observable through a master equation approach. Initial estimates of surface structural dynamics, based on both experimental 2D IR data and theoretical calculations, showed sub-100ps structural dynamics in the molecular monolayers even without the presence of solvent. Furthermore, solvent is shown to accelerate the structural dynamics in a manner that is different from that of bulk solution. Additional surface density dependent experiments indicate the negligible nature of excitation transfer even in these dense systems. The functionalized molecular monolayers are found to have a ~40 ps structural dynamics relaxation time in the absence of solvent. Further investigation of the effects of solvents on the RePhen(CO)3Cl monolayers has been carried out. Immersion in solvent is found to change the infrared spectrum, structural dynamics and vibrational dynamics in ways that differ from the changes evidenced in the bulk. The monolayers were immersed in both solvents that can dissolve RePhen(CO)3Cl and those that cannot. For both hexadecane and D2O, which cannot dissolve the headgroup, the structural dynamics of the monolayer are slowed by the presence of solvent while the vibrational dynamics are not impacted. Polar organic solvents, which can dissolve the headgroup, accelerate the dynamics. Dimethylformamide (DMF) is found to have a particularly strong effect on the structural dynamics of the monolayers, accelerating the timescale from 40 ps to 15 ps, yet DMF has little impact on the vibrational dynamics. Chloroform is found to enhance the vibrational lifetime of the CO symmetric stretch of the RePhen(CO)3Cl headgroups in the monolayer by 50%. These results indicate that the properties of thin films can be modified by the presence of solvent, even in the case when the solvent is repelled by the monolayer.

Author : Friedrich Kremer
Publisher : Springer
ISBN 13 : 3319727060
Total Pages : 409 pages
Book Rating : 4.66/5 ( download)

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Download or read book The Scaling of Relaxation Processes written by Friedrich Kremer and published by Springer. This book was released on 2018-07-20 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dielectric properties especially of glassy materials are nowadays explored at widely varying temperatures and pressures without any gap in the spectral range from μHz up to the Infrared, thus covering typically 20 decades or more. This extraordinary span enables to trace the scaling and the mutual interactions of relaxation processes in detail, e.g. the dynamic glass transition and secondary relaxations, but as well far infrared vibrations, like the Boson peak. Additionally the evolution of intra-molecular interactions in the course of the dynamic glass transition is also well explored by (Fourier Transform) Infrared Spectroscopy. This volume within 'Advances in Dielectrics' summarizes this knowledge and discusses it with respect to the existing and often competing theoretical concepts.

Author : Matthew Cody Zoerb
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.91/5 ( download)

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Download or read book Dynamic IR Peak Coalescence and Ultrafast Chemical Exchange Reactions Studied by Two Dimensional Infrared Spectroscopy written by Matthew Cody Zoerb and published by . This book was released on 2012 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibrational spectroscopy is one of the most powerful techniques in chemistry due to its ability to report direct information on the geometries and nuclear motions of complex molecules. At thermal equilibrium, rearrangements between different, or equivalent, molecular structures help to define the reactivity of the system. On the ultrafast timescale, these chemical exchange reactions may cause features in the vibrational spectrum to become averaged. The Bloch equations have been used previously to quantitatively predict the rates of such reactions. This approach has been quite successful in NMR spectroscopy where exchange on the microsecond timescale is often sufficient to cause peak coalescence. The application of the Bloch equations to IR spectroscopy has been debated due to the presence of other contributions to the vibrational lineshape that may prevent an accurate description of the relevant dynamics. Two dimensional infrared spectroscopy (2D-IR) is a time resolved ultrafast technique that is capable of directly measuring the kinetics of chemical exchange at thermal equilibrium where there is no net change in the populations of reactants and products. This work examines two model systems that display dynamic IR peak coalescence. A group of mixed valence dimers of trinuclear ruthenium clusters have exhibited a wide range of IR coalescence that is sensitive to solvent, temperature, and ligand substitution. No electron exchange was observed by 2D-IR during the timescale required for peak coalescence. The two isomers of a square pyramidal ruthenium dithiolene compound also result in highly coalesced spectra. The equilibrium populations, as well as the extent of peak coalescence, are strongly dependent on temperature and solvent. The experimental results of this second project were largely inconconclusive; however, future work with density functional theory calculations looks promising for revealing more information on these dynamics. Ultimately, the application of the Bloch equations to IR spectra is not generally reliable. While this type of analysis may still yield accurate results in some special cases, it is very difficult to distinguish legitimate exchange induced coalescence from similar broadened lineshape features, and this approach should be avoided.

Author : Bob D. Guenther
Publisher : Academic Press
ISBN 13 : 0128149825
Total Pages : 2253 pages
Book Rating : 4.29/5 ( download)

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Download or read book Encyclopedia of Modern Optics written by Bob D. Guenther and published by Academic Press. This book was released on 2018-02-14 with total page 2253 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Modern Optics, Second Edition, Five Volume Set provides a wide-ranging overview of the field, comprising authoritative reference articles for undergraduate and postgraduate students and those researching outside their area of expertise. Topics covered include classical and quantum optics, lasers, optical fibers and optical fiber systems, optical materials and light-emitting diodes (LEDs). Articles cover all subfields of optical physics and engineering, such as electro-optical design of modulators and detectors. This update contains contributions from international experts who discuss topics such as nano-photonics and plasmonics, optical interconnects, photonic crystals and 2D materials, such as graphene or holy fibers. Other topics of note include solar energy, high efficiency LED’s and their use in illumination, orbital angular momentum, quantum optics and information, metamaterials and transformation optics, high power fiber and UV fiber lasers, random lasers and bio-imaging. Addresses recent developments in the field and integrates concepts from fundamental physics with applications for manufacturing and engineering/design Provides a broad and interdisciplinary coverage of specialist areas Ensures that the material is appropriate for new researchers and those working in a new sub-field, as well as those in industry Thematically arranged and alphabetically indexed, with cross-references added to facilitate ease-of-use

Author : Minhaeng Cho
Publisher : CRC Press
ISBN 13 : 1420084305
Total Pages : 396 pages
Book Rating : 4.06/5 ( download)

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Download or read book Two-Dimensional Optical Spectroscopy written by Minhaeng Cho and published by CRC Press. This book was released on 2009-06-16 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-Dimensional Optical Spectroscopy discusses the principles and applications of newly emerging two-dimensional vibrational and optical spectroscopy techniques. It provides a detailed account of basic theory required for an understanding of two-dimensional vibrational and electronic spectroscopy. It also bridges the gap between the formal developm

Author : Tiago Buckup
Publisher : Springer
ISBN 13 : 3030024784
Total Pages : 320 pages
Book Rating : 4.89/5 ( download)

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Download or read book Multidimensional Time-Resolved Spectroscopy written by Tiago Buckup and published by Springer. This book was released on 2018-12-07 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field.