Download or read book Accurate Condensed Phase Quantum Chemistry written by Fred Manby and published by CRC Press. This book was released on 2010-08-02 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical methods of quantum chemistry have matured to the point that accurate predictions can be made and experiments can be understood for a wide range of important gas-phase phenomena. A large part of this success can be attributed to the maturation of hierarchies of approximation, which allow one to approach very high accuracy, provided t

Download or read book Theoretical Methods in Condensed Phase Chemistry written by S.D. Schwartz and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is meant to provide a window on the rapidly growing body of theoretical studies of condensed phase chemistry. A brief perusal of physical chemistry journals in the early to mid 1980’s will find a large number of theor- ical papers devoted to 3-body gas phase chemical reaction dynamics. The recent history of theoretical chemistry has seen an explosion of progress in the devel- ment of methods to study similar properties of systems with Avogadro’s number of particles. While the physical properties of condensed phase systems have long been principle targets of statistical mechanics, microscopic dynamic theories that start from detailed interaction potentials and build to first principles predictions of properties are now maturing at an extraordinary rate. The techniques in use range from classical studies of new Generalized Langevin Equations, semicl- sical studies for non-adiabatic chemical reactions in condensed phase, mixed quantum classical studies of biological systems, to fully quantum studies of m- els of condensed phase environments. These techniques have become sufficiently sophisticated, that theoretical prediction of behavior in actual condensed phase environments is now possible. and in some cases, theory is driving development in experiment. The authors and chapters in this book have been chosen to represent a wide variety in the current approaches to the theoretical chemistry of condensed phase systems. I have attempted a number of groupings of the chapters, but the - versity of the work always seems to frustrate entirely consistent grouping.

Download or read book New Methods in Computational Quantum Mechanics Volume 93 written by Ilya Prigogine and published by Wiley-Interscience. This book was released on 1997-06-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of quantum chemistry for the quantitative prediction of molecular properties has long been frustrated by the technical difficulty of carrying out the needed computations. In the last decade there have been substantial advances in the formalism and computer hardware needed to carry out accurate calculations of molecular properties efficiently. These advances have been sufficient to make quantum chemical calculations a reliable tool for the quantitative interpretation of chemical phenomena and a guide to laboratory experiments. However, the success of these recent developments is not well known outside the community of practitioners. In order to make the larger community of chemical physicists aware of the current state of the subject, this self-contained volume of Advances in Chemical Physics surveys a number of the recent accomplishments in computational quantum chemistry. Supplemented with more than 150 illustrations, this volume provides evaluations of a broad range of methods, including: Quantum Monte Carlo methods in chemistry Monte Carlo methods for real-time path integration The Redfield equation in condensed-phase quantum dynamics Multiconfigurational perturbation theory—applications in electronic spectroscopy Electronic structure calculations for molecules containing transition metals And more.

Download or read book Beyond Standard Quantum Chemistry written by Ramón Hernández-Lamoneda and published by . This book was released on 2007-01-01 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book represents an effort to illustrate the breadth and quality of theoretical chemistry research developed at the Universidad Autónoma del Estado de Morelos(UAEMor) in Cuernavaca, México. The reader will find that the contents covered in eight chapters are heterogeneous in their subject matter but, on the other hand, they encompass a wide variety of topics of current research interest in the theoretical chemistry community. The chapters have been ordered from the gas phase, passing to properties of small clusters and liquid solutions, finally leading to solid state studies. The first three chapters deal with small but challenging molecular systems, use of state of the art methodology in their description and a detailed comparison with recent high quality experimental information. Even though the emphasis is on a quantitative description, which challenges contemporary experiments, often new qualitative insights are obtained from these studies which help in the interpretation of previous experimental data and suggest new directions for future work. The next three chapters are devoted to the theoretical description of solvation effects, they go from a microscopic analysis of hydration to an account of the thermodynamical and structural properties of liquid solutions. Starting with detailed studies of protonated water clusters of increasing size, which rely on semiempirical electronic structure calculations, they provide a bridge with the previous chapters, then going to studies of solvation effects for larger solutes using a combination of ab initio based intermolecular potentials together with Monte Carlo simulations as a means to improve models based on the properties of the cavity around the solute and ending with a study of how to improve models that treat the solvent as a continuum by including a microscopic description of the solvent through the use of a lattice around the solute with points of adjustable polarizability. The book closes with two methodologically oriented studies on solid state theoretical chemistry. Both studies illustrate the fact that the development of ab initio methodology and its numerical implementation for the case of crystals is still a very active area of research which borrows some ideas from the more mature molecular electronic structure but has to tackle challenging problems which are inherent to the perfect crystal approach. This is the case in the first study of this section, in which the particular role of space symmetry in the computational implementation of the vibrational analysis in crystalline systems is highlighted. As regards the last chapter, it is devoted to develop a general way to perform variational procedures in crystalline systems in terms of Localized Wannier Functions, which provide a representation alternative to that of the usually considered Bloch Functions. The extension of the Boys localization scheme to periodic systems is used as an illustrating example of the general procedure. We believe that a common ground for all the chapters is the fact that the theoretical tools that are being developed and/or applied to describe a rich variety of chemical systems provide alternatives either in conceptual framework and new qualitative insights, computational efficiency or accuracy in quantitative comparisons with experiment, which go beyond the standard approaches. Most of the contributions include international collaborations which certainly add to the richness and quality of this book and I am sure the local authors will continue to benefit from such collaborations. It is our hope that the current volume will serve as a useful introduction to current research in theoretical chemistry for graduate students and post-doctoral associates but also as a reference for experts coming from the main areas of specialization in this field. The book can also be valuable for experimentalists since several of the book chapters address problems which are being analyzed both by experiment and theory.

Download or read book New Methods in Computational Quantum Mechanics written by Ilya Prigogine and published by John Wiley & Sons. This book was released on 2009-09-09 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of quantum chemistry for the quantitative prediction of molecular properties has long been frustrated by the technical difficulty of carrying out the needed computations. In the last decade there have been substantial advances in the formalism and computer hardware needed to carry out accurate calculations of molecular properties efficiently. These advances have been sufficient to make quantum chemical calculations a reliable tool for the quantitative interpretation of chemical phenomena and a guide to laboratory experiments. However, the success of these recent developments in computational quantum chemistry is not well known outside the community of practitioners. In order to make the larger community of chemical physicists aware of the current state of the subject, this self-contained volume of Advances in Chemical Physics surveys a number of the recent accomplishments in computational quantum chemistry. This stand-alone work presents the cutting edge of research in computational quantum mechanics. Supplemented with more than 150 illustrations, it provides evaluations of a broad range of methods, including: * Quantum Monte Carlo methods in chemistry * Monte Carlo methods for real-time path integration * The Redfield equation in condensed-phase quantum dynamics * Path-integral centroid methods in quantum statistical mechanics and dynamics * Multiconfigurational perturbation theory-applications in electronic spectroscopy * Electronic structure calculations for molecules containing transition metals * And more Contributors to New Methods in Computational Quantum Mechanics KERSTIN ANDERSSON, Department of Theoretical Chemistry, Chemical Center, Sweden DAVID M. CEPERLEY, National Center for Supercomputing Applications and Department of Physics, University of Illinois at Urbana-Champaign, Illinois MICHAEL A. COLLINS, Research School of Chemistry, Australian National University, Canberra, Australia REINHOLD EGGER, Fakultät für Physik, Universität Freiburg, Freiburg, Germany ANTHONY K. FELTS, Department of Chemistry, Columbia University, New York RICHARD A. FRIESNER, Department of Chemistry, Columbia University, New York MARKUS P. FÜLSCHER, Department of Theoretical Chemistry, Chemical Center, Sweden K. M. HO, Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa C. H. MAK, Department of Chemistry, University of Southern California, Los Angeles, California PER-ÅKE Malmqvist, Department of Theoretical Chemistry, Chemical Center, Sweden MANUELA MERCHán, Departamento de Química Física, Universitat de Valéncia, Spain LUBOS MITAS, National Center for Supercomputing Applications and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Illinois STEFANO OSS, Dipartimento di Fisica, Università di Trento and Istituto Nazionale di Fisica della Materia, Unità di Trento, Italy KRISTINE PIERLOOT, Department of Chemistry, University of Leuven, Belgium W. THOMAS POLLARD, Department of Chemistry, Columbia University, New York BJÖRN O. ROOS, Department of Theoretical Chemistry, Chemical Center, Sweden LUIS SERRANO-ANDRÉS, Department of Theoretical Chemistry, Chemical Center, Sweden PER E. M. SIEGBAHN, Department of Physics, University of Stockholm, Stockholm, Sweden WALTER THIEL, Institut für Organische Chemie, Universität Zürich, Zürich, Switzerland GREGORY A. VOTH, Department of Chemistry, University of Pennsylvania, Pennsylvania C. Z. Wang, Ames Laboratory and Department of Physi

Download or read book Entropies of Condensed Phases and Complex Systems written by Christian Spickermann and published by Springer Science & Business Media. This book was released on 2011-01-18 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Predicting thermodynamic quantities for chemically realistic systems on the basis of atomistic calculations is still, even today, a nontrivial task. Nonetheless, accurate treatment of inter-particle interactions, in terms of quantum chemical first principles methods, is a prerequisite for many applications, because of the complexity of both reactants and solvents in modern molecular sciences. Currently, a straightforward calculation of thermodynamic properties from these methods is only possible for high-temperature and low- density systems. Although the enthalpy of a system can often be predicted to a good level of precision with this ideal gas approach, calculating the entropy contribution to the free energy is problematic, especially as the density of the system increases. This thesis contains a compact and coherent introduction of basic theoretical features. The foundations are then laid for the development of approaches suitable for calculation of condensed phase entropies on the basis of well-established quantum chemical methods. The main emphasis of this work is on realistic systems in solution, which is the most important environment for chemical synthesis. The presented results demonstrate how isolated molecular concepts typically employed in modern quantum chemistry can be extended for the accurate determination of thermodynamic properties by means of scale- transferring approaches.

Download or read book Modern Methods for Multidimensional Dynamics Computations in Chemistry written by Donald Leo Thompson and published by World Scientific. This book was released on 1998 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes many of the key practical theoretical techniques that have been developed to treat chemical dynamics problems in many-atom systems. It contains thorough treatments of fundamental theory and prescriptions for performing computations. The selection of methods, ranging from gas phase bimolecular reactions to complex processes in condensed phases, reflects the breadth of the field.The book is an excellent reference for proven and accepted methods as well as for theoretical approaches that are still being developed. It is appropriate for graduate students and other ?novices? who wish to begin working in chemical dynamics as well as active researchers who wish to acquire a wider knowledge of the field.

Download or read book Quantum Chemistry and Dynamics of Excited States written by Leticia González and published by John Wiley & Sons. This book was released on 2021-02-01 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to the rapidly evolving methodology of electronic excited states For academic researchers, postdocs, graduate and undergraduate students, Quantum Chemistry and Dynamics of Excited States: Methods and Applications reports the most updated and accurate theoretical techniques to treat electronic excited states. From methods to deal with stationary calculations through time-dependent simulations of molecular systems, this book serves as a guide for beginners in the field and knowledge seekers alike. Taking into account the most recent theory developments and representative applications, it also covers the often-overlooked gap between theoretical and computational chemistry. An excellent reference for both researchers and students, Excited States provides essential knowledge on quantum chemistry, an in-depth overview of the latest developments, and theoretical techniques around the properties and nonadiabatic dynamics of chemical systems. Readers will learn: ● Essential theoretical techniques to describe the properties and dynamics of chemical systems ● Electronic Structure methods for stationary calculations ● Methods for electronic excited states from both a quantum chemical and time-dependent point of view ● A breakdown of the most recent developments in the past 30 years For those searching for a better understanding of excited states as they relate to chemistry, biochemistry, industrial chemistry, and beyond, Quantum Chemistry and Dynamics of Excited States provides a solid education in the necessary foundations and important theories of excited states in photochemistry and ultrafast phenomena.

Download or read book Multi layer Methods for Quantum Chemistry in the Condensed Phase written by Adrian William George Lange and published by . This book was released on 2012 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We discuss the development and application of a number of theoretical physical models focused on improving our understanding of quantum chemical phenomena in condensed phase environments, especially aqueous solutions. The large number of atoms and molecules present in such systems precludes the application of the most advanced and accurate quantum chemistry theories available due to their exponential growth of required computational power with respect to the number of electrons in a system. As a feasible alternative, we opt to take a "multi-layer" approach, wherein the full chemical system is partitioned into different layers treated with varying levels of approximation, circumventing the exponential scaling computational cost. How this partitioning is performed and applied appropriately is the principal emphasis of this work.

Download or read book Chemical Dynamics in Condensed Phases written by Abraham Nitzan and published by Oxford University Press. This book was released on 2006-04-06 with total page 743 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graduate level textbook presenting some of the most fundamental processes that underlie physical, chemical and biological phenomena in complex condensed phase systems. Includes in-depth descriptions of relevant methodologies, and provides ample introductory material for readers of different backgrounds.

Download or read book New Methods in Computational Quantum Mechanics Volume 93 written by Ilya Prigogine and published by Wiley-Interscience. This book was released on 1996-04-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of quantum chemistry for the quantitative prediction of molecular properties has long been frustrated by the technical difficulty of carrying out the needed computations. In the last decade there have been substantial advances in the formalism and computer hardware needed to carry out accurate calculations of molecular properties efficiently. These advances have been sufficient to make quantum chemical calculations a reliable tool for the quantitative interpretation of chemical phenomena and a guide to laboratory experiments. However, the success of these recent developments in computational quantum chemistry is not well known outside the community of practitioners. In order to make the larger community of chemical physicists aware of the current state of the subject, this self-contained volume of Advances in Chemical Physics surveys a number of the recent accomplishments in computational quantum chemistry. This stand-alone work presents the cutting edge of research in computational quantum mechanics. Supplemented with more than 150 illustrations, it provides evaluations of a broad range of methods, including: * Quantum Monte Carlo methods in chemistry * Monte Carlo methods for real-time path integration * The Redfield equation in condensed-phase quantum dynamics * Path-integral centroid methods in quantum statistical mechanics and dynamics * Multiconfigurational perturbation theory-applications in electronic spectroscopy * Electronic structure calculations for molecules containing transition metals * And more Contributors to New Methods in Computational Quantum Mechanics KERSTIN ANDERSSON, Department of Theoretical Chemistry, Chemical Center, Sweden DAVID M. CEPERLEY, National Center for Supercomputing Applications and Department of Physics, University of Illinois at Urbana-Champaign, Illinois MICHAEL A. COLLINS, Research School of Chemistry, Australian National University, Canberra, Australia REINHOLD EGGER, Fakultät für Physik, Universität Freiburg, Freiburg, Germany ANTHONY K. FELTS, Department of Chemistry, Columbia University, New York RICHARD A. FRIESNER, Department of Chemistry, Columbia University, New York MARKUS P. FÜLSCHER, Department of Theoretical Chemistry, Chemical Center, Sweden K. M. HO, Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa C. H. MAK, Department of Chemistry, University of Southern California, Los Angeles, California PER-KE Malmqvist, Department of Theoretical Chemistry, Chemical Center, Sweden MANUELA MERCHán, Departamento de Química Física, Universitat de Valéncia, Spain LUBOS MITAS, National Center for Supercomputing Applications and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Illinois STEFANO OSS, Dipartimento di Fisica, Università di Trento and Istituto Nazionale di Fisica della Materia, Unità di Trento, Italy KRISTINE PIERLOOT, Department of Chemistry, University of Leuven, Belgium W. THOMAS POLLARD, Department of Chemistry, Columbia University, New York BJÖRN O. ROOS, Department of Theoretical Chemistry, Chemical Center, Sweden LUIS SERRANO-ANDRÉS, Department of Theoretical Chemistry, Chemical Center, Sweden PER E. M. SIEGBAHN, Department of Physics, University of Stockholm, Stockholm, Sweden WALTER THIEL, Institut für Organische Chemie, Universität Zürich, Zürich, Switzerland GREGORY A. VOTH, Department of Chemistry, University of Pennsylvania, Pennsylvania C. Z. Wang, Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa

Download or read book Quantum Chemistry and Dynamics of Excited States written by Leticia González and published by John Wiley & Sons. This book was released on 2020-11-10 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to the rapidly evolving methodology of electronic excited states For academic researchers, postdocs, graduate and undergraduate students, Quantum Chemistry and Dynamics of Excited States: Methods and Applications reports the most updated and accurate theoretical techniques to treat electronic excited states. From methods to deal with stationary calculations through time-dependent simulations of molecular systems, this book serves as a guide for beginners in the field and knowledge seekers alike. Taking into account the most recent theory developments and representative applications, it also covers the often-overlooked gap between theoretical and computational chemistry. An excellent reference for both researchers and students, Excited States provides essential knowledge on quantum chemistry, an in-depth overview of the latest developments, and theoretical techniques around the properties and nonadiabatic dynamics of chemical systems. Readers will learn: ● Essential theoretical techniques to describe the properties and dynamics of chemical systems ● Electronic Structure methods for stationary calculations ● Methods for electronic excited states from both a quantum chemical and time-dependent point of view ● A breakdown of the most recent developments in the past 30 years For those searching for a better understanding of excited states as they relate to chemistry, biochemistry, industrial chemistry, and beyond, Quantum Chemistry and Dynamics of Excited States provides a solid education in the necessary foundations and important theories of excited states in photochemistry and ultrafast phenomena.

Download or read book Classical And Quantum Dynamics In Condensed Phase Simulations Proceedings Of The International School Of Physics written by Bruce J Berne and published by World Scientific. This book was released on 1998-06-17 with total page 881 pages. Available in PDF, EPUB and Kindle. Book excerpt: The school held at Villa Marigola, Lerici, Italy, in July 1997 was very much an educational experiment aimed not just at teaching a new generation of students the latest developments in computer simulation methods and theory, but also at bringing together researchers from the condensed matter computer simulation community, the biophysical chemistry community and the quantum dynamics community to confront the shared problem: the development of methods to treat the dynamics of quantum condensed phase systems.This volume collects the lectures delivered there. Due to the focus of the school, the contributions divide along natural lines into two broad groups: (1) the most sophisticated forms of the art of computer simulation, including biased phase space sampling schemes, methods which address the multiplicity of time scales in condensed phase problems, and static equilibrium methods for treating quantum systems; (2) the contributions on quantum dynamics, including methods for mixing quantum and classical dynamics in condensed phase simulations and methods capable of treating all degrees of freedom quantum-mechanically.

Download or read book Linear Scaling Techniques in Computational Chemistry and Physics written by Robert Zaleśny and published by Springer Science & Business Media. This book was released on 2011-03-21 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Linear-Scaling Techniques in Computational Chemistry and Physics" summarizes recent progresses in linear-scaling techniques and their applications in chemistry and physics. In order to meet the needs of a broad community of chemists and physicists, the book focuses on recent advances that extended the scope of possible exploitations of the theory. The first chapter provides an overview of the present state of the linear-scaling methodologies and their applications, outlining hot topics in this field, and pointing to expected developments in the near future. This general introduction is then followed by several review chapters written by experts who substantially contributed to recent developments in this field. The purpose of this book is to review, in a systematic manner, recent developments in linear-scaling methods and their applications in computational chemistry and physics. Great emphasis is put on the theoretical aspects of linear-scaling methods. This book serves as a handbook for theoreticians, who are involved in the development of new efficient computational methods as well as for scientists, who are using the tools of computational chemistry and physics in their research.

Download or read book Design and Implementation of Quantum Chemistry Methods for the Condensed Phase written by Kevin D. Carter-Fenk and published by . This book was released on 2021 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Journey Through Water A Scientific Exploration of The Most Anomalous Liquid on Earth written by Jestin Baby Mandumpal and published by Bentham Science Publishers. This book was released on 2017-03-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Journey Through Water: A Scientific Exploration of The Most Anomalous Liquid on Earth, is a monograph about water at molecular level. The monograph explores how its peculiar properties are related to its molecular structure. Readers are introduced to water through information about water in a wider perspective, properties of its liquid state, experimental techniques for molecular level investigations of liquid water, and computer simulation techniques. This is followed by chapters explaining the structural properties and principal applications of various phases of water (water as a normal liquid, supercooled water, ice and supercritical water). Key features of this reference include: - easy to understand, sequential and structured text making this reference ideal for readers with limited scientific knowledge of water physics - a list of institutions where water research is promoted in larger scales - 130 figures which supplement the text - an explanation of ten principal anomalies of water and associated theories The book is an excellent resource for novice researchers (physicists, chemists and chemical engineers) working on water and laymen who are interested in furthering their understanding of this precious liquid.

Download or read book Accurate and Efficient Quantum Chemistry Calculations for Noncovalent Interactions in Many body Systems written by Ka Un Lao and published by . This book was released on 2016 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the development and application of a number of fragmentation methods focused on understanding of intermolecular interactions in different systems. The advantage of fragmentation methods is to avoid the exponential growth of required computational power for the most advanced and accurate quantum chemistry theories which preclude the application in systems with large number of atoms and molecules. In those fragmentation methods, the full chemical system is partitioned into different subsystems, circumventing the exponential scaling computational cost. How this partitioning is performed and applied appropriately is the principal emphasis of this work. One of the fragmentation methods developed by our group, called extended XSAPT, combines an efficient, iterative, monomer-based approach to computing many-body polarization interactions with a two-body version of symmetry-adapted perturbation theory (SAPT). The result is an efficient method for computing accurate intermolecular interaction energies in large non-covalent assemblies such as molecular and ionic clusters, supramolecular complexes, clathrates, or DNA--drug complexes. As in traditional SAPT, the XSAPT energy is decomposable into physically-meaningful components. Dispersion interactions are problematic in traditional low-order SAPT, and the empirical atom-atom dispersion potentials are introduced here in an attempt to improve this situation. Comparison to high-level ab initio benchmarks for biologically-related dimers, water clusters, halide--water clusters, supremolecular complexes, methane clathrate hydrates, and a DNA intercalation complex illustrate both the accuracy of XSAPT-based methods as well as their limitations. The computational cost of XSAPT scales as third to fifth order with respect to monomer size, depending upon the particular version that is employed, but the accuracy is typically superior to alternative ab initio methods with similar scaling. Moreover, the monomer-based nature of XSAPT calculations makes them trivially parallelizable, such that wall times scale linearly with respect to the number of monomer units. XSAPT-based methods thus open the door to both qualitative and quantitative studies of non-covalent interactions in clusters, biomolecules, and condensed-phase systems.